期刊
SCRIPTA MATERIALIA
卷 172, 期 -, 页码 93-97出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2019.07.012
关键词
Mg-alloys; Orientation dependence; Strengthening; Dislocation; Single crystal
类别
资金
- Japan Society for the Promotion of Science (JSPS) KAKENHI [JP18H01736, JP18H05478, JP18H05254]
Strong orientation dependence of yield stress was found in a body-centered cubic (bcc)-structured Mg-Li alloy single crystal by adding 5 at.% of Al combined with rapid quenching, which was negligible in Mg-Li binary single crystals. Furthermore, the addition of 5 at.% of Al combined with rapid quenching caused an extreme increase in yield stress up to similar to 470 MPa; this compares to similar to 50 MPa in a Mg-Li binary crystal. Increased valence-electron to atom ratio and development of chemical modulation in the alloy by Al-addition are probable causes of the enhancement of plastic anisotropy and the drastic increase in yield stress, respectively. (C) 2019 Published by Elsevier Ltd on behalf of Acta Materialia Inc.
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