期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 69, 期 -, 页码 20-31出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2020.06.050
关键词
AZ31; Square bar; Torsion; Twin; Texture; Anisotropy
资金
- National Natural Science Foundation of China [51601154]
- Fundamental Research Funds for the Central Universities [XDJK2019B003]
This study found that reciprocating torsion can enhance yield strength in three compressive directions simultaneously, and reduce compressive anisotropy. Reciprocating torsion generates profuse dislocations and {10-12} twin boundaries to harden the micro-hardness and yield strength.
In this study, a rolled AZ31 bar with square section was used. The reciprocating torsion was performed to maintain the shape of the sample. The microstructure evolution of AZ31 bar during torsion and its influence on compressive anisotropy were investigated in detail. Results showed that reciprocating torsion can simultaneously enhance yield strength in three compressive directions, and reduce compressive anisotropy. Reciprocating torsion generated profuse dislocations and {10-12} twin boundaries to harden the micro-hardness and yield strength. Reciprocating torsion can also generate new texture component which is mainly from the orientation of newly generated {10-12} twins. The new twin-structures will be responsible for the reduction in compressive anisotropy. Moreover, uneven deformation features in twisted sample were systematically investigated. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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