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Unformatted text preview: is made of a. fracture strength b. UTS c. 0.2% offset yield strength 7. A slip system in fcc metals is (with negative sign taken as a bar over it) a. (111)[1-10] b.(111) c. (1-10) 8. The reasons that bcc metals are strong and ductile are a. large number of slip systems and low CRSS b. small number of slip system and low CRSS c. large number of slip systems with high CRSS 9. Schmid's law states that slip takes place when a. CRSS is low b. CRSS>RSS c. CRSS=RSS 10. For the observable plastic strain that the metals undergo, the dislocation density (cm/cm 3 ) should be a. 10 6 b. 10 8 c. 10 13 11. Bonus question A critical component in the design of a structure should always be chosen with a material that shows a. large area under the stress-strain curve b. large fracture strength C. large elongation. Answers: 1(b) 2(b) 3.(c) 4. (c) 5. (b) 6. (c) 7. (a) 8. (c) 9. (c) 10. (c) 11.(a)...
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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