| 挤压Mg-8.5Gd-2.3Y-1.8Ag-0.4Zr合金的显微组织与力学性能(英文) |
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| 引用本文： | 周浩,王渠东,陈杰,叶兵,郭炜.挤压Mg-8.5Gd-2.3Y-1.8Ag-0.4Zr合金的显微组织与力学性能(英文)[J].中国有色金属学会会刊,2012,22(8):1891-1895. |
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| 作者姓名： | 周浩 王渠东 陈杰 叶兵 郭炜 |
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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： | Projects (50674067, 51074106) supported by the National Natural Science Foundation of China;Project (2009AA033501) supported by the High-Tech Research and Development Program of China;Project (09JC1408200) supported by the Science and Technology Commission of Shanghai Municipality, China |
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| 摘 要： | 研究铸态和挤压态Mg-8.5Gd-2.3Y-1.8Ag-0.4Zr合金的显微组织、时效强化和力学性能。铸锭在T4处理后分别于400、450和500°C进行挤压,挤压比为10:1。在细晶强化和析出强化的共同作用下,于400°C挤压的样品经T5处理后可以得到最优的力学性能,所得的晶粒尺寸约为5.0μm,其初始和峰值硬度分别为HV109和HV129。室温下的拉伸屈服强度、抗拉强度和伸长率分别达到391MPa、430MPa和5.2%。
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| 关 键 词： | Mg-Gd-Y-Ag-Zr镁合金 挤压 时效强化 微观组织 力学性能 |
| 收稿时间： | 10 November 2011 |
Microstructure and mechanical properties of extruded Mg-8.5Gd-2.3Y-1.8Ag-0.4Zr alloy |
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| ZHOU Hao,WANG Qu-dong,CHEN Jie,YE Bing,GUO Wei.Microstructure and mechanical properties of extruded Mg-8.5Gd-2.3Y-1.8Ag-0.4Zr alloy[J].Transactions of Nonferrous Metals Society of China,2012,22(8):1891-1895. |
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| Authors: | ZHOU Hao WANG Qu-dong CHEN Jie YE Bing GUO Wei |
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| Affiliation: | 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: | The microstructure, age hardening behavior and mechanical properties of an Mg-8.5Gd-2.3Y-1.8Ag-0.4Zr alloy prepared by casting and hot extrusion techniques were investigated. The solution-treated (T4 temper) alloys were extruded at 400, 450 and 500 °C with an extrusion ratio of 10:1, respectively. Optimized mechanical properties were obtained by extrusion at 400 °C followed by T5 treatment under the combined effects of grain refinement and precipitation strengthening. The alloy exhibits a grain size of about 5.0 μm, initial and peak microhardness of HV 109 and HV 129, respectively. The tensile yield strength, ultimate tensile strength and elongation at room temperature are 391 MPa, 430 MPa and 5.2%, respectively. |
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| Keywords: | Mg-Gd-Y-Ag-Zr alloy extrusion age hardening microstructure mechanical property |
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