James
M. Fragomeni
____________________________________________________________________________________
Campus Address Mailing Address United States Citizen
The
Mechanical Engineering Royal
Oak, Michigan fax:
313-993-1409
fragomjm@udmercy.edu
home phone: 248-245-4843
______________________________________________________________________________
Research
Interests
Solid Mechanics and Materials, Aluminum Alloys,
Mechanical Metallurgy, Micromechanical Modeling, Material Science,
Precipitation Hardening, Welding, High Temperature Alloys, Materials Design,
Strength of Materials, Microstructure-Property Relationship, Chemistry of
Materials, Quantitative Microscopy
Teaching
Interests
Material Science, Mechanical Behavior of
Materials, Fatigue of Metals, Mechanics, Plastic Deformation, Statics and Dynamics, Strength of Materials, Heat Transfer,
Statistics, Physical Metallurgy, Engineering Materials, Elasticity, Mechanical
Metallurgy, Chemistry of Materials, Manufacturing Science, Chemistry.
Current
Position
Assistant Professor in Mechanical Engineering at
The University of Detroit Mercy, Michigan (Sept.2000-present)
University
Education
Purdue University,
West Lafayette, Indiana, School of Mechanical Engineering, Design Department
Graduate Advisor: Professor B.M. Hillberry;
Graduate Research sponsored by the National Science Foundation through
the Purdue University Engineering Research Center (ERC). Materials
engineering research involving microstructure and mechanical property modeling.
(Nov. 1986 - Dec. 1994)
Doctor
of Philosophy in Mechanical Engineering, August 1994; Course
emphasis in mechanical metallurgy, material science, solid mechanics, and
materials engineering. Ph.D.
Thesis: "A Method to Predict the Precipitation Hardening Response of
Particle Strengthened Alloys."
Master
of Science in Engineering, December 1989;
Graduate Engineering Program, attended part-time while working in
industry. (Sept.'85 -
Jan.'86)
The
(Sept.’81-May’85)
Bachelor
of Science in Metallurgical Engineering, with high honors,
May 1985; Course emphasis in physical, process, and mechanical metallurgy,
material science, advanced mathematics, and materials.
BS
Senior Thesis: "The Effect on Mechanical and Fatigue
Properties Induced by Sintering Powder on Titanium, Ti-6Al-4V ELI,
Substrates." Research sponsored by Dynamet, Inc.
Research
and Industry Experience
Worked as a graduate research assistant on a
global research project sponsored by the National Science Foundation
through the
Worked on project with ALCOA for the material
processing of aluminum-lithium alloy 2090 and a
aluminum-lithium-zirconium research alloy at the ALCOA Lafayette Extrusion
Works. Obtained experience using Scanning Electron Microscope
(SEM) and MTS hydraulic tensile testing machine. Computer experience in
UNIX, SAS, and Fortran.
Developed a method to
predict the precipitation strengthening response of some precipitation hardened
alloys from the material processing and microstructure using a minimum number
of experimental tests.
United
States Steel Corporation (Gary Steel Works) -
Worked in the Quality
Assurance Department. Involved with various
projects to improve quality and production of cast steel sheet products,
ingots, and plates. Involved in the start-up of a continuous steel casting facility. Learned continuous steel
casting process, tundish and ladle metallurgy, and
quality engineering. Statistical process control (SPC), SAS computer
language, and process metallurgy.
Allegheny
Ludlum Steel Corporation (
Worked in the Physical Metallurgy Department as
a summer intern research engineer. Worked on project using
grain-size statistics to determine the grain-size distributions of
grain-oriented silicon steel.
Developed Fortran computer software to predict
the grain-size and distribution.
Whirlpool
Corporation -
Worked part-time at
the Manufacturing Research and
Worked as an assistant
researcher at the Center for Information and Numerical Data Analysis and
Synthesis (CINDAS) of
Worked on a research
project focusing on methods of joining ceramics to ceramics and ceramics to
alloys and metals for high temperature corrosive turbine engine environment of
NAVY turbine aircraft engines.
NASA
Marshall Space Flight Center - Huntsville, Alabama
May-Aug. 1996
Worked
through the university summer faculty fellowship program through the
Worked
in the Materials and Processes Laboratory through the summer faculty fellowship
program through the
Wright
Patterson Air Force Base -
Worked
at the Air Force Research Laboratory in the Materials and Manufacturing
Directorate. Research involved the mechanical
behavior and microstructure studies of aluminum-lithium alloys to correlate the
mechanical properties to the internal structure and processing. Studied the microstructure
of aluminum-lithium alloys 2090 and AF/C458 using transmission electron
microscopy and quantitative analysis.
