q3s03 - is made of a. fracture strength b. UTS c. 0.2%...

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Home Introduction Policies Resources Requirements & Grading Syllabus Assignments Handouts Discussion Web Links Distance Learners Contact MSE 200 Quiz MSE 200 1. The true stress-true strain and engineering stress-engineering strain
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graphs are very much different a. up to and below yield point b. above yield point c. above UTS 2. Serrated yielding is observed in the stress-strain graphs of a. aluminum b. iron with carbon c. zinc 3. Power hardening equation is valid for the a. elastic region in the true stress-true strain graph b. plastic region in the engineering stress-engineering strain graph c. plastic region in the true stress-true strain graph 4. Upon unloading a sample from the stress applied beyond yield, the strain remaining is a. total strain b. elastic strain c. plastic strain 5. Work hardening is a result of plastic deformation by a. single slip system b. multiple slip system c. movement of dislocations 6. For comparison of nonferrous and ferrous alloys in the design, use
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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)[011] c. (1-10)[111] 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.

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q3s03 - is made of a. fracture strength b. UTS c. 0.2%...

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