Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第11卷    第z2期    总第100期    2001年11月

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文章编号: 1004-0609(2001)S2-0060-04
稀土对Zn-Al共晶合金超塑性的影响
石志强1,2,叶以富3,1, 李世春2,王焕荣1, 滕新营1

(1. 山东大学 材料液态结构及其遗传性教育部重点实验室, 济南 250061;
2.石油大学 机械与材料学院, 东营 257061;
3. 华东理工大学 环境与资源工程学院,上海 200237
)

摘 要: 采用恒速度法测量了稀土Zn-5Al共晶合金的塑性拉伸曲线,结合金相组织研究了稀土对其超塑性特性的影响。结果表明:在Zn-5Al合金中添加0.05%~0.2%(质量分数,下同)的稀土Ce, 可提高合金超塑变形的延伸率,在350℃以上进行超塑拉伸时,稀土抑制Zn向Al中的扩散和溶解,阻碍扩散-溶解层达到饱和,有利于α/β相界的滑移,从而增强了Zn-5Al合金的超塑性效应。

 

关键字: 锌铝合金; 超塑性; 稀土

Effect of rare earth on superplasticity of
Zn-Al eutectic alloy
SHI Zhi-qiang1,2, YE Yi-fu3,1, LI Shi-chun2, WANG Huan-rong1, TENG Xin-ying1

1. Key Laboratory of Liquid Structure and Heredity of Materials,
Ministry of Education, Shandong University, Ji′nan 250061, P.R.China;
2. College of Mechanical and Materials Engineering,
University of Petroleum, Dongying 257061, P.R.China;
3. College of Resource and Environment Engineering,
East China University of Science and Technology, Shanghai 200237, P.R.China

Abstract:The superplastic deformation curves of Zn-5Al eutectic alloy containing small amounts of rare earths were measured, and the influence of rare earth on the superplasticity was discussed. The results show that the elongation of Zn-5Al eutectic alloy can be increased if less than 0.2% Ce were added, and the rare earth can refrain the diffusion and dissolution of Zn to Al and postpone the saturation of the diffusion-solution zone above 350℃, and in such a way boost up α/β interface sliding and benefit the superplasticity.

 

Key words: Zn-Al alloy; superplasticity; rare earth

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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