摘要
通过实验设计阐明LPSO相对镁合金腐蚀行为的影响。按照形成18R-LPSO相的最小结构单元,即Zn/Y=3/4(摩尔比),设计4种不同LPSO相体积分数的Mg-Zn-Y合金,对比研究4种合金的显微组织和腐蚀行为。结果表明,合金主要含有α-Mg和18R-LPSO相,18R-LPSO相的体积分数随着Zn和Y含量的增加而增加。4种合金中18R-LPSO相的体积分数依次为16.55%、34.45%、54.24%和70.36%,18R-LPSO相的空间分布也由离散块状变为连续网络状。当LPSO相的体积分数在50%左右时,合金的耐蚀性最好,体积分数大于或小于50%都会导致合金耐蚀性能降低。
This study aims to elucidate the effect of LPSO phases on the corrosion behavior of magnesium alloys through experimental design.The microstructure and corrosion behavior of four Mg-Zn-Y alloys designed according to the minimum structural unit for forming the 18R-LPSO phase,i.e.Zn/Y=3/4(molar ratio),were studied in a comparative manner.The results showed that the alloys mainly containedα-Mg and 18R-LPSO phases,and the volume fraction of the 18R-LPSO phase increased with the increase of Zn and Y contents.The volume fraction of the 18R-LPSO phase in the four alloys was,in sequence,16.55%,34.45%,54.24%and 70.36%,and the spatial distribution of the 18R-LPSO phase also changed from discrete blocks to continuous networks.When the volume fraction was about 50%,the corrosion resistance of the alloy was the best.When the volume fraction was greater than or less than 50%,the corrosion resistance of the alloy decreased.
作者
席国强
牟宇
麻彦龙
赵旭晗
熊菊
马凯
王敬丰
Guo-qiang XI;Yu MOU;Yan-long MA;Xu-han ZHAO;Ju XIONG;Kai MA;Jing-feng WANG(College of Material Science and Engineering,Chongqing University of Technology,Chongqing 400054,China;College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China)
基金
supported by Chongqing Talent Plan:Leading Talents in Innovation and Entrepreneurship,China(No.CQYC201903051)
University Innovation Research Group of Chongqing,China(No.CXQT20023)
Qingnian Project of Science and Technology Research Program of Chongqing Municipal Education Commission,China(No.KJQN202001106)
China Postdoctoral Science Foundation(No.2021M700556)
Natural Science Foundation of Chongqing,China(No.cstc2021jcyj-bsh X0114)
Natural Science Foundation of China(Nos.U20A20234,51874062)
Chongqing Foundation and Advanced Research Project,China(No.cstc2019jcyj-zdxm X0010)。
