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材料工程  2014, Vol. 0 Issue (12): 1-10    DOI: 10.11868/j.issn.1001-4381.2014.12.001
  材料与工艺 本期目录 | 过刊浏览 | 高级检索 |
稀土元素Y和Ce对热轧Mg-1.5Zn镁合金组织和室温成形性能的影响
刘鹏, 江海涛, 段晓鸽, 康强
北京科技大学 高效轧制国家工程研究中心, 北京 100083
Effects of Yttrium(Y) and Cerium(Ce) on Microstructure and Stretch Formability of Hot Rolled Mg-1.5Zn Magnesium Sheet at Room Temperature
LIU Peng, JIANG Hai-tao, DUAN Xiao-ge, KANG Qiang
National Engineering Research Center of Advanced Rolling, University of Science and Technology Beijing, Beijing 100083, China
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摘要 设计了成分为Mg-1.5Zn-xY和Mg-1.5Zn-xCe(x=0,0.2,0.5,1.0)两组试样.通过光学显微镜、扫描电镜、X衍射等研究稀土Y和Ce对热轧态Mg-1.5Zn合金组织和室温成形性能的影响.结果表明:Y和Ce元素可以有效地弱化合金的(0002)基面织构,而且基面织构均沿着TD方向发生一定程度的分裂.Y和Ce元素的加入,使合金中分别形成了Mg2Y5,Mg3Zn3Y和MgZnCe弥散的第二相粒子,起到了细晶强化作用.此外,还有利于合金再结晶行为的发生,使得合金塑性(伸长率最高达27%)、强度(抗拉强度最高达252MPa)和室温成形性能(杯突值最高可达5.46)都得到很大提高.但是,过多Y和Ce的加入将不利于合金性能的进一步提高.
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刘鹏
江海涛
段晓鸽
康强
关键词 镁合金稀土元素基面织构力学性能成形性能    
Abstract:Mg-1.5Zn-xY and Mg-1.5Zn-xCe (x= 0,0.2,0.5,1.0) alloys were designed to investigate the effect of Y and Ce on microstructure and formability of hot rolled Mg-1.5Zn sheet at room temperature via optical microscope(OM), scanning electron microscopy(SEM) and X-ray diffraction(XRD) etc. The results show that Y and Ce elements can effectively weaken and modify the basal texture where the position of basal plane is tilted from normal direction(ND) toward transverse direction(TD). The formation of second phase particles Mg2Y5,Mg3Zn3Y and MgZnCe due to the addition of Y and Ce element plays a fine grain size strengthening role in the alloys. Besides, it is conducive to the recrystallization, leading to the great improvement of ductility (the maximum of elongation is 27%), strength (the maximum of tensile strength is 252MPa) and stretch formability (the maximum of Erichsen value is 5.46) of alloys. However, excessive addition of Y and Ce elements is harmful to further improvement of alloys' performance.
Key wordsmagnesium alloy    rare-earth    basal texture    mechanical property    stretch formability
收稿日期: 2014-07-07      出版日期: 2014-12-20
1:  TG146.2  
通讯作者: 江海涛(1976-),男,博士,副研究员,从事镁合金、铝合金、钛合金品种开发和成型性研究工作,联系地址:北京市海淀区学院路30号北京科技大学科技楼708(100083)     E-mail: nwpujht@163.com
引用本文:   
刘鹏, 江海涛, 段晓鸽, 康强. 稀土元素Y和Ce对热轧Mg-1.5Zn镁合金组织和室温成形性能的影响[J]. 材料工程, 2014, 0(12): 1-10.
LIU Peng, JIANG Hai-tao, DUAN Xiao-ge, KANG Qiang. Effects of Yttrium(Y) and Cerium(Ce) on Microstructure and Stretch Formability of Hot Rolled Mg-1.5Zn Magnesium Sheet at Room Temperature. Journal of Materials Engineering, 2014, 0(12): 1-10.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2014.12.001      或      http://jme.biam.ac.cn/CN/Y2014/V0/I12/1
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