The effect of stacking-fault energy upon deformation twin thickness in Cu–Al alloys subjected to plastic deformation was investigated. Under the same deformation conditions, the deformation twin thickness in Cu–Al alloys decreased monotonically with a reduction in stacking-fault energy. For the same alloy, the twin thickness became smaller when the sample was deformed at higher strain rates and lower temperatures. The variation of twin thickness was analyzed in terms of nucleation and growth kinetics of twins during plastic deformation.

Effect of Stacking-Fault Energy on Deformation Twin Thickness in Cu–Al Alloys. Y.Zhang, N.R.Tao, K.Lu: Scripta Materialia, 2009, 60[4], 211-3