| 挤压态Mg-10Gd-3Y-0.5Zr镁合金的低温力学性能(英文) |
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| 引用本文： | 张学锋,吴国华,刘文才,丁文江. 挤压态Mg-10Gd-3Y-0.5Zr镁合金的低温力学性能(英文)[J]. 中国有色金属学会会刊, 2012, 22(12): 2883-2890. DOI: 10.1016/S1003-6326(11)61546-X |
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| 作者姓名： | 张学锋 吴国华 刘文才 丁文江 |
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| 作者单位： | 上海交通大学轻合金精密成型国家工程研究中心;上海交通大学金属基复合材料国家重点实验室 |
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| 基金项目： | Project (51275295) supported by the National Natural Science Foundation of China;Project (USCAST2012-15) supported by the Funded Projects of SAST-SJTU Aerospace Advanced Technology Joint Research Centre, China;Project (20120073120011) supported by the Research Fund for the Doctoral Program of Higher Education of China |
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| 摘 要： | 研究多循环低温交变(液氮浸泡处理)和拉伸温度对挤压态Mg10Gd3Y0.5Zr镁合金的微观组织、力学性能以及断裂机制的影响。结果表明,Mg10Gd3Y0.5Zr合金经10d液氮浸泡或10个周期高低温交变循环后,合金室温力学性能基本不变;而经过20个周期高低温循环后,合金的室温抗拉强度由398MPa升高到417MPa。在196°C下拉伸时,挤压态Mg10Gd3Y0.5Zr镁合金的屈服强度和抗拉强度均大幅度提高,分别为349MPa和506MPa,分别增长了18%和27%。合金室温断裂机制为穿晶解理断裂,而低温条件下为韧性断裂和解理断裂并存的混合断裂机制。
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| 关 键 词： | 镁合金 Mg-10Gd-3Y-0.5Zr合金 热处理 力学性能 超低温 |
| 收稿时间： | 2011-10-08 |
Low temperature mechanical properties of as-extruded Mg-10Gd-3Y-0.5Zr magnesium alloy |
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| ZHANG Xue-feng,WU Guo-hua,LIU Wen-cai,DING Wen-jiang. Low temperature mechanical properties of as-extruded Mg-10Gd-3Y-0.5Zr magnesium alloy[J]. Transactions of Nonferrous Metals Society of China, 2012, 22(12): 2883-2890. DOI: 10.1016/S1003-6326(11)61546-X |
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| Authors: | ZHANG Xue-feng WU Guo-hua LIU Wen-cai DING Wen-jiang |
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| Affiliation: | 1, 2 1. National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, China; 2. State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, China |
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| Abstract: | Influence of multi-cycle cryogenic treatment and tensile temperature on microstructure, mechanical properties and fracture mechanism of as-extruded Mg-10Gd-3Y-0.5Zr magnesium alloy was investigated. The results show that there have no significant changes in tensile properties of the tested alloy after 10 d in liquid nitrogen immersion or 10 cycles of high-low temperature treatment at all test temperatures. The room temperature ultimate tensile strength increases from 398 MPa to 417 MPa after 20 cycles of high-low temperature treatments. Compared with the room temperature, the tested alloys exhibit higher tensile properties at low temperatures. At -196 °C, the yield strength and ultimate tensile strength of the as-extruded-T5 Mg-10Gd-3Y-0.5Zr alloy are 349 MPa and 506 MPa, respectively, increasing by about 18% and 27%, respectively. The transgranular cleavage fracture mechanism is observed at room temperature, while at low temperatures both ductile fracture and cleavage fracture behaviors coexist. |
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| Keywords: | magnesium alloy Mg-10Gd-3Y-0.5Zr alloy heat treatment mechanical property super-low temperature |
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