VW53镁合金室温压缩过程中的孪生行为研究  

Twinning Behavior of VW53 Magnesium Alloy During Compression at RT

作　　者：贺彦达 吴迪[1,3] 张承宇 潘文宇 王俭秋[1,4] 周亦胄 孙晓峰[1,3] 李金国[1,3] He Yanda;Wu Di;Zhang Chengyu;Pan Wenyu;Wang Jianqiu;Zhou Yizhou;Sun Xiaofeng;Li Jinguo(Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Nano Science and Technology,University of Science and Technology of China,Suzhou 215127,China;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China;CAS Key Laboratory of Nuclear Materials and Safety Assessment,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China)

机构地区：[1]中国科学院金属研究所师昌绪先进材料创新中心,辽宁沈阳110016 [2]中国科学技术大学纳米学院,江苏苏州215127 [3]中国科学技术大学材料科学与工程学院,辽宁沈阳110016 [4]中国科学院金属研究所核材料和安全评估重点实验室,辽宁沈阳110016 [5]沈阳化工大学材料科学与工程学院,辽宁沈阳110142

出　　处：《稀有金属材料与工程》2024年第9期2604-2613,共10页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(52171055,52371037)。

摘　　要：研究了Mg-5.65Gd-3.15Y-0.48Zr(VW53)镁合金室温压缩过程中的孪生行为及其对组织性能的影响,通过将固溶态VW53镁合金在室温下进行不同应变的压缩试验,然后利用OM、SEM和EBSD等技术对试样进行微观组织观察和分析,并测试试样的维氏显微硬度。结果表明:VW53镁合金在室温压缩过程中,主要产生{1012}拉伸孪晶和{1121}拉伸孪晶,随着应变增加{1012}孪晶会形核、生长、合并、甚至吞并整个晶粒,而{1121}孪晶不会发生显著的扩展合并。孪晶界可以阻碍位错移动和分割细化晶粒,随着应变的增加,孪晶界相互交截和分割细化晶粒的程度提高,可以有效提高VW53镁合金力学性能。The twinning behavior of Mg-5.65Gd-3.15Y-0.48Zr(VW53)magnesium alloy in solid solution was studied by compression experiments with different strains at room temperature,and the effects of twinning on microstructure and properties of the alloy were investigated.The microstructure of VW53 magnesium alloy was observed and analyzed by OM,SEM and EBSD.Vickers microhardness of samples was tested.The results show that{1012}tensile twins and{1121}tensile twins are mainly produced during the compression process of VW53 magnesium alloy at room temperature.With the increase in strain,{1012}twins will nucleate,grow,merge,and even annex the entire grain,while{1121}twins will not expand and merge significantly.With the increase in strain,the degree of cross-cutting of twin boundary and segmentation of refined grain increases,which can effectively improve the mechanical properties of VW53 magnesium alloy.

关 键 词：VW53镁合金 孪生行为 室温压缩 力学性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程]