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The two figures below represent the deformation mechanism maps for pure work-hardened nickel containing different grain sizes. Questions: a) Label the different regions on each figure based on known creep deformation mechanisms. b) Which material A or B is more likely to be more creep resistant at high temperature? Explain. c) What are the predicted strains & in materials A and B, respectively, after 10,000 hours at a shear stress of t = 1 MPa and a temperature of 600°C? Explain the difference. Material A: T("C) -2000 200 400 600 800 1000 1200 1400 10-1 Pure nickel Grain size 0.1 mm 10-2 Work-hardened 1 = 100 MN m 2 10-3 בופ t = 10 MN m 2 10-4 7 = 1 MN m 2 10-5 10-10 110-8 t = 0.1 MN m 2 - 10-6 0 --+- 0.2 0.4 0.8 1.0 0.6 TIT Material B: T(°C) -2000 200 400 600 800 1000 1200 1400 10-1 Pure nickel Grain size 0.01 mm 10-2 Work-hardened T = 100 MN m 2 10-3 /G S T = 10 MN m 2 104 + 1 = 1 MN m 2 1 10-5 10-6 t = 0.1 MN m 2 10-10 10-8 2+ 10-6 0.2 0.4 0.6 0.8 1.0