Effect of pre-rolling path on mechanical properties of rolled ZK60 alloys  

预轧制路径对ZK60镁合金力学性能的影响

作　　者：Bo SONG Zhi-wen DU Qing-shan YANG Ning GUO Sheng-feng GUO Jin-cheng YU Ren-long XIN 宋波;杜治文;杨青山;郭宁;郭胜锋;于金程;辛仁龙(西南大学材料与能源学院,重庆400715;重庆科技学院冶金与材料工程学院,重庆401331;无锡职业技术学院机械技术学院,无锡214121;重庆大学材料科学与工程学院,重庆400044)

机构地区：[1]School of Materials and Energy,Southwest University,Chongqing 400715,China [2]School of Metallurgy and Materials Engineering,Chongqing University of Science and Technology,Chongqing 401331,China [3]School of Mechanical Technology,Wuxi Institute of Technology,Wuxi 214121,China [4]College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China

出　　处：《Transactions of Nonferrous Metals Society of China》2021年第5期1322-1338,共17页中国有色金属学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No. 51601154);the Fundamental Research Funds for the Central Universities, China (No. XDJK2019B003);the Natural Science Foundation of Jiangsu Higher Education Institutions of China (No. 17KJD430006);Chongqing Municipal Education Commission, China (No. KJZDK202001502)

摘　　要：Pre-cold rolling with low reductions(<3%)was used to improve the mechanical properties of rolled ZK60 plates.The effects of rolling path on mechanical properties were investigated in detail.Both pre-cold rolling along the transverse direction(TD)and pre-cold rolling along the normal direction(ND)can increase the yield strength.However,pre-cold rolling along the TD is more effective than pre-cold rolling along the ND in improving the comprehensive mechanical properties.After pre-cold rolling to 3%reduction,the sample rolled along the TD and the sample rolled along the ND have similar tensile yield strength(~270 MPa).However,the former has a higher compressive yield strength,lower yield asymmetry and larger toughness than the latter.Moreover,pre-cold rolling can also enhance precipitation hardening effect.However,aging treatment cannot further improve the yield strength of pre-cold rolled samples.Finally,the related mechanism is discussed.采用低轧制压下量的预冷轧(<3%)来改善轧制ZK60板的力学性能。详细研究轧制路径对力学性能的影响。沿横向的预冷轧和沿法向的预冷轧均可提高屈服强度。但是,在改善综合力学性能方面,沿横向预冷轧比沿法向预冷轧更为有效。预冷轧3%的压下量后,沿横向轧制的样品和沿法向轧制的样品具有相近的拉伸屈服强度(〜270 MPa)。但是,前者比后者具有更高的压缩屈服强度、更低的屈服不对称性和更好的韧性。此外,预冷轧还可以增强沉淀硬化效果。但是,时效处理不能进一步提高预冷轧样品的屈服强度。最后,讨论相关的机理。

关 键 词：ZK60 alloy pre-cold rolling DISLOCATION TWIN aging mechanical properties 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG339[金属学及工艺—金属材料]