期刊
MATERIALS LETTERS
卷 117, 期 -, 页码 45-48出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2013.11.094
关键词
Phase transformation; Mechanical properties; Mg-Li alloys
资金
- NSFC [51101142, 50821001, 51102206]
- New Century Excellent Talents in University of Ministry of Education of China [NCET-12-0690]
- Heibei province scientific program [13961002D, Y2012019]
The effect of superhigh pressure (4 GPa) on phase transformation behavior and mechanical properties of a duplex phase Mg-7 wt%Li alloy has been investigated in the temperature range from 450 to 1150 degrees C. Hardness and tensile strength of Mg-7 wt%Li alloy have been significantly improved by super-high pressure treatment at 700 degrees C for 120 min. The microstructural observation is confirmed that super-high pressure is of benefit for phase transformations from bcc-Li3Mg7 to hcp phases and hcp-Li3Mg17 to hcp-Li0.92Mg4.08. The improved mechanical properties are mainly associated with the reduction of bcc-Li3Mg7 phase and the formation of {1 0 -1 1) compression twirls in hcp-Li0.92Mg4.08 phase. (C) 2013 Elsevier By. All rights reserved.
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