University
Experience
The
Working
as an Assistant Professor in the Mechanical Engineering Department. To date have taught one class of
Manufacturing Processes (ME382), one class of Manufacturing Processes Lab
(ME383), Engineering Materials II (E582), Materials I (GCT201), Materials II
(GCT202). Currently
teaching two classes of Science of Materials (E317) at Ford Motor Company, and
one class of Elements of Machine Design I (ME390). Publishing conference and journal papers
involving aerospace aluminum alloys.
Participated in the Polyurethane Elastomer
Workshop at univ of
Worked
as an Assistant Professor in the Mechanical Engineering Department.
Have taught five classes of Metal Processing (ME313), three classes of Thermal
Design (ME417), one class of Machine Design (ME403), two classes Senior Design
Lab (ME498), one class of Manufacturing Processes (ME562), two classes of
Mechanical Behavior of Materials (ME563/463), and two years of student advising
for Senior Design (ME499) Projects.
Graduated five Masters students in Mechanical
Engineering and two PACE Senior Research Scholar. Published journal and conference papers and
wrote research proposals, and purchased a new quantitative image analysis light
optical microscopy system. Preformed compression testing of precipitation aged aerospace and aircraft
aluminum alloys. Involved in scanning and transmission electron microscopy studies
of microstructure and properties of aerospace alloys 2090 and AF/C458.
The
Worked as a Assistant
Professor in the Engineering Science and Mechanics Department; Instructor for three classes of Engineering Statics (ESM-201) in two semesters, two semesters of
Particle Dynamics ESM-202), one semester class of Dynamics (ESM-264), and one
semester class of Mechanics of Materials (ESM-250). Also published and presented conference
papers, and was involved in materials research and various departmental
activities.
The
University of Alabama - College of Engineering, Tuscaloosa,
Alabama Aug.'96-May'97
Worked as a Assistant
Professor in the Department of Aerospace Engineering & Mechanics. Taught four classes of Engineering Statics
(ESM-201) and two semester classes of Mechanics of Materials (ESM-250). Taught a Quest TV course
for statics as part of the University distant
learning program. Published and presented papers at conferences and was
active in SWE and AIAA student groups.
Research
Publications
JOURNAL PUBLICATIONS
Fragomeni,
J.M., Hillberry, B.M., Sanders, Jr., T.H., and Gaitatzes, A.G., "Integration of Microstructural
Development and Properties Design into the CAD/CAM Environment," Transactions of the ASME, Journal of Engineering Materials and
Technology, Volume 114, No. 1, pp. 34-40, January 1992.
Fragomeni, J.M., and Hillberry,
B.M., “A Micromechanical Method for Predicting the Precipitation Hardening
Response of Particle Strengthened Alloys Hardened by Ordered Precipitates”, Acta Mechanica,
Vol. 138, pp. 185-210, December 1999.
Fragomeni, J.M., and Hillberry, B.M., “The Effect of Heat Treatment on the
Microstructure and Mechanical Properties of an Aluminum Lithium Alloy”, Aluminum Transactions, An International
Journal, Volume 2(1), pp. 107-120, 2000.
Fragomeni,
J.M., and Hillberry, B.M., "Determining the
Effect of Microstructure and Heat Treatment on the Mechanical Strengthening
Behavior of an Aluminum Alloy Containing Lithium Precipitation Hardened with
the δ' Al3Li Intermetallic
Phase", Journal of Materials
Engineering and Performance, Vol. 9, No. 4, pp. 428-440, August 2000.
Fragomeni,
J.M., "Effect of Heat Treating on the Microstructure and Fatigue Behavior
of a Ti-6wt.%Al-4wt.%V ELI Alloy", Journal
of Advanced Materials, Vol. 33, No. 3, pp. 18-25, July 2001.
Conference Proceedings
Fragomeni, J.M, and Hillberry, B.M., "The Effect
of Heat Treating on the Precipitation Response and Microstructure of an
Aluminum-Lithium-Zirconium Alloy", 20th
ASM Heat Treating Society Conference Proceedings, edited by K. Funatani, and G.E. Totten, Vol.
2, pp. 1101-1110, 2000.
Fragomeni, J.M., "The Effect of Extrusion Manufacturing and Material
Processing on the Mechanical Properties and Microstructure of Aluminum-Lithium
Alloys", TMS Proceedings of the Second
International Conference on Processing Materials for Properties, Edited by
B. Mishra, and C. Yamauchi, TMS, pp. 89-95, 2000.
Fragomeni, J.M., "The Effect of Aging on the Microstructure and
Precipitation Response of an Aluminum-Lithium Alloy", Recent Advances in
Solids and Structures, PVP-Vol. 415, ASME
Proceedings of the 2000 Winter Annual Meeting, edited by H.H. Chung and
Y.W. Kwon, pp. 105-113, 2000.
