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Unformatted text preview: 7. Fatigue resistance of a material is better in an environment of a. oxygen b. moisture c. vacuum ( c) 8. A heavily cold worked metal is a. isotropic b. anisotropic c. equiaxed (b ) 9. The alternating stress for failure of a specimen under fatigue as a function of increasing mean stress on the specimen a. decreases b. increases c. remains constant (a ) 10. Major changes in a property take place during a. recovery b. grain growth c. recrystallization (c ) Choose the materials for the given application (Bonus question) a. Steel with nitrogen ion implanted on the surface Turbine parts (b) b. Nickel alloy dispersed with thorium oxide particles Axles for heavy trucks (a ) c. Carburized and quenched high speed steel Critical pin in a heavy crane (d) d. High alloy steel Tool to machine aluminum (c )...
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This note was uploaded on 10/11/2009 for the course MSE 200 taught by Professor Wholedepartment during the Spring '08 term at N.C. State.
- Spring '08