叶杰,林小娉,董允,滕飞,孙桂芳,韩杰.复合添加Cr、Bi元素的ZA84镁合金时效硬化及微观组织研究[J].稀有金属材料与工程,2018,47(1):39~42.[Jie Ye,Xiao-ping Lin,Yun Dong,Fei Teng,Gui-fang Sun,jie Han.Age hardening and microstructure of ZA84 magnesium alloy with the combined addition of Cr and Bi[J].Rare Metal Materials and Engineering,2018,47(1):39~42.]
复合添加Cr、Bi元素的ZA84镁合金时效硬化及微观组织研究
投稿时间:2016-07-22  修订日期:2017-03-17
中文关键词:  ZA84-0.2Cr-0.5Bi镁合金  晶体缺陷  时效硬化  强化相
基金项目:国家自然科学基金项目(51675092)、河北省自然科学基金项目(E2014501123)
中文摘要:
      本文利用扫描电镜及高分辨透射电镜对复合添加Cr、Bi元素的ZA84镁合金的时效硬化及微观组织进行了研究。其结果表明:在ZA84合金中复合添加微量的Cr、Bi元素能显著增强合金时效硬化效果。ZA84-0.2Cr-0.5Bi合金经160℃时效,在时效初期基体存在严重的晶格畸变并含有数量较多的晶体缺陷。峰时效阶段合金微观组织中析出大量呈棒状或块状的MgZn2相以及粒状的Bi2Mg3相,此时合计峰时效硬度达到92.48HV。随着时效时间的延长,沉淀相继续长大并粗化,其硬度也略有下降。
Age hardening and microstructure of ZA84 magnesium alloy with the combined addition of Cr and Bi
英文关键词:ZA84-0.2Cr-0.5Bi alloy  Crystal defect  Age hardening  Strengthening phase
英文摘要:
      The age hardening and microstructure of ZA84 magnesium alloy with the combined addition of Cr and Bi was studied by SEM and HRTEM. The results show a trace amount of Cr and Bi has a significant enhancement effect on the hardness of aging. When the ZA84-0.2Cr-0.5Bi alloy aged at 160℃, during the early aging period, the matrix has serious lattice distortion and a large number of crystal defects. The microstructure at the peak aging consists of a large number of rod-like or blocky β1’-MgZn2 phases and granular Bi2Mg3 phases, and the peak hardness value is 92.48HV. When ageing proceeded, the precipitate coarsening resulted in the hardness value reduction.
作者单位E-mail
叶杰 东北大学 材料科学与工程学院 yejie9966@163.com 
林小娉 东北大学 材料科学与工程学院 lxping3588@163.com 
董允 东北大学 材料科学与工程学院  
滕飞 东北大学 材料科学与工程学院  
孙桂芳 东北大学 材料科学与工程学院  
韩杰 东北大学 材料科学与工程学院  
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