Abstract
In this study, extension twinning nucleation and growth of extruded ZC61 alloy were investigated using a quasi-in-situ electron backscatter diffraction method during interrupted dynamic compression along the extrusion direction. The experimental results show that 63.2% of extension twinning nucleation behavior satisfies the Schmid law during high strain-rate compression. Furthermore, the nucleation of twins and selection of twin variants are influenced by the strain accommodation factor. Non-Schmid twin variants have the highest m' and active twinning systems of neighboring grains can be activated in the same twin variant form. In addition, prismatic and pyramidal slips in neighboring grains play a positive role in low SF twin nucleation.
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