Fragomeni,
J.M., "A Manufacturing Materials Approach for Relating Extrusion
Deformation to Mechanical Properties and Microstructure of Aluminum-Lithium
Alloys", Light Metals 2000 Metaux Legers, MetSoc 39th Annual Conference Proceedings of the
International Symposium on Light Metals, Edited by J. Kazadi
and J. Masounave, pp. 295--305, 2000.
Fragomeni,
J.M., "The Effect of High Temperature Aging on the Thermomechanical
Behavior of Heat-Treated Aluminum-Lithium Alloys", Proceedings of
International Conference on Advances in Production and Processing of Aluminum,
APPA 2001, pp. 16.3.1-16.3.16, Feb. 2001.
Fragomeni,
J.M., “The Consequence of Heat Treating on the Microstructure, Fatigue and
Tensile Behavior of a Ti-6wt.%Al-4wt.%V Alloy”, 19th
ASM Heat Treating Society Conference Proceedings in the New Millenium”, Edited
by Sandra J. Midea and George D. Pfaffmann, pp. 217-225, Nov. 1999.
Fragomeni, J.M., “Plastic Deformation Mechanisms
and Fracture Behavior of Age Hardened Aluminum-Lithium-Zirconium Alloys”,
SECTAM – XX, Proceedings of the
Twenty Southeastern Conference on
Theoretical and Applied Mechanics, edited by H.V. Tippur
and R.K. Raju, April 2000.
Fragomeni,
J.M., and Hillberry, B.M., “Controlling the Particle
Size, Spacing, Distribution, Volume Fraction, and Growth Rate of Intermetallic Particles in Binary Aluminum-Lithium Alloys
by Thermal Processing and Composition Control”, ”, 19th ASM Heat
Treating Society Conference Proceedings in the New Millenium”, Edited by Sandra
J. Midea and George D. Pfaffmann, pp. 58-67, Nov. 1999.
Fragomeni,
J.M., “The Plastic Deformation Mechanisms, Strength, and Fracture Behavior of a
Precipitation Hardened Aluminum-Lithium-Zirconium Alloy”, Materials Science Forum, Vols. 331-337, part 3, Trans Tech
Publications, Switzerland, pp.
1567-1580, 2000.
Fragomeni,
J.M., “The Influence of Heat Treating on the Microstructure and Ductility of a
Particle Strengthened Al-2.6wt.%Li-0.09wt.%Zr Alloy”, Proceedings of the 18th ASM Heat Treating Conference,
Edited by R.A. Wallis, amd H.W. Walton, ASM Heat
Treating Society, pp. 419-429, 1999.
Fragomeni,
J.M., and Nunes Jr., A.C., “Potential for Fabric
Damage by Welding Electron Beam”, Proceedings
of the 5th International Conference on Trends in Welding Research,
American Welding Society, and ASM International, Edited by J.M. Vitek et al., pp. 498-502, 1999.
Fragomeni,
J.M., Hillberry, B.M., Sanders, Jr., T.H., and Gaitatzes, A.G., "Integration of Microstructural
Development and Properties Design into the CAD/CAM Environment," Microstructural Development and Control in Materials
Processing, edited by D.R. Durham and A. Saigal,
The American Society of Mechanical
Engineers, New York, MD-Vol. 14, pp. 1-9, December 1989.
Fragomeni,
J.M., and Nunes Jr., A.C., “An Assessment of Molten
Metal Detachment Hazards During Electron Beam Welding in Space”, Developments
in Theoretical and Applied Mechanics, Volume XIX, Proceedings of the Nineteenth Southeastern Conference on Theoretical
and Applied Mechanics, edited by C.T. Tsai and K.K. Stevens, pp. 461-472,
1998.
Fragomeni,
J.M., Hillberry, B.M., and Sanders, Jr., T.H., "An Investigation of the d¢
Particle Strengthening Mechanisms and Microstructure for an Al-Li-Zr Alloy," Proceedings
of the Fifth International Aluminum-Lithium Conference, Materials and
Component Engineering Publications Ltd., Birmingham, UK, pp. 837-849, 1989.
Fragomeni,
J.M., and Hillberry, B.M., "Predicting the
Particle Shearing and Particle Looping Response for a Precipitation Hardened
Alloy Strengthened by Ordered Precipitates," Developments in Theoretical
and Applied Mechanics, Volume XVIII, Proceedings
of the Eighteenth Southeastern Conference on Theoretical and Applied Mechanics,
edited by H.B. Wilson et al., pp. 109-123, 1996.
