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: B- For an Aluminum alloy the plastic deformation is described by the equation: 0; = Kɛ, where K= 680 MPa and n= 0.17. Calculate the off-set yield stress at 0.2% strain and the engineering stress at ε = 0.15. Hint: your answer should include small and large strains. C- When a tensile specimen is stretched in the plastic region to an engineering strain of 0.2, calculate the amount of cold work percent.

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explanation:

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