期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2017.11.021
关键词
{10-12} - {10-12} twin laminas; AZ31 Mg alloy; Twinning; Detwinning; Fracture
类别
资金
- National Natural Science Foundation of China [51671040, 50890170, 51421001]
- National Basic Research Program of China [2010CB631004]
The typical fracture morphology of the Mg-3Al-1Zn alloy after cyclic deformation was investigated using optical microscopy (OM), and an electron back-scatter diffraction (EBSD). A novel finding of this study is that large number of stripe-like laminas were found within the primary {10 (1) over bar2} tensile twins in the crack initiation and crack propagation regions. It is shown that these laminas primarily result from {10 (1) over bar2} - {10 (1) over bar2} twinning during cyclic deformation. According to the results and combined with theoretical analysis, the formation of {10 (1) over bar2} - {10 (1) over bar2} twins are largely contributing to the local strain accommodation caused by different twin variants.
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