Fragomeni,
J.M., and Hillberry, B.M., "A Method to Predict
the Precipitation Hardening Response of A Particle Strengthened Aluminum-Lithium
Alloy", Recent Advances in
Solids/Structures and Application of Metallic Materials, Edited by Y.W.
Kwon, D.C. Davis, and H.H. Chung, The American Society of Mechanical Engineers,
PVP-Vol. 342, MD-Vol. 72, pp. 185-203, 1996.
Fragomeni,
J.M, and Hillberry, B.M, "Predicting the
Precipitation Hardening Response of Particle Strengthened Alloys Hardened by
Ordered Precipitates", Recent
Advances in Solids/Structures and Application of Metallic Materials, Edited
by Y.W. Kwon, D.C. Davis, H.H. Chung, and L. Librescu,
The American Society of Mechanical Engineers, PVP-Vol. 369, pp. 355-382, 1997.
Fragomeni,
J.M., and Hillberry, B.M., "A Model for
Predicting the Precipitation Strengthening Response of Precipitation Hardened
Alloys Strengthened by Ordered Precipitates", Recent Advances in Solids/Structures and Application of Metallic
Materials, Edited by Y.W. Kwon, D.C. Davis, H.H. Chung, and Librescu, The
American Society of Mechanical Engineers, PVP-Vol. 369, pp. 93-107, 1997.
Fragomeni,
J.M., and Hillberry, B.M., “A Micromechanical Model
for Determining the Strength of Precipitation Hardened Alloys”, Developments in
Theoretical and Applied Mechanics, Volume XIX, Proceedings of the Nineteenth Southeastern Conference on Theoretical
and Applied Mechanics, edited by C.T. Tsai and K.K. Stevens, pp. 295-326,
1998.
Sanders, Jr., T.H., Grandt,
Jr., A.F., Hillberry, B.M., Fragomeni,
J.M., Henkener, J.A., Kistler,
G.P., McKeighan, P.C., Pegram,
J.E., Sater, J.M. and Valentine, M.G., "An
Extrusion Program Designed to Relate Processing Parameters to Microstructure
and Properties of an Al-2.6Li-0.09Zr Alloy," Proceedings of the Fifth International Aluminum-Lithium Conference,
Materials and Component Engineering Publications Ltd., Birmingham, UK, pp. 273-286,
1989.
Fragomeni,
J.M., “An Organizational Design of
Experiments Statistical Approach to Investigate the Effect of Extrusion Process
Manufacturing on the Mechanical Behavior of an Aluminum
Alloy”, IEMC’98 Proceedings, Pioneering
New Technologies: Management Issues and Challenges in the Third Millennium,
Edited by Lois S. Peters, Institute of
Electrical and Electronic Engineers, Inc. pp. 11-14, 1998.
Fragomeni,
J.M., “Mechanical Strength Modeling of High Temperature SiC
Discontinuosly Reinforced Aluminum Alloys”, ICCE/6 proceedings of the Sixth International Conference on Composite
Engineering, Edited by D. Hui, International Community for Composite Engineering, pp.
229-230, 1999.
Fragomeni,
J.M., “Influence of Extrusion Processing Variables on the Microstructure and
Mechanical Properties of Aluminum-Lithium Alloy Extrusions”, proceedings of the
5th International Conference
on Advanced Manufacturing Systems and Technologies, Edited by Elso Kulijanic, pp. 329-335,
1999.
Fragomeni, J.M., “The Effect of
Annealing, Overheating, and Sintered Porous Coating Thermal Treatments on the
Fatigue Properties of Ti-6.0wt.%Al-4.0wt.%V ELI Alloy Plate Specimens”, Recent Advances in Solids/Structures and
Application of Metallic Materials, Edited by H.H. Chung and Y.W. Kwon, The
American Society of Mechanical Engineers, N.Y., N.Y., PVP-Vol. 381, pp.
235-246, 1998.
Fragomeni, J.M., “A Micro-Mechanics Approach for Estimating the Yield Strength
and Ultimate Tensile Strength Responses with Heat Treatment of an Aluminum
Alloy Strengthened by the Intermetallic Compound d¢-Al3Li”, Applied
Mechanics in the Americas, Proceedings of
the Sixth Pan American Congress of Applied Mechanic (PACAM IV) , Vol. 7, pp. 851-855, 1999.
Fragomeni, J.M., “Mechanical Strength Modeling of Particle Strengthened
Nickel-Aluminum Nickel-Aluminum Alloys Strengthened
by Intermetallic Ni3Al Precipitates”, Recent Advances in Solids and Structures, Edited
by Y.W. Kwon and H.H. Chung, The American Society of Mechanical Engineers,
N.Y., N.Y., PVP-Vol. 398, pp. 179-194, 1999.
