Q:
In FCC crystals the a/2*[110] unit dislocations can dissociate to produce a ribbon of stacking fault. Which among the following is as an example of the same?
Answer & Explanation
Answer: A) a/2*[110]->a/6*[121] + a/6[211]
Explanation: a/2*[110]->a/6*[121] + a/6*[211] is an example and this gives a stacking fault on (111) separated by two Shockley partials. Since the stacking fault is in effect four close-packed layers of hcp crystal, it can act as a very potent nucleation site for an hcp precipitate.
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