Question: A cylindrical copper single crystal, oriented along the [ 1 2 3 ] - direction, is deformed in tension. a ) What shape change do

A cylindrical copper single crystal, oriented along the [123]-direction, is deformed in tension.
a) What shape change do you expect (Hint: in fcc crystals deformation takes place on {111}-
planes)?
b) What change would you expect, if the single crystal is replaced by a polycrystal?

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