ENGR302Wk4-2

ENGR302Wk4-2 - California National University ENGR 302...

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California National University ENGR 302 Kathryn Toth Week #4 Assignment #2 3/14/2011
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Chapter 7 Questions: 7.2) When an edge dislocation occurs, the edge dislocation line moves along the slip plane and ends up creating a step on the edge of the slip plane. If you have two dislocations with opposite sign and they align with each other, they will basically just cancel each other out and create another atomic distance in that plane of the crystal. 7.12) Normal of slip plane = 60 ° = ϕ Slip direction = 35 ° = λ Critical resolved shear stress = 900psi = τcrss Applied Stress ( ) σ of 1750psi cause the crystal to yield? = τ σ cosλ cosϕ = (1750psi) cos (35 °) ( °) cos 60 = 716.8psi < τcrss Therefore, No the applied stress would not cause yield . τcrss = 900psi = σy cos λcosϕ = σy cos ° ( °) 35 cos 60 = σy (0.41) σy = 900psi/0.41 = 2197psi 7.19) Four major differences between deformation by twinning and deformation by slip relative to mechanism, conditions of occurrence, and final results. #1.
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This note was uploaded on 03/18/2011 for the course ENGR 302 taught by Professor Clausson during the Spring '11 term at CNUAS.

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ENGR302Wk4-2 - California National University ENGR 302...

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