道次压下率对稀土镁合金板材性能及组织的影响  

Effect of pass reduction on the properties and microstructure of rare earth magnesium alloy sheet

作　　者：周彦材 常原颖 邓嘉飞 田静 梁伟[1,2] ZHOU Yancai;CHANG Yuanying;DENG Jiafei;TIAN Jing;LIANG Wei(College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Key Laboratory of Advanced Magnesium-based Materials,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024 [2]太原理工大学先进镁基材料山西省重点实验室,山西太原030024

出　　处：《轻合金加工技术》2023年第5期29-34,44,共7页Light Alloy Fabrication Technology

基　　金：国家自然科学基金资助项目(U1810208)。

摘　　要：为了制备高强度的稀土镁合金薄板,研究了在交叉轧制过程中道次压下率对稀土镁合金组织演变及力学性能的影响。结果表明:合适的轧制道次压下率不仅有助于改善稀土镁合金的成形性能,同时也可以提高板材的力学性能。轧制后,板材中的晶粒尺寸变细,LPSO相增多,KAM值增大,同时产生细晶强化、固溶强化以及位错强化效果,使稀土镁合金板强度提升;当道次压下率为20%时,板材的基面织构弱化效果显著,可以激活更多种类的滑移系统,使轧制后的板材伸长率增加。In order to prepare high-strength rare earth magnesium alloy sheets,the effect of pass reduction on the microstructure evolution and mechanical properties of rare earth magnesium alloy during the cross-rolling process was studied.The results show that the appropriate rolling pass reduction helps to improve not only the forming properties of rare earth magnesium alloys,but also the mechanical properties of the sheet.After rolling,the grain size in the sheet becomes thinner,the LPSO phase increases,the KAM value increases,and the following effects appear such as fine grain strengthening,solid solution strengthening and dislocation strengthening,which increases the strength of rare earth magnesium alloy sheet.When the pass reductrion is 20%,the texture weakening effect of the base surface of the sheet is significant,and more kinds of slip systems can be activated,so that the elongation of the rolled sheet is increased.

关 键 词：稀土镁合金 交叉轧制 压下量 

分 类 号：TG376.2[金属学及工艺—金属压力加工]