Fragomeni,
J.M., “Statistical Approach to Experimental Design to Determine the Effect of
Extrusion Variables on the Mechanical Properties of an Al-Li Alloy”, IPMM’99,
Proceedings of The Second International Conference on Intelligent
Processing and Manufacturing of Materials”, Edited by J.A. Meech, M.M. Veiga, M.H. Smith,
and S.R. LeClair, Vol. 1, pp. 585-591, 1999.
Fragomeni,
J.M., “R.R. Moore Fatigue Testing Machine Evaluation of the Mechanical Behavior
and Fatigue Properties of Heat Treated Ti-6wt.%Al-4wt.%V ELI Biomedical Alloy
Substrates”, proceedings of the Tenth
World Congress on the Theory of Machines and Mechanisms, Vol. 5, pp.
1915-1920, 1999.
Fragomeni,
J.M., “An Iterative Approach to Determine Composition and Heat Treatment from
the Mechanical Yield Strength of an Aluminum-Lithium Alloy”, IPMM’99,
Proceedings of The Second International Conference on Intelligent
Processing and Manufacturing of Materials”, Edited by J.A. Meech, M.M. Veiga, M.H. Smith,
and S.R. LeClair, Vol. 1, pp. 577-583, 1999.
Fragomeni,
J.M., “Mathematical and Computer Modeling of the Crystalline Plastic
Deformation and Strengthening Mechanisms in Advanced Aluminum Alloy Systems”, Twelfth International Conference on
Mathematical and Computer Modelling and Scientific
Computing, Book of Abstracts, p. 54, 1999.
Fragomeni,
J.M., “A Method for Predicting the Crystallographic Texture from the
Polycrystalline Mechanical Strength as a Function of Heat Treatment for a
Precipitation Hardened Aluminum Alloy”, Proceedings
of the Twelfth International Conference on Textures of Materials, edited by
Jerzy A. Szpunar, Vol.
2, pp. 901-909, 1999.
Fragomeni,
J.M., “The Deformation Mechanisms, Microstructure, and Fracture Behavior from
Precipitation Aging of an Aluminum Containing Lithium Alloy”, extended
abstract, Mechanics & Materials in
Design 3 Conference, Edited by S.A. Meguid, pp.
185-187, May 2000.
TECHNICAL REPORTS:
Fragomeni,
J.M., and El-Rahaiby, S.K., "Review of Ceramic
Joining Technology," CIAC Report 9, Contract No. DLA 900-90-0304, DoD Ceramic Information Analysis Center of the Center for
Information and Numerical Data Analysis and Synthesis of Purdue University, 2595 Yeager Road, West
Lafayette, Indiana 47906-1398. Report prepared for the
Fragomeni,
J.M., "Carbon Nitride Versus Diamond: Which is Harder?," Ceramics
Information Analysis Center (CIAC) Newsletter, DoD
Center for Information and Numerical Data Analysis and Synthesis (CINDAS) of
Purdue University, Vol. 5, No. 3, p. 10, June 1995.
J.M.
Fragomeni, “Mechanical Strength Modeling of Particle
Strengthened Nickel-Aluminum Alloys Strengthened by Intermetallic g’(Ni3Al)
Precipitates”, AFOSR Summer Faculty Research Report, pp. 1-20, August 1998.
A.C.
Nunes, Jr., C.K. Russell, F.R. Zimmerman, and J.M. Fragomeni, “Low Pressure Gas Effects on the Potency of an
Electron Beam Against Ceramic Cloth”, NASA 209762 Technical Memorandum
TM-1999-209762, November 1999.
Fragomeni, J.M., “Potential for EMU Fabric Damage by Electron Beam and Molten
Metal During Space Welding for the International Space Welding Experiment”,
NASA/ASEE Summer Faculty Fellowship Program Report, NASA Marshall Space Flight
Center, Alabama, August 1997.
Fragomeni, J.M., “An Assessment of Molten Metal Detachment Hazard for Electron
Beam Welding in the Space Shuttle Bay at Low Earth Orbit for the International
Space Welding Experiment”, NASA/ASEE Summer Faculty Fellowship Program Report,
NASA Marshall Space Flight Center, Alabama, August 1996.
A.C.
Nunes, Jr., J.M. Fragomeni,
C. Russell, and B. Bhat, “An Assessment of Molten Metal
Detachment Hazards for Electron Beam Welding in the Space Environment: Analysis and Test Results”, NASA Technical
Memorandum TM-1998-207979, May 1998.
