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11. Two samples of an annealed Ni alloy with an initial rectangular cross section of 13 mm x 10 mm are reduced to a final cross section of 14 mm x 8 mm via two different processing sequences as follows. Sample 1: Annealed alloy is first cold rolled to the final cross section at room temperature and then heat treated in an appropriate T6 condition (i.e. Solid solutioned + Quenched + Aged). Sample 2: Annealed alloy is first heat treated in an appropriate T6 condition (i.e. Solid solutioned + Quenched + Aged) and then cold rolled to the final cross section at room temperature. (a) Will both the samples 1 and 2 have the same strength and ductility after the final processing? If No, which one will be stronger and which one more ductile? Cite your reasons for your chosen answer. (3 marks) (b) Which strengthening mechanisms are effective in sample 1 and sample 2? Briefly explain the strengthening mechanism/s in this material. (3 marks) 12. (a) Show schematically Population Vs Strength distribution for a typical ceramic material and a ductile metal. What would be the reasons for the difference in the shape of the plot for both materials? (3 Marks) (b) Show the changes by plotting Population Vs Strength distribution curves of a ceramic material when the fracture toughness of the ceramic material is increased while keeping flaw size and its distribution the same. How will the reliability of this material (remain the same, increase, or decrease?) after the fracture toughness increment? Cite your reasons. (4 Marks)

11. Two samples of an annealed Ni alloy with an initial rectangular cross section of 13 mm x 10 mm are reduced to a final cross section of 14 mm x 8 mm via two different processing sequences as follows. Sample 1: Annealed alloy is first cold rolled to the final cross section at room temperature and then heat treated in an appropriate T6 condition (i.e. Solid solutioned + Quenched + Aged). Sample 2: Annealed alloy is first heat treated in an appropriate T6 condition (i.e. Solid solutioned + Quenched + Aged) and then cold rolled to the final cross section at room temperature. (a) Will both the samples 1 and 2 have the same strength and ductility after the final processing? If No, which one will be stronger and which one more ductile? Cite your reasons for your chosen answer. (3 marks) (b) Which strengthening mechanisms are effective in sample 1 and sample 2? Briefly explain the strengthening mechanism/s in this material. (3 marks)

12. (a) Show schematically Population Vs Strength distribution for a typical ceramic material and a ductile metal. What would be the reasons for the difference in the shape of the plot for both materials? (3 Marks)
(b) Show the changes by plotting Population Vs Strength distribution curves of a ceramic material when the fracture toughness of the ceramic material is increased while keeping flaw size and its distribution the same. How will the reliability of this material (remain the same, increase, or decrease?) after the fracture toughness increment? Cite your reasons. (4 Marks)

11 two samples of an annealed ni alloy with an initial rectangular cross section of 13 mm x 10 mm is reduced to a final cross section of 14 mm x 8 mm via two different processing sequences a 39709

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