1.

The slip in FCC crystal occurs in the (111) plane in {110} direction, but generally it is not energetically favourable, so it slips into two partial dislocations. The correct partial dislocation is represented by which of the following equation?

A. a<sub>o</sub>/2[1 1 0] a<sub>o</sub>/3[-1 2 1]+a<sub>o</sub>/2[112]
B. a<sub>o</sub>/2[1 1 0] a<sub>o</sub>/6[-1 2 1]+a<sub>o</sub>/6[112]
C. a<sub>o</sub>/2[1 1 0] a<sub>o</sub>/6[2 -1 -1]+a<sub>o</sub>/2[11-2]
D. a<sub>o</sub>[1 1 0] a<sub>o</sub>/3[-1 2 1]+a<sub>o</sub>/2[112]
Answer» D. a<sub>o</sub>[1 1 0] a<sub>o</sub>/3[-1 2 1]+a<sub>o</sub>/2[112]


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