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Improving mechanical properties and corrosion resistance

已有 3998 次阅读 2012-10-23 20:52 |个人分类:非晶前沿|系统分类:论文交流| alloy, magnesium

Improving mechanical properties and corrosion resistance of Mg-6Zn-Mn magnesium alloy by rapid solidification


  • a College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
  • b National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China
  • c School of Materials Science and Engineering, Southwest University, Chongqing 400715, China





Abstract

The current work presents the room-temperature mechanical properties and the corrosion resistance in 3.5% NaCl solution of conventional casting and rapidly solidified Mgsingle bond6Znsingle bondMn (ZM61) magnesium alloys. It is found that the mechanical properties of rapidly solidified ZM61 alloy are dramatically enhanced, with the ultimate strength increased from 335 MPa to 460 MPa (37% increment), which can be attributed to the formation of the refined dendrite microstructure and the strengthening MgZn2 phase distributed within the matrix. Furthermore, the rapidly solidified ZM61 alloy performs better in corrosion resistance than the extruded ZK60 and pure Mg alloys, suggesting that the rapid-solidification technique is a promising way to improve the strength and corrosion resistance of magnesium alloy for the structural and corrosive media utilization.


Highlights

mechanical and corrosion properties of Mg-6Zn-Mn alloy were investigated.

rapid solidification ZM61 alloy possesses an ultimate strength of about 460 MPa.

corrosion penetration rate of the rapid solidification ZM61 alloy was only 11.2 μm/year.



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