高应变速率下铸态ZM6镁合金的力学行为研究  

Research on the Mechanical Behavior of ZM6 Magnesium Alloy at High Strain Rates

作　　者：郑兆博 高景龙[1] 孙庆冀 董旭光[1] 闫友军[2] ZHENG Zhaobo;GAO Jinglong;SUN Qingji;DONG Xuguang;YAN Youjun(School of Materials Science and Engineering,Shenyang Ligong University,Shenyang 110159,China;School of Chemical Engineering and Environment,Weifang University of Science and Technology,Shouguang 262700,China)

机构地区：[1]沈阳理工大学材料科学与工程学院,辽宁沈阳110159 [2]潍坊科技学院化工与环境学院,山东寿光262700

出　　处：《铸造技术》2024年第2期187-190,共4页Foundry Technology

摘　　要：利用分离式霍普金森压杆对铸态ZM6镁合金进行高应变速率的动态力学压缩实验,并对ZM6镁合金的力学性能和微观组织进行了研究分析。结果表明,在试样解体之前,随着冲击载荷的提高,试样的应变速率及最大应变不断提高。从真应力-真应变曲线中发现,铸态ZM6镁合金表现出明显的正应变率强化现象,并且随着应变速率的提升,加工硬化效果显著,最高抗冲击强度达到328.1 MPa。通过微观组织分析,铸态ZM6镁合金在高应变速率下的断裂方式为脆性断裂。A high strain rate dynamic mechanical compression test was carried out on an as-cast ZM6 magnesium alloy by using a split Hopkinson pole,and the mechanical properties and microstructure of the resulting ZM6 magnesium alloy were studied and analysed.The results show that the strain rate and the maximum strain of the specimen increase with increasing impact load before disintegration.According to the true stress-strain curve,the as-cast ZM6 magnesium alloy exhibits obvious positive strain rate strengthening.With increasing strain rate,the work hardening effect is significant,and the maximum impact strength reaches 328.1 MPa.According to the microstructural analysis,the fracture mode of the as-cast ZM6 magnesium alloy at a high strain rate is brittle fracture.

关 键 词：ZM6镁合金 高应变速率 霍普金森杆 力学性能 断裂方式 

分 类 号：TG146.2[一般工业技术—材料科学与工程]