Details

Autor(en) / Beteiligte

• Nakano, Hiromi
• Yuasa, Motohiro
• Chino, Yasumasa
• Mabuchi, Mamoru

Titel

bf\left\{ {10\bar 12} \right\}$ twins in the rolled Mg–Zn–Ca alloy with high formability

Ist Teil von

• Journal of materials research, 2014-12, Vol.29 (24), p.3024-3031

Ort / Verlag

New York, USA: Cambridge University Press

Erscheinungsjahr

2014

Quelle

SpringerLink

Beschreibungen/Notizen

• Hot-rolled Mg–Zn–Ca alloy, followed by annealing, shows high formability at room temperature because of the reduced intensity of the basal texture. [Y. Chino et al., Mater. Trans. 51, 818 (2010).] In the present work, microstructures of the as-rolled Mg–Zn–Ca alloy were investigated using electron backscattered secondary diffraction and transmission electron microscopy. In addition, first-principles calculations were performed to investigate the twinnability of the Mg–Zn–Ca alloy. The microstructural investigations revealed that fine $\left\{ {10\bar 12} \right\}$ twins and local fine-grained microstructures were formed. It is therefore suggested that the fine twins induce this local fine-grained microstructure, which become the nuclei for recrystallization during annealing. As a result, the intensity of the basal texture is reduced. Calculations revealed that the $\left\{ {10\bar 12} \right\}$ twinnability is enhanced by the addition of Ca because of the increased unstable stacking fault energy (γus) and decreased unstable twin fault energy (γut).