期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 579, 期 -, 页码 92-99出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2013.05.064
关键词
Magnesium alloys; Mg-3Sn-2Sr alloy; Ti addition; SrMgSn phase
资金
- Chongqing Science and Technology Commission in China [2011ggB50013, 2011jjA50019, 2011AC4119]
- Chongqing Education Commission in China [KJ120834]
- Key Laboratory of Manufacture and Test Techniques for Automobile Parts (Chongqing University of Technology)
- Ministry of Education
In this paper, the effects of minor Ti addition (0.1-0.3 wt.%) on the as-cast microstructure and mechanical properties of Mg-3Sn-2Sr (wt.%) magnesium alloy are investigated. The results indicate that the Mg-3Sn- 2Sr alloy is mainly composed of alpha-Mg, primary and eutectic SrMgSn, and Mg2Sn (with small amount) phases. After the additions of 0.1-0.3 wt.% Ti to the Mg-3Sn-2Sr alloy, the formation of the primary and eutectic SrMgSn phases is suppressed and promoted, respectively. At the same time, the coarse needle-like primary SrMgSn phases are modified and/or refined, and the primary grains are also effectively refined. However, an increase in Ti amount from 0.1 wt.% to 0.3 wt.% does not have obvious effect on the primary grain size of the Ti-containing alloys. In addition, the additions of 0.1-0.3 wt.% Ti to the Mg-3Sn-2Sr alloy can simultaneously improve the tensile and creep properties of the alloy. However, an increase in Ti amount from 0.1 wt.% to 0.3 wt.% does not have obvious effects on the tensile and creep properties of the Ti-containing alloys. (C) 2013 Elsevier B.V. All rights reserved.
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