Mechanical Property Characterization and Modeling of Structural Materials.
Abstract
A Comprehensive research and development program was conducted to investigate crack-growth behavior, to develop predictive models of crack-growth rates, and to generate data on mechanical properties on engine-disk materials at room and elevated temperatures. The program consisted of three concurrent tasks: Research on crack-growth behavior; Experimental investigations for determination of mechanical properties and reliability of structural materials; and Development, upgrading, and maintenance of the AFWAL Mechanical Test Facility. In the first of these tasks, fundamental research was conducted on the crack-growth behavior of engine-disk nickel-base superalloys operating in the temperature range 538-760 C. Specific experimental and analytical research consisted of the effects of sustained load upon crack growth, crack growth in deleterious environments, and crack initiation and growth of short cracks. Crack-growth-rate models were developed based upon experimental results and upon analytical characterization of fundamental processes which occur during crack growth. In the second task extensive mechanical-property data were generated as required by on-going AFWAL programs. The tests included uniaxial tension, compression, bend, creep fatigue, low-cycle fatigue, crack initiation, sustained-load crack growth, and fatigue-crack growth. The materials which were tested included nickel-base superalloys, titanium, aluminum, and other structural materials.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1982
- Accession Number
- ADA113841
Entities
People
- Bhaskar Majumdar
- Henry L. Bernstein
- Jalees Ahmad
- Noel E. Ashbaugh