MECHANICAL PROPERTIES AND PRECIPITATION BEHAVIORS OF Mg-Al-Sn and Mg-Zn-Sn ALLOYS

被引：0
|
作者：
Konno, Toyohiko J. [1 ]
Lee, JongBeom [1 ,2 ]
Ohya, Takahiro [1 ,2 ]
Son, HyeonTaek [3 ]
Jeong, Haguk [4 ]
机构：
[1] Tohoku Univ, Inst Mat Res, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan
[2] Tohoku Univ, Grad Sch, Dept Mat Sci, Aoba Ku, Sendai, Miyagi 9808579, Japan
[3] Korea Inst Ind Technol, Gwangju 500480, South Korea
[4] Korea Inst Ind Technol, Incheon 464130, South Korea
来源：
TMS 2010 139TH ANNUAL MEETING & EXHIBITION - SUPPLEMENTAL PROCEEDINGS, VOL 3: GENERAL PAPER SELECTIONS | 2010年
关键词：
Magnesium alloy; Precipitation; Age-hardening; Transmission Electron Microscopy;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have examined mechanical properties and precipitation behaviors of Mg-Al-Sn and Mg-Zn-Sn systems in order to develop low-cost Mg-based alloys. For the Mg-Al-Sn alloys, the ultimate strength (UTS) of an extruded Mg-9wt%Al-2wt%Sn alloy reached 390MPa. TEM observation indicated that plate-like Mg17Al12 precipitates having Burgers orientation relationship with the matrix are responsible for the strength. This alloy also exhibits an age hardening behavior: the peak hardness appears after 15-20 hrs of heat treatment at 473K. On the other hand, the UTS of the Mg-Zn-Sn alloys are on the order of 300MPa. The precipitates in these alloys are composed of the Mg2Sn and MgZn2 particles. It was found that these phases often precipitate together, suggesting that the MgZn2 phase can act as a nucleation sites for Mg2Sn.
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页码：145 / +
页数：2
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