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7. The graphs (P1-P7) below represent interatomic interaction, mechanical properties, and failure of materials under different service conditions. (18 marks) P1 P2 P3 t iv vi P4 P5 P6 ix vii viii P7 to A. Name the failure mechanism associated with the following curves: (2 marks each, total = 8) Mechanism P3(vi) P4(vii) ? P5(viii) 3 P6(ix) B. Match the graph (P1, P4, PS, P.) shown above with the type of testing methods shown below (choose a method from 1-4). (1 mark each, total - 4 P1(-): P4(vii): P5(viii): PG[ix): 1 2 - 3 Load chamber C. Identify the fracture pattern(s) below corresponding to P1(1).P1(), and P3(v) in the graphs above (choose images from 1-3 shown below, multiple answers possible). (3) P1M): 0 P1(1): P3(vi): 1 2 2 3 ma (continued) 10/16 D. Identify the crystal structure corresponding to P3(vi), P4(vil), and PS(vi) in graphs above. (3) P3(vi): P4(vii): P5(viii)