Expert Details
Mechanical Properties of Metals
ID: 721754
Ohio, USA
Expert has an extensive background in high temperature materials used in aircraft engines and that used in power plants. He maintains a large data base on these and other materials on the creep-fatigue behavior of materials. Other materials he studied are used in solder joints, aircraft, automobiles, and manufacturing engineering applications.
Expert has been studying metal corrosion issues on aircraft materials and components for the last 11 years. He was a principal investigator on the corrosion evaluation and mechanical properties determination of exposed C/KC 135 tanker aircraft skin materials. Materials he studied are aluminum alloys, steel alloys and titanium alloys.
Expert has been studying the creep and creep fatigue damage mechanisms in materials that were used in such applications as gas turbines, power equipment and other applications. He also studied the creep damage mechanisms under the laboratory test conditions known as low cycle fatigue and creep-fatigue interactions. Some materials studied were SS316, Ti-6Al-4V, MarM002, 1Cr-Mo-V and other superalloy blade and vane materials.
Expert has been working with the metal materials used in a range of applications such as for making valves, chemical running plant equipment, gas turbine components, and aircraft components. He has industrial experience to foresee the application requirements to suggest a material for a particular application.
Most of the work Expert has been doing over the last 15 years is to understand the mechanical behavior of materials. The mechanical behavior include such terms as tensile, fatigue, creep, corrosion, and wear behaviors in order to model the damage growth mechanisms and failure by one of these modes. The materials range from solder alloys, aluminum alloys, titanium alloys, superalloys, steel alloys and other alloys.
In order to generate a material behavi has been very active in conducting mechanical tests. He has performed tensile, hardness, wear, fatigue, creep, corrosion, wear tests and other tests on the full-scale components to determine the material behavior and predict the component life.
Expert's recent work at Cessna Aircraft Company involved conducting failure analysis of aircraft components failed in service or on the test articles while conducting tests. Since the aircraft components are made of a range of materials he has conducted failure analysis on a range of materials being non-ferrous and ferrous metal. His other failure analysis work involve failure analysis if pipes, pipe fittings used in power plants and some gas turbine engine components.
Expert has written extensively on the physics of pitting and how pitting interacts with fatigue. He has developed models to predict the pit growth rates in aluminum alloys and presented models to capture the phase in which a pit changes to a crack. The damage growth rates increase when a crack grows in a corrosion environment.
Participated in a round-robin test effort from the Air Force/Boeing Contract on the corrosion prevention and life assessment of C/KC 135 fleet. Coordinated material testing efforts for Cessna new material characterization and data reduction for the new aircraft programs.Performed failure analysis of test article components and aircraft components from service for failure mode and cause investigation.Updated the data-base and material parameters in the damage tolerance software package, CRACKS-95.Served as a consultant to various corporations such as FASIDE International, ARINC Research Corporation, Boeing Defense and Space Group, etc.
