| 程鹏,陈云贵,丁武成,王春明.热挤压Mg-3Sn-1Zn-xCu合金的显微组织与力学性能[J].材料导报,2018,32(20):3562-3565 |
| 热挤压Mg-3Sn-1Zn-xCu合金的显微组织与力学性能 |
| Microstructure and Mechanical Properties of Hot-extruded Mg-3Sn-1Zn-xCu Alloys |
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| DOI：10.11896/j.issn.1005-023X.2018.20.012 |
| 中文关键词: 铜 Mg-3Sn-1Zn合金 热挤压 显微组织 力学性能 |
| 英文关键词: Cu, Mg-3Sn-1Zn alloy, hot-extrusion, microstructure, mechanical properties |
| 基金项目:程鹏:男,1991年生,硕士研究生,研究方向为高强镁合金 E-mail:1316907554@qq.com 陈云贵:通信作者,男,1960年生,博士,教授,博士研究生导师,研究方向为轻质金属结构材料 E-mail:ygchen60@aliyun.com |
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| 中文摘要: |
| 研究了添加Cu对热挤压Mg-3Sn-1Zn合金显微组织和力学性能的影响。结果表明:添加少量Cu能显著细化热挤压Mg-3Sn-1Zn合金晶粒,同时在合金中形成具有高热稳定性的CuMgZn相,提高了合金的室温及高温强度和塑性。当Cu含量为0.5%时,热挤压Mg-3Sn-1Zn-0.5Cu合金的晶粒最细,为2.8 μm；其强度和塑性最高,室温屈服强度为241 MPa,伸长率为20.3%,150 ℃时屈服强度为128 MPa,室温拉伸力学性能优于挤压态AZ31B合金,高温强度优于铸态AE42合金。 |
| 英文摘要: |
| Effects of Cu on microstructure and mechanical properties of hot-extruded Mg-3Sn-1Zn alloy were investigated. The results showed that the grain size of the hot-extruded Mg-3Sn-1Zn alloy was remarkably refined with a small amount of Cu, and the thermostable CuMgZn phase was formed in the alloys. Therefore, the strength and plasticity of the hot-extruded Mg-3Sn-1Zn-xCu alloys improved. The grain of the hot-extruded Mg-3Sn-1Zn-0.5Cu alloy was the finest with a size of 2.8 μm. The tensile yield strength and elongation of the hot-extruded Mg-3Sn-1Zn-0.5Cu alloy at room temperature were 241 MPa and 20.3%, respectively, which were superior to that of the hot-extruded AZ31B alloy. In addition, the tensile yield strength of the Mg-3Sn-1Zn-0.5Cu alloy at 150 ℃ was 128 MPa, which was better than that of as-cast AE42 alloy. |
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