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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
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- DOI:
- 作者:
- 郑兆博 1 ，高景龙 1 ，孙庆冀 1 ，董旭光 1 ，闫友军 2
ZHENG Zhaobo1 , GAO Jinglong1 , SUN Qingji1 , DONG Xuguang1 , YAN Youjun2
- 作者单位:
- 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
1. School of Materials Science and Engineering, Shenyang Ligong University, Shenyang 110159, China; 2. School of Chemical Engineering and Environment, Weifang University of Science and Technology, Shouguang 262700, China
- 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
ZM6 magnesium alloy; high strain rate; Hopkinson pole; mechanical property; fracture mode
- 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.