Education
Year | Degree | Subject | Institution |
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Year: 1999 | Degree: Doctor of Science | Subject: Mechanical (Materials) Engineering | Institution: Helsinki University of Technology |
Year: 1986 | Degree: Master of Engineering | Subject: Mechanical (Welding) Engineering | Institution: University of Roorkee, India |
Work History
Years | Employer | Title | Department |
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Years: 2000 to Present | Employer: Undisclosed | Title: Mechanical Engineering | Department: |
Responsibilities:He is a coordinator of the Industry - University cooperation initiative with local area manufacturers, processors and utility companies. This initiative allows him to serve the local industry in fighting fires on a short term basis solving problems in manufacturing, failure analysis, material testing and other areas.He also teaches such courses as Mechanics of Materials and Machine Design to Engineering students. |
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Years | Employer | Title | Department |
Years: 1996 to 2000 | Employer: Cessna Aircraft Company | Title: Engineer | Department: Materials and Processes |
Responsibilities:First two years as Engineer he performed durability and damage tolerance analyses of aircraft components. Used software package such as CRACKS 95 and others and determined crack growth as a function of flight hours. Maintained and updated the database for CRACKS program.The other two years were devoted to the material testing, reducing the data, failure analysis, specification development and/or revisions, manufacturing issues and other fire fighting issues. |
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Years | Employer | Title | Department |
Years: 1992 to 1996 | Employer: University of Utah | Title: Mechanical Engineering | Department: |
Responsibilities:Developed funded research work in the corrosion prevention and life extension issues of aircraft fleet. Low cycle fatigue and creep-fatigue interaction studies of steel and superalloys. General fatigue studies and material selection and testing. |
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Years | Employer | Title | Department |
Years: 1989 to 1992 | Employer: University of Wollongong, Australia and Open University, England | Title: Research Assistant | Department: Materials Engineering |
Responsibilities:Performed research in the area of creep-fatigue interactions and life prediction of low alloy steels. |
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Years | Employer | Title | Department |
Years: 1986 to 1989 | Employer: Gas Turbine Research Establishment | Title: Research Scientist | Department: Materials and Structures |
Responsibilities:Materials Testing Laboratory. Involved in the testing of new materials for gas turbine engine development program, performed full scale fatigue tests to assess the life. |
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Years | Employer | Title | Department |
Years: 1983 to 1984 | Employer: Orient Paper Mills Ltd | Title: Chemical Recovery Plant | Department: |
Responsibilities:In-plant maintenance of chemical running plant such as pumps, pipe-lines, evaporators, etc. |
Government Experience
Years | Agency | Role | Description |
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Years: 1994 to 1995 | Agency: Air Force Office of Scientific Research | Role: Co-Principal Investigator | Description: Conducting contract reserarch on the effect of fretting corrosion and pitting corrosion on the structural integrity of aircraft structure. |
International Experience
Years | Country / Region | Summary |
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Years: 1986 to 1989 | Country / Region: India | Summary: Research on the material testing, full scale component testing, thermal shock, bird ingestion, spin pit tests and life assessment of turbine materials and components. |
Years: 1989 to 1991 | Country / Region: Australia | Summary: Performed research on the grain size and defect documentation of thick rolled plates. Performed failure analysis of power plant pipe-lines. Conducted resarch in the low cycle fatigue and creep-fatigue life prediction. |
Years: 1991 to 1992 | Country / Region: England | Summary: Performed research on the development and assessment of creep-fatigue life prediction models. Interacted with R&D Labs. |
Years: 1999 to 2000 | Country / Region: Finland | Summary: Performed research on the high temperature fatigue. Interacted with Industry |
Years: 1992 to 2000 | Country / Region: Japan and Holland | Summary: Visited IHI Research Institute in Tokyo and presented seminars (1992). Visited Nattional Research Laboratory in Amsterdam and conducted research on the durability of bondcoat systems. |
Career Accomplishments
Associations / Societies |
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ASME, ASTM, TMS, IAAA |
Professional Appointments |
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Associate Editor of High Temperature Materials and Processes an International Journal |
Publications and Patents Summary |
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He has over 75 publications in various journals, and conferences. Additionally, he has authered over 75 reports while at Cessna Aircraft Company. |
Additional Experience
Training / Seminars |
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Failure analysis of metals and non-metal components. Light weight materials. Life assessment methods Metal joining |
Vendor Selection |
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Expert has experience selecting vendors for material testing, specific welding processes, and coating. |
Language Skills
Language | Proficiency |
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Hindi | |
Bengali |
Fields of Expertise
aluminum material selection, materials selection, metal corrosion, metal creep, metal material selection, metal mechanical behavior, metal testing, nonferrous metal failure analysis, pitting, welding, corrosion rate, aircraft corrosion, corrosion fatigue, metal nondestructive testing, metal deformation, automobile corrosion, aircraft wing, dissimilar material welding, metal forming analysis, corrosion, metal welding, airframe, automatic welding, stress corrosion, metal chemical analysis, metal mechanical property, localized corrosion, fusion welding, fretting corrosion, arc welding