用金相显微镜、扫描电镜和静态质量损失法对AZ91-xNd镁合金(x=1.1%, 1.4%, 1.9%)的微观组织和腐蚀性能进行表征, 研究了Nd对AZ91镁合金显微组织和耐腐蚀性能的影响。结果表明: 稀土Nd的添加明显细化了合金的组织, 使半连续网状β(Mg17Al12)相变为细小的长条状, 且分布更加均匀。在合金中还生成了颗粒状的Al3Nd;稀土Nd显著提高了镁合金的耐腐蚀性能。添加1.4%Nd的镁合金耐腐蚀性能最佳,平均腐蚀速率为0.1708 mg ? cm-2 d-1, 为AZ91合金的20%。
The microstructure and corrosion behavior of AZ91 magnesium alloys with Nd addition were characterized by optical microscopy , scanning electronic microscopy , and the static mass loss method, the effect of Nd addition on microstructure and corrosion resistance of AZ91 magnesium alloy was investigated. The results show that the trace addition of Nd refines the microstructure of AZ91. The semi-continuous reticular β(Mg17Al12) is gradually becoming the thin strip, and the distribution is more uniform. There are granular Al3Nd phase formed. And rare earth Nd significantly impwroved the resistance corrosion of AZ91 magnesium alloy. The alloy with 1.4% Nd has the best corrosion resistance, and the corrosion rate is 0.1708 mg·cm−2·d−1, only 20% of that of common AZ91 alloy.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] | |
| [8] | XU He, LIU Jingan, XIE Shuisheng, Magnesium Alloy Fabrication and Processing Technology 1, (BengJing, Metallurgical Industry Press, 2007) 1(徐河, 刘静安, 谢水生, 镁合金制备与加工技术, 冶金工业出版社1 (北京, 冶金工业, 2007) 1)2 WANG Jingfeng, QIN Bin, WU Xia, PAN Fusheng, TANG Aitao, Current Status and Development of Research on Anti-corrosion Technology forMagnesium Alloys, Surface Technology, 37(5), 71(2008)(王敬丰, 覃彬, 吴夏, 汤爱涛, 镁合金防腐蚀技术的研究现状及未来发展方向, 表面技术, |
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