Transmutation of Basal Dislocations by $$ \{ 1\,0\,{\bar{\text{1}}\,\text{2}}\} $$ Twinning in Magnesium

摘要: Basal dislocations in hexagonal close-packed materials remarkably can enhance the mobility of \( \{ 10{\bar{\text{1}}\text{2}}\} \) twin boundaries which absorb them. This behavior has been extensively studied and leads to complex faceting, disclination content, mobile disconnections. However, we recently uncovered that under loading suppresses mobility, certain basal punch through boundary, generating \left\langle {c + a} \right\rangle inside twin. The transmutation requires two mixed move into boundary produces a dislocation on prismatic plane along with twinning disconnection. reaction is nearly identical one predicted decades ago by Price. both stress temperature sensitive depends heavily faceting reactions at boundary. By studying dependence versus absorption upon have general new insights showing how interfaces react dislocations.