(c)For fcc and bcc metals, there are different temperature dependence on the flow stress components, as shown in Figs. 6 and 7. Use the Considere's criterion to explain the reasons that cause this difference. (10%)

(d) In fec metals, the dislocations are usually dissociated into an extended dislocation, containing two partial dislocations and a stacking fault. Fig. 2 shows an extended dislocation in fcc lattice. Describe the position of the partial dislocation including the direction of dislocation line and Burgers vectors. (5%)

題組內容

(c)For fcc and bcc metals, there are different temperature dependence on the flow stress components, as shown in Figs. 6 and 7. Use the Considere's criterion to explain the reasons that cause this difference. (10%)

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