Abstract
Mg single crystals most favourably oriented for prismatic slip were subjected to plane strain compression at room and elevated (200 and 370 °C) temperatures. At room temperature deformation was accommodated by cooperative {101¯2} extension and {101¯1} contraction twinning, occurring in a combined fashion, instead of prismatic slip. At higher strains deformation was found to localize within contraction twin bands that underwent dynamic recrystallization. Such bands were also revealed to be crack initiation sites due to extensive localized shear. Prismatic slip was activated at elevated temperatures (above 200 °C) only, although being geometrically favored.
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