TECHNICAL PRESENTATIONS (selected)
TMS Annual Meeting,
"Effect of Single and Duplex Aging on
Microstructure and Fatigue Crack Growth in Al-Li-Cu
Alloy AF/C458
The Materials Solution Conference 20th
ASM Heat Treating Society,
"The Effect of Heat Treating on the Precipitation
Response and Microstructure of an Aluminum-Lithium-Zirconium Alloy",
THERMEC Conference on Processing &
Manufacturing of Advanced Materials,
"Effect of Extrusion Processing Deformation
and Heat Treating on the Mechanical Behavior,
Microstructure, Anisotropy, and Plastic Flow of
Aluminum-Lithium Alloys"
ASME Winter Annual Meeting,
"The Effect of Aging on the Microstructure
and Precipitation Response of an Aluminum-Lithium Alloy"
The ASM Materials Solution Conference,
"Microstructure Response from Heat Treating
and Deformation, and the Mechanical Behavior of
a
Ti-6wt.%Al-4wt.%V Alloy"
12th International Conference on
Mathematical and Computer Modelling,
“Mathematical and Computer Modeling of the
Crystalline Plastic Deformation and Strengthening Mechanisms in Advanced
Aluminum Alloy Systems”
TMS Annual Meeting,
“Determining the Effect of Microstructure and
Heat Treatment on the Mechanical Strengthening Behavior of an Aluminum Alloy
Containing Lithium Precipitation Hardened With the Al3Li Intermetallic Phase”
The 32nd Annual Convention of the
International Metallographic Society,
“Controlling the Particle Size, Spacing,
Distribution, Volume Fraction, and Growth Rate of Intermetallic
Strengthening Particles in Aluminum-Lithium Alloys by Thermal Processing and
Composition Control”
18th ASM Heat Treating Society Materials
Solution Conference,
“The Influence of Heat Treating on the
Microstructure and Ductility of a Particle Strengthened
Al-2.6wt.%Li-0.09wt.%Zr
Alloy”
ASME Winter Annual Meeting,
"Predicting the Precipitation Hardening
Response of Particle Strengthened Alloys Hardened by
Ordered Precipitates"
ASME Winter Annual Meeting,
"A Model for Predicting the Precipitation
Strengthening Response of Precipitation Hardened
Alloys Strengthened by Ordered
Precipitates"
NASA/ASEE Faculty Fellowship Seminar,
"Potential for EMU Fabric Damage by
Electron Beam and Molten Metal During Space
Welding"
18th Southeastern Conference on Theoretical and
Applied Mechanics,
"Predicting the Particle Shearing and
Particle Looping Response for a Precipitation Hardened
Alloy Strengthened by Ordered Precipitates"
The
"A Method to Predict the Precipitation
Strengthening Response of Particle Strengthened Alloys
Hardened by Ordered Precipitates"
20th Annual Conference of Composites, Materials,
and Structures,
"Review of Ceramic Joining Technology"
ASME Winter Annual Meeting,
"A Method to Predict the Precipitation
Hardening Response of a Particle Strengthened Al-Li Alloy"
NASA/ASEE Faculty Fellowship Seminar,
“An Assessment of Molten Metal Detachment
Hazards During Electron Beam Welding in the
"A Method for Predicting the Precipitation
Hardening Response of Particle Strengthened Alloys"
ASME Winter Annual Meeting,
"Integration of Microstructural
Development and Properties Design into the CAD/CAM Environment"
"Modeling the Tensile Strength of a
Precipitation Hardened Aluminum-Lithium Alloy"
The Fifth International Aluminum-Lithium
Conference,
"An Investigation of the d’ Particle
Strengthening Mechanisms and
Microstructure for an Al-2.6wt.%Li-0.09wt.%Zr
Alloy"
Past
Awards, Honors, Certificates, etc.
