ME 2733 Chapter : HW6 Solutions
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7. 21 hexagonal close packed metals are typically more brittle than fcc and bcc metals because there are fewer slip systems in hcp. 7. 22 these three strengthening mechanisms are described in sections 7. 8, 7. 9, and 7. 10. 7. 24 we are asked to determine the grain diameter for an iron which will give a yield strength of. The best way to solve this problem is to first establish two simultaneous expressions of equation (7. 5), solve for . , and finally determine the value of d when and k o y. The data pertaining to this problem may be tabulated as follows: y y. 135 o o (4. 47) k y (11. 18) k y. Mpa which gives d = 1. 47 x 10. 7. 29 we are given the original and deformed cross-sectional dimensions for two specimens of the same metal, and are then asked to determine which is the hardest after deformation.
