代言,陈先华,徐笑阳,赵超越,刘春全,赵娣,刘晓芳,罗铸,涂滕,潘复生.轧制和退火态的Mg-Y-Zr-xNd合金的组织和力学性能[J].稀有金属材料与工程,2019,48(7):2099~2106.[Dai Yan,Chen Xianhua,Xu Xiaoyang,Zhao Chaoyue,Liu Chunquan,Zhao Di,Liu Xiaofang,Luo Zhu,Tu Teng,Pan Fusheng.Microstructure and Mechanical Properties of Rolled and Annealed Mg-Y-Zr-xNd Alloys[J].Rare Metal Materials and Engineering,2019,48(7):2099~2106.]
轧制和退火态的Mg-Y-Zr-xNd合金的组织和力学性能
投稿时间:2018-06-21  修订日期:2018-09-12
中文关键词:  Mg-Y-Zr-Nd合金  组织  力学性能  再结晶
基金项目:中国科学院重点资助项目,国家自然科学基金项目(面上项目,重点项目,重大项目),中央高校基础研究资助项目
中文摘要:
      通过光学显微组织(OM),扫描电子显微镜(SEM),X射线衍射(XRD),电子背散射衍射(EBSD)和拉伸试验研究了不同热处理条件下Mg-5Y-0.6Zr-xNd (x = 0, 0.5和1wt.%) 合金的组织和力学性能。结果表明,随着Nd含量的增加,第二相Mg24Y5和Mg14Nd2Y (β)在基体中的含量增加。添加少量Nd可以降低α-Mg的堆垛层错能,促进热轧过程中的动态再结晶。随着Nd含量的增加,静态再结晶的体积分数明显增加。退火处理后Mg-5Y-0.6Zr-0Nd合金的平均晶粒尺寸可细化至3.73μm。轧制合金的抗拉强度随着Nd的增加而增加,而伸长率则表现出相反的变化趋势。含有1.01wt.%Nd的轧制合金具有优良的机械性能,其拉伸强度,屈服强度和伸长率分别为336MPa,278MPa和16.3%。在微观结构观察的基础上,讨论了力学性能的变化。
Microstructure and Mechanical Properties of Rolled and Annealed Mg-Y-Zr-xNd Alloys
英文关键词:Mg-Y-Zr-Nd alloys  microstructure  mechanical properties  recrystallization
英文摘要:
      Microstructures and mechanical properties of Mg-5Y-0.6Zr-xNd (x=0, 0.5 and 1wt.%) alloys under various heat treatment conditions were investigated by optical microstructure (OM), scanning electron microscope (SEM), X-ray diffraction (XRD), electron backscatter diffraction (EBSD) and tensile tests. Results showed that with increasing content of Nd, the amount of second phases Mg24Y5 and Mg14Nd2Y (β) was increased in the matrix. Minor Nd addition can reduce the stacking fault energy of α-Mg and promote the dynamic recrystallization during hot-rolled process. As the Nd content increases, the volume fraction of static recrystallization was promoted obviously. The average grain size of Mg-5Y-0.6Zr-0Nd alloy after annealed treatment can be refined to 3.73 μm. Tensile strength of as-rolled alloys increased with the addition of Nd, while the elongation exhibited an opposite change tendency. As-rolled alloy sheet with 1.01 wt.% Nd exhibited the remarkable mechanical properties, which the values of ultimate tensile strength, yield strength and elongation were 336 MPa, 278 MPa and 16.3%, respectively. Based on the microstructure observation, the changes of mechanical properties have been discussed.
作者单位E-mail
代言 重庆大学材料科学与工程学院 yan.dai@cqu.edu.cn 
陈先华 重庆大学材料科学与工程学院 xhchen@cqu.edu.cn 
徐笑阳 重庆大学材料科学与工程学院  
赵超越 重庆大学材料科学与工程学院  
刘春全 重庆大学材料科学与工程学院  
赵娣 重庆大学材料科学与工程学院  
刘晓芳 重庆大学材料科学与工程学院  
罗铸 重庆大学材料科学与工程学院  
涂滕 重庆大学材料科学与工程学院  
潘复生 重庆大学材料科学与工程学院  
摘要点击次数: 81
全文下载次数: 20
查看全文  查看/发表评论  
关闭