典型文献
Simultaneously improving mechanical properties and corrosion resistance of as-cast AZ91 Mg alloy by ultrasonic surface rolling
文献摘要：
Mg alloy casting parts commonly suffer from drawbacks of low surface properties, high susceptibility to corrosion, unsatisfactory absolute strength, and poor ductility, which seriously limit their wide application. Here, a surface nanocrystallization technique, i.e., ultrasonic surface rolling (USR), was applied on an as-cast AZ91 Mg alloy sheet to improve its corrosion resistance and mechanical properties. The USR produces double smooth surfaces with Ra 0.036 μm and gradient nanostructured surface layers on the sheet. Due to this special microstructure modification, the USR sheet exhibits 55％ and 50％ improvements in yield strength and ultimate tensile strength without visibly sacrificed ductility comparable to its untreated counterpart, as well as a 24％ improvement in surface hardness. The USR sheet also shows good corrosion resistance in 3.5wt％ NaCl aqueous solution. The corrosion current density of the USR sheet reduces by 63％ after immersion for 1 h, and 25％after immersion for 24 h compared to that of the untreated counterpart. The enhanced strength and hardness are mainly related to the gradient nanostructure. The improved corrosion resistance is mainly ascribed to the decreased surface roughness, nanostructured surface, and residual compressive stress. The present results state that USR is an effective and attractive method to improve the multiple properties of Mg alloy cast-ing parts, and thus can be used as an additional and last working procedure to achieve high-performance Mg alloy casting parts.
文献关键词：
中图分类号：
作者姓名：
Jing Han;Cong Wang;Yuanming Song;Zhiyuan Liu;Jiapeng Sun;Jiyun Zhao
作者机构：
School of Mechanical and Electrical Engineering,China University of Mining and Technology,Xuzhou 221116,China;Jiangsu Engineering Technology Research Center on Intelligent Equipment for Fully Mining and Excavating,Xuzhou 221116,China;College of Mechanics and Materials,Hohai University,Nanjing 211100,China
文献出处：
引用格式：
[1]Jing Han;Cong Wang;Yuanming Song;Zhiyuan Liu;Jiapeng Sun;Jiyun Zhao-.Simultaneously improving mechanical properties and corrosion resistance of as-cast AZ91 Mg alloy by ultrasonic surface rolling)[J].矿物冶金与材料学报,2022(08):1551-1558
A类：
nanocrystallization
B类：
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AB值：
0.495341
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机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
