摘要
通过XRD、SEM、EDS、腐蚀失重、电化学等方法研究了1%Er改性AM50镁合金的组织、耐蚀性及剩余强度性能,并拟合出实验条件下AM50和AM50Er1镁合金的腐蚀剩余强度的寿命预测公式。结果表明,Er添加后,合金中出现了新的Al3Er和Al7Er Mn5相,并且β相的数量和体积均减小。Er加入后,其净化作用、腐蚀膜层质量的提高和有效腐蚀微电偶对数量的减少都使合金的耐蚀性得到了改善。Er加入后,由于拉伸性能的改进和耐蚀性的提高,AM50镁合金的剩余强度性能得到了改善。
The microstructure,corrosion properties of 1% wt. Er modified AM50 magnesium alloy were evaluated by Xray diffraction（XRD）,scanning electron microscopy（SEM）,energy dispersive spectroscopy（EDS）,electrochemical and mechanical stretch methods. Further more,the lifetime prediction formula of corrosion residual strength under experimental conditions were fitted. The results indicated that β-Mg17Al12 phase decreased and Al3Er and Al7ErMn5 phase existed after Er addition. The corrosion resistance of the magnesium alloy improved after Er addition,because of the purification of alloy liquid,the quality improvement of corrosion coating and the decreasing of micro-galvanic couples due to the decreasing of βphase. With the 1%wt. Er addition,the tensile strength and corrosion resistant were both improved,which improved the corrosion residual strength（CRS） of AM50 magnesium alloy.
出处
《稀土》
EI
CAS
CSCD
北大核心
2018年第1期142-148,共7页
Chinese Rare Earths
基金
国家自然科学基金项目(51201068)
吉林省科技发展项目(201201032)
长春市科技发展项目(11KZ31)
关键词
镁合金
ER
耐蚀性
剩余强度
magnesium alloy
Er
corrosion resistant
corrosion residual strength
