期刊
MATERIALS LETTERS
卷 113, 期 -, 页码 206-209出版社
ELSEVIER
DOI: 10.1016/j.matlet.2013.09.054
关键词
Friction stir processing (FSP); Microstructure; Refinement; Particles; Long period stacking ordered (LPSO) phase
资金
- Shanghai Phospherus Program [11QH1401200]
- Program for New Century Excellent Talents in University of Ministry of Education of China [NCET-11-0329]
The effect of friction stir processing (FSP) on the modification of microstructure and mechanical properties of Mg-14Gd-23Zn-0.6Zr (wt%) alloy has been investigated. The coarse long period stacking ordered (LPSO) phase at grain boundary in the alloy was successfully broken into fine particles (similar to 1 mu m) due to the complicated deformation beneath the shoulder and around the pin. The grain size was also significantly refined from 23 +/- 4 mu m to 1.6 +/- 0.3 mu m through dynamic recrystallization (DRX) during FSP. Yield strength of the FSP sample was increased by similar to 30% probably due to the grain size and LPSO phase refinement as well as fine precipitation around the LPSO phase while the elongation decreased by similar to 39% maybe because of the heterogeneous microstructure. (C) 2013 Elsevier B.V. All rights reserved.
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