Carpenter Technology Corporation Scholarship
(1982)
Phi Eta Sigma National
Honor Society (1981-85)
Tau
Beta Pi National Engineering Honor Society: Elected to the Advisory Board as
Inter-Honorary Council
Representative. (1983-85)
Omicron Delta Kappa Leadership Honor Society
(1985)
Engineer-in-Training (EIT) certificate - State
of
Order of Engineer (1989)
Open Water Scuba Diver Certification (1997)
Sigma Xi, The
Scientific Research Society, (1996-00)
Pi Tau Sigma
Mechanical Engineering Honor Society,
Past
and Current Technical Societies Affiliations, Organizations, and Activities
American Society for Engineering Education, ASEE
(1993-01)
Society for the Advancement of Material and
Process Engineering, SAMPE (1992-01)
American Society for Metals, ASM (1982-01)
American
The American Society of Mechanical Engineers,
ASME (1989-01)
The Minerals, Metals, and Materials Society, TMS
(1999-01)
Ohio University SAMPE student chapter faculty
advisor (1999)
The
American Society for Quality Control, ASQC
(1986)
Private pilot license training (1986-88)
Purdue Student Government, PSG (1992)
Pi Tau Sigma,
The American Welding Society, AWS (1998-01)
The American Institute of Aeronautics and
Astronautics, AIAA (1996-01)
Purdue Society of Professional Engineers, office
assistant (1991-92)
National Society of Professional Engineers, NSPE
(1985-96)
Purdue Society for the Advancement of Material
and Process Engineering, SAMPE, mechanical engineering class representative for
SAMPE (1992-93)
Purdue Outing Exploration Club (1987-88)
Advanced
Advanced Fracture Mechanics |
Numerical Methods in Engineering |
webpages:
www.ent.ohiou.edu/~giridhar/thesis.html
Research
Interests:
Microstructure-
Material Property- Processing - Chemistry - Material Science - Relationships;
This research involves microstructure mechanical property correlation and modeling. The effect of material processing and chemistry/composition on mechanical behavior can be optimized by controlling microstructure. This research involves multilevel or multuscale modeling of a material for the microstructure, macrostructure or grain structure, and crystallographic texture to predict the specific mechanical properties and phenomena such as deformation, strength, ductility, fatigue, fracture toughness. The research would in general involves understanding, defining, and/or determining the relationship between specific material properties to the materials microstructure, the manufacturing and material processing, and the composition. The material processing, for example, includes the solution heat treatment, the aging practice (temp. and time), etc. The manufacturing includes the deformation processing parameters such as the strain rate of deformation, temperature, grain flow, flow stress, type of processing, geometry of the processing, etc. The material behavior during deformation processing is important to include because of the effects on the microstructure. Also, determining the effects of composition variation on the microstructure would be an important consideration in specifying a material property. The alloying could have a strong effect on the crystal structure, microstructure, and phase stability. Developing models and methods to predict the fatigue life, fracture toughness, ductility, and strength is part of the goal of the ongoing research. The properties of a material can be controlled through controlling the internal structure of the material. In order to understand the internal-structure properties relationship of certain materials or alloy systems, both a macroscopic and a microscopic analysis is required. The macrostructure includes parameters such as the grain size, grain size distribution, grain morphology, grain orientation or texture, the fracture mechanisms, grain boundary precipitates, dislocation grain boundary interaction, etc. Some of the microstructure parameters include the particle size, interparticle spacing, the size distribution, the particle morphology, the different chemistries of precipitates in a distribution, grain-boundary precipitates, equilibrium versus nonequilibrium particles, the dislocation-particle interaction mechanisms, shearable versus nonshearable precipitates, etc. An understanding of both the macrostructure and the microstructure is necessary for determining the mechanical behavior of a given material system. A solid mechanics approach from both a microstructural and macrostructural level is required to predict certain materials behavior such as fatigue, fracture, ductility, strength; both the microscopic and the macroscopic deformation mechanisms simultaneously effect the properties. Thus a materials performance can be determined from the given materials design parameters through an understanding of the internal properties structure relationship. This research is applicable to metals and alloys, composites, ceramics, biomaterials, superalloys, polymers, nonmetallic materials, organic materials, etc. Some specific alloys of interest include some aluminum alloys such as alloys Al-Sc-Ti, 2090, 2091, 8090, 8091, 6061, 7075, etc. Other materials of interest for research activities in relating the mechanical behavior to the internal structure include superalloys, aerospace structural alloys, ceramic-matrix composites, automotive alloys and materials, metal-matrix composites, and bioengineering alloys. The current research focus is on microstructure and mechanical properties correlation’s of the more recently developed Al-Li-Cu-Mg-Zr aerospace alloy AF/C-458. The objective of this research activity is to develop optimal thermo-mechanical processing schedules to achieve improved levels of mechanical properties performances for current needs of the aerospace industry. To achieve this, the microstructure is characterized by quantitative microscopy methods, and correlated to the mechanical properties to develop predictive models of microstructure. Thus, the motivation for the research will also be to optimize the microstructure and mechanical behavior of this new lightweight aluminum alloys for primary aerospace systems where isotropic mechanical properties and good ductility, mechanical strength, and fracture toughness are essential.
Teaching
Interests, Philosophy, and Goals
Teaching
Philosophy:
The engineering
teacher must for any given class must challenge and motivate the students to be
creative, resourceful, and ingenious in learning how to solve engineering,
math, and science related problems. The
instructor should provide lectures that challenge and stimulate the students
thinking about engineering problem solving, science, solution approaches, and
related theory. I strive to motivate the
students through class lectures to think independently about solutions
approaches to engineering problems and to utilize their background, knowledge,
and skills to creatively solve engineering problems. I encourage the students to relate what they
are learning in their class studies to real life engineering challenges and
needs by directing them to bridge the gap between the theoretical and experimental. I provide open communication with the
students as a priority to provide an environment that would maximize the
learning of a particular area of engineering or science. I compliment the lecture material with
examples from research and industry.
