| Mg-6Gd-3Y-2Zn-0.5Zr镁合金的组织和性能 |
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| 引用本文： | 房灿峰,彭鹏,孟令刚,王老虎,郝海,张兴国.Mg-6Gd-3Y-2Zn-0.5Zr镁合金的组织和性能[J].特种铸造及有色合金,2012,32(8):710-713. |
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| 作者姓名： | 房灿峰 彭鹏 孟令刚 王老虎 郝海 张兴国 |
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| 作者单位： | 大连理工大学材料科学与工程学院 |
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| 基金项目： | 国家高技术研究发展计划(863计划)资助项目，航空科学基金资助项目 |
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| 摘 要： | 设计了新型Mg-6Gd-3Y-2Zn-0.5Zr镁合金,并用光学显微镜、扫描电镜及拉伸试验机对合金铸态、均匀化态及挤压态的显微组织特征和力学性能进行了研究。结果表明,铸态Mg-6Gd-3Y-2Zn-0.5Zr合金组织主要由α-Mg基体和沿晶界分布的块状长周期堆垛有序结构相组成,均匀化处理(450℃×16h)促使细小层片状的长周期堆垛有序结构相由晶界向晶内生长。挤压态Mg-6Gd-3Y-2Zn-0.5Zr合金在200℃下时效处理,无明显时效硬化现象,但挤压态合金具有优良的强韧性能,室温抗拉强度、屈服强度和伸长率分别为335MPa、276MPa和17%。
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| 关 键 词： | 稀土镁合金 显微组织 长周期堆垛有序结构相 热挤压 力学性能 |
Microstructure and Properties of Mg-6Gd-3Y-2Zn-0.5Zr Magnesium Alloy |
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| Fang Canfeng
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Peng Peng
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Meng Linggang
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Wang Laohu
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Hao Hai
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Zhang Xingguo.Microstructure and Properties of Mg-6Gd-3Y-2Zn-0.5Zr Magnesium Alloy[J].Special Casting & Nonferrous Alloys,2012,32(8):710-713. |
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| Authors: | Fang Canfeng Peng Peng Meng Linggang Wang Laohu Hao Hai Zhang Xingguo |
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| Affiliation: | (School of Materials Science and Engineering,Dalian University of Technology) |
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| Abstract: | Microstructures and mechanical properties of as-cast,solution-treated and extruded novel Mg-6Gd-3Y-2Zn-0.5Zr magnesium alloy have been investigated by optical microscope(OM),SEM(scanning electron microscope) and tensile testing.The results show that the as-cast microstructure of Mg-6Gd-3Y-2Zn-0.5Zr alloy consists of α-Mg matrix and the block-like long period stacking ordered structure(LPSO) phase distributed around α-Mg matrix.After solution treatment at 450 ℃ for 16 h,fine lamellar structure LPSO phases grows from grain boundaries to the interior of the grains.The distinct age hardening response in extruded Mