Question: (a) From the plot of yield strength versus (grain diameter)-1/2 for a 70 Cu-30 Zn cartridge brass in Figure 7.15, determine values for the constants

(a) From the plot of yield strength versus (grain diameter)-1/2 for a 70 Cu-30 Zn cartridge brass in Figure 7.15, determine values for the constants σ0 and ky in Equation 7.7.

(b) Now predict the yield strength of this alloy when the average grain diameter is 2.0 × 10-3 mm.

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