Consider the tensile stress strain diagrams in Figure labeled 1 and 2. These diagrams are...

Consider the tensile stress strain diagrams in Figure labeled 1 and 2. These diagrams are typical of metals. Answer the following questions, and consider each part as a separate question that has no relationship to previous parts of the question.

(a) Samples 1 and 2 are identical except for the grain size. Which sample has the smaller grains? How do you know?

(b) Samples 1 and 2 are identical except that they were tested at different temperatures. Which was tested at the lower temperature? How do you know?

(c) Samples 1 and 2 are different materials. Which sample is tougher? Explain.

(d) Samples 1 and 2 are identical except that one of them is a pure metal and the other has a small percentage alloying addition. Which sample has been alloyed? How do you know?

(e) Given the stress strain curves for materials 1 and 2, which material has the lower hardness value on the Brinell hardness scale? How do you know?

(f) Are the stress strain curves shown true stress strain or engineering stress strain curves? How do you know?

(g) Which of the two materials represented by samples 1 and 2 would exhibit a higher shear yield strength? How do you know?