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- Title
The Enhancement of Mg Corrosion Resistance by Alloying Mn and Laser-Melting.
- Authors
Youwen Yang; Ping Wu; Qiyuan Wang; Hong Wu; Yong Liu; Youwen Deng; Yuanzhuo Zhou; Cijun Shuai
- Abstract
Mg has been considered a promising biomaterial for bone implants. However, the poor corrosion resistance has become its main undesirable property. In this study, both alloying Mn and laser-melting were applied to enhance the Mg corrosion resistance. The corrosion resistance, mechanical properties, and microstructure of rapid laser-melted Mg-xMn (x = 0-3 wt %) alloys were investigated. The alloys were composed of dendrite grains, and the grains size decreased with increasing Mn. Moreover, Mn could dissolve and induce the crystal lattice distortion of the Mg matrix during the solidification process. Mn ranging from 0-2 wt % dissolved completely due to rapid laser solidification. As Mn contents further increased up to 3 wt %, a small amount of Mn was left undissolved. The compressive strength of Mg-Mn alloys increased first (up to 2 wt %) and then decreased with increasing Mn, while the hardness increased continuously. The refinement of grains and the increase in corrosion potential both made contributions to the enhancement of Mg corrosion resistance.
- Subjects
CORROSION resistant materials; MAGNESIUM; CORROSION resistance; MECHANICAL behavior of materials; SOLIDIFICATION
- Publication
Materials (1996-1944), 2016, Vol 9, Issue 4, p216
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma9040216