Effect of crystal orientation on corrosion behavior of directionally solidified Mg-4 wt% Zn alloy
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2018年第7期
论文作者：Hongmin Jia Xiaohui Feng Yuansheng Yang
文章页码：1229 - 1235
摘 要：Microstructure and crystallographic orientation of directionally solidified Mg-4 wt% Zn alloy were characterized by X-ray computed tomography（XCT） and electron backscatter diffraction（EBSD） in this study.Results reveal that Mg-4 wt% Zn alloy with dendritic microstructure exhibits typical {0002 } basal texture along growth direction. Based on this, the effect of grain orientation on corrosion behavior of directionally solidified Mg-4 wt% Zn alloy in 0.9 wt% NaCl solution was investigated. Result shows that {0002}oriented planes have better corrosion resistance than {1120} and {1010} ones, which is attributed to a synergistic effect of surface energy, atomic packing density and the stability of oxidation film.
Hongmin Jia1,2，Xiaohui Feng1，Yuansheng Yang1,3
1. Institute of Metal Research, Chinese Academy of Sciences2. University of Chinese Academy of Sciences3. Shandong Key Laboratory for High Strength Lightweight Metallic Materials
摘 要：Microstructure and crystallographic orientation of directionally solidified Mg-4 wt% Zn alloy were characterized by X-ray computed tomography（XCT） and electron backscatter diffraction（EBSD） in this study.Results reveal that Mg-4 wt% Zn alloy with dendritic microstructure exhibits typical {0002 } basal texture along growth direction. Based on this, the effect of grain orientation on corrosion behavior of directionally solidified Mg-4 wt% Zn alloy in 0.9 wt% NaCl solution was investigated. Result shows that {0002}oriented planes have better corrosion resistance than {1120} and {1010} ones, which is attributed to a synergistic effect of surface energy, atomic packing density and the stability of oxidation film.
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