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Abstract Specifically oriented Mg single crystals, aligned for c-axis extension, were deformed in channel-die plane strain compression in order to form { 10 1 ¯ 2 } extension twins. The… Click to show full abstract
Abstract Specifically oriented Mg single crystals, aligned for c-axis extension, were deformed in channel-die plane strain compression in order to form { 10 1 ¯ 2 } extension twins. The amount of twinning shear for { 10 1 ¯ 2 } twins was determined directly from the deflection of marker lines to be s = 0.126 , in excellent agreement with the theoretical value. The twinning shear was discussed with respect to the shear-coupled grain boundary migration by analyzing the formal dislocation content of { 10 1 ¯ 2 } twin boundaries. The respective boundary migration – shear coupling factor is proposed to result from a combination of two elementary coupling modes, 〈 10 1 ¯ 0 〉 and [ 0001 ] .
Journal Title: Acta Materialia
Year Published: 2017
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