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Expert Details

Mechanical Properties of Metals

ID: 721754 Ohio, USA

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Expert has studied aluminum alloys from the 2xxx, 5xxx, 6xxx and 7xxx series and studied their grain size, tensile properties, heat treatments, corrosion resistance, and fatigue behavior (both room temperature stress - life (S-N) and crack growth behavior). His work is also in the area of selecting new aluminum alloy materials for applications in aircraft.

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.


Year Degree Subject Institution
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
Years: 2000 to Present Employer: Undisclosed Title: Mechanical Engineering Department:
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.
Years Employer Title Department
Years: 1996 to 2000 Employer: Cessna Aircraft Company Title: Engineer Department: Materials and Processes
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.
Years Employer Title Department
Years: 1992 to 1996 Employer: University of Utah Title: Mechanical Engineering Department:
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.
Years Employer Title Department
Years: 1989 to 1992 Employer: University of Wollongong, Australia and Open University, England Title: Research Assistant Department: Materials Engineering
Performed research in the area of creep-fatigue interactions and life prediction of low alloy steels.
Years Employer Title Department
Years: 1986 to 1989 Employer: Gas Turbine Research Establishment Title: Research Scientist Department: Materials and Structures
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.
Years Employer Title Department
Years: 1983 to 1984 Employer: Orient Paper Mills Ltd Title: Chemical Recovery Plant Department:
In-plant maintenance of chemical running plant such as pumps, pipe-lines, evaporators, etc.

Government Experience

Years Agency Role Description
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
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
Professional Appointments
Associate Editor of High Temperature Materials and Processes an International Journal
Publications and Patents Summary
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
Failure analysis of metals and non-metal components.
Light weight materials.
Life assessment methods
Metal joining
Vendor Selection
Expert has experience selecting vendors for material testing,
specific welding processes, and coating.

Language Skills

Language Proficiency

Fields of Expertise

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