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2. Consider a single crystal nickel oriented such that a tensile stress is applied along a [001] direction. If slip occurs on a (111) plane and in a [701] direction, and is initiated at an applied tensile stress of 20 MPa, compute the critical resolved shear stress (5 points): 1. A cylindrical specimen of a brass alloy 10 mm in diameter and 100 mm long is tested under tension with a force of 10,500 N. The tensile stress-strain behavior is shown as below (5 points): 500 70 Tensile strength 450 MP165.000 poll 60 400 50 10 300 MP40 40 Stress Mal 200 30 Stres (10) 200 Yield strength 250 MPa (36,000 paid 30 20 100 20 10 100 10 0 0.005 0.10 0.20 0.80 10 0.40 Strain (a) Compute the final length of the specimen after releasing the force (2 points). (b) Determine the strain state (elastic or plastic?) and estimate the final length of the specimen when the load is increased to 25,000 N and then released (3 points)