Loading-direction dependence of interaction types between different twin variants in AZ31 alloy

ABSTRACT

In this research, Loading-direction dependence of interaction types between different $\{10\overline{1}2\}$ twin variants in AZ31 alloy was investigated. The microstructure, twin evolution, and the deformation mechanisms of samples were characterised by quasi-in-situ electron backscatter diffraction. The result showed that during rolling direction (RD)-pre-compression and re-compression, the grains with co-zone twin–twin interaction (Type I) are in the majority, while during RD-pre-compression and transverse direction (TD)-re-compression, the grains with non-cozone twin–twin interaction (Type II) are dominant. Furthermore, the effect of different types of twin–twin interaction on subsequent microstructure evolution is clarified. Our experimental results may provide insights for tailoring different types of twin–twin interaction.

KEYWORDS:

• Magnesium alloys
• tension twinning
• twin–twin interaction
• deformation mechanism
• twin growth
• twin nucleation
• electron backscatter diffraction

Data availability statement

The data presented in our study are available on request from the corresponding author. The data are not publicly available because pertain to a research still in development.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work is financially supported by the Program for Chongqing Talents Exellent Scientist, the Key-Area Research and Development Program of Guangdong Province (2020B010186002), the National Natural Science Foundation of China (52201108) and the Natural Science Foundation of Chongqing (cstc2021jcyj-bshX0114).