This gives the students a better appreciation and understanding of the
topic of study.
An important aspect of
teaching engineering is that the students must learn how to solve difficult and
challenging engineering problems both independently as well as in a group. The students must be able to analyze and
develop solutions, approaches, and methods to complex systems. The students must learn to be resourceful in
their various efforts to attain a precise solution to an engineering
problem. The instructor of a class must
provide the students with challenging and interesting engineering problems to
solve. The engineering activities within
the classroom should challenge and stimulate the engineering students to think
in a creative, intuitive, systematic and scientific manner. The students must learn to understand the
basic assumptions and derivations of the theories they apply, and how to apply
those theories to real life engineering situations.
The students must also
develop very good technical writing skills to adequately and accurately provide
a communication for the engineering solution.
This is a very important part of engineering that the results of one
work be concisely and formally written in a complete
manner to express that which must be presented.
The students must also be at times capable of providing good oral
presentations of their work. All of
these activities take practice to improve and become successful. I strive to
include all of these aspects of communication into the engineering courses
through technical report writing, presentations, and group work projects.
The instructor must
also keep his understanding of engineering and science current through
involvement with industry and research labs, attending workshops, conferences,
and seminars, and research activities related to the classes being taught. As an instruction I integrate that which I
have learned through my research and industry activities into the classroom
lectures and course activities to give the students up to date current and new
technology of engineering progress relevant to the goals and objectives of the
particular classes I teach.
Finally the
engineering instructor must be able to relate personally with the students both
in and outside the class in order for the students to feel free to have
communication with the instructor. The
instructor should be involved with engineering student functions,
extra-curricular activities, and recruiting activities. The instructor should communicate with and
mentor the students through office hours, emails, phone conversation, after
class discussion, and laboratory instruction.
There are various engineering student groups that students should be
encouraged to participate such as the American Society of Mechanical Engineers
(ASME), Phi Tau Sigma, American Society for Materials
(ASM), etc. These group help the
students become involved and meet their instructors and other students.
Teaching
Interests for Undergraduate Courses:
Some of the engineering courses that I am interested
in to instruct include statics, dynamics, metal processing, strength of materials,
manufacturing science, mechanical behavior of materials, engineering material
science, heat and mass transfer, numerical methods, engineering economics,
physical metallurgy, process metallurgy, finite element analysis, material
processing, chemistry, and engineering mathematics.
Teaching
interests for Advanced Level Courses:
The courses that I am most qualified to instruct
include the following areas: mechanical behavior of materials, fracture
mechanics and fatigue, solid mechanics and materials, material science and
engineering, dynamics, metallurgical engineering, and applied mathematics.
Mechanical Behavior of Materials - Areas of
interest include advanced stress analysis, mechanical properties and
microstructure, fatigue behavior of metals and alloys, dislocation interactions
in material and effect on properties, and mechanical metallurgy. In addition, I
would be interested in developing courses relating
the
mechanical behavior of materials to the microstructure and processing of
materials.
Solid Mechanics and Materials - Areas of
interest include structure and properties of engineering materials,
statics
and dynamics, fatigue and deformation, strength of materials, elasticity, and
plasticity.
Material Science and Engineering - Topics of
interest include high temperature alloys, composites, ceramics, polymers,
metal-matrix composites, particle strengthened alloys, advanced aluminum
alloys, steel alloys, nickel-aluminum alloys, micromechanisms
in particle strengthened alloys, corrosion engineering, deformation mechanisms
in crystalline solids, and the influence of microstructure on the mechanical
and material properties.
Advanced Engineering Mathematics - Areas of
interest would include advanced calculus, linear analysis, complex algebra,
Fourier series, partial differential equations, ordinary differential
equations, boundary value problems, Laplace
transform, finite difference method, design of experiments, statistical
regression analysis, and numerical methods.
Metallurgical and Chemical Engineering - Areas
of interest include physical metallurgy, process metallurgy, heat and mass
transport phenomena, metallurgical thermodynamics, physics of solids, crystallography and x-ray diffraction, welding metallurgy, foundry
metallurgy, heat treating of alloys, phase diagrams in metallurgy, and
quantitative microscopy analysis.
Manufacturing Science and Metal Processing – The
effect of manufacturing and metal processing parameters on microstructure and
mechanical properties. Metal flow during deformation. Plastic deformation
mechanisms. Anisotropy and
crystallographic texture effect. Areas
of interest include casting, forging, extrusion, rolling, sheet metal forming,
welding.