Question: Part 1: [5 marks] A structural component in the form of a wide plate is to be fabricated from a steel alloy that has

Part 1: [5 marks] A structural component in the form of a wide plate is to be fabricated from a steel alloy that has a plane strain fracture toughness of 77.0 MPam and a yield strength of 1400 MPa. The flaw size resolution limit of the flaw detection apparatus is 4.0 mm. If the design stress is one half of the yield strength and the value of Y is 1.0. Determine whether or not a critical flaw for this plate is subject to detection. Part 2: [8 marks] For some metal alloy, a true stress of 415 MPa (60,175 psi) produces a plastic true strain of 0.475. How much will a specimen of this material elongate when a true stress of 325 MPa (46,125 psi) is applied if the original length is 300 mm (11.8 in.)? Assume a value of 0.25 for the strain- hardening exponent n. Part 3: [2 marks] For the following, indicate which will be more ductile, and provide a brief (one sentence) explanation as to why? Pure copper solidified at 900 C, or pure copper solidified at 600 C

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