Mg-2Zn合金室温单向压缩过程中的孪生行为与组织性能演变  

Twinning Behavior and Microstructure and Properties Evolution of Mg-2Zn Alloy During Unidirectional Compression at Room Temperature

作　　者：潘文宇 吴迪[2,3] 张承宇 邹航 贺彦达[2,3] 李金国 Pan Wenyu;Wu Di;Zhang Chengyu;Zou Hang;He Yanda;Li Jinguo(School of Materials Science and Engineering,Shenyang University of Chemical Technology,Liaoning,110142;Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Liaoning,110016;School of Materials Science and Engineering,University of Science and Technology of China,Liaoning,110016)

机构地区：[1]沈阳化工大学材料科学与工程学院,辽宁110142 [2]中国科学院金属研究所师昌绪先进材料创新中心,辽宁110016 [3]中国科学技术大学材料科学与工程学院,辽宁110016

出　　处：《当代化工研究》2025年第2期67-69,共3页Modern Chemical Research

基　　金：国家自然科学基金“基于孪生行为调控镁合金锻件力学性能各向异性及织构弱化机理研究”(项目编号:52171055);国家自然科学基金“可室温成形高强镁合金板材制备与强塑化机制研究”(项目编号:52371037)。

摘　　要：研究Mg-2Zn合金在室温压缩过程中的孪生行为及其对合金组织和性能的影响。对固溶态Mg-2Zn合金在室温下进行不同应变值的单向压缩实验,通过EBSD对不同应变值压缩的固溶态Mg-2Zn合金微观组织进行表征,并测试压缩至不同应变的Mg-2Zn合金的硬度。研究结果表明,Mg-2Zn合金室温单向压缩过程中主要形成的是{10-12}拉伸孪晶。随着压缩应变的增加,拉伸孪晶形核、生长并吞并母体晶粒。在压缩过程中,适当的应变量会促使{10-12}拉伸孪晶不断的形核与生长,孪晶界面的增多可以细化晶粒;此外,孪晶界与位错间的相互作用显著提高Mg-2Zn合金的应变硬化速率,导致硬度显著提高。The influence of twinning behavior on the microstructure and properties of Mg-2Zn alloy during deformation was investigated.Unidirectional compression experiments were conducted on Mg-2Zn alloy with different strain values.The microstructure evolution of Mg-2Zn alloy compressed with different strain values was characterized by EBSD,and the hardness values were also tested.With the increase of compressive strain,tensile twinning nucleates,grows,and engulfs the parent grain.During the compression process,{10-12}tensile twins continuously nucleate and grow,and the increase in twin boundary leads to grain refinement.The interaction between twin boundaries and dislocations significantly increases the strain hardening rate of Mg-2Zn alloy,resulting in a significant increase in hardness.

关 键 词：镁合金 孪生 室温压缩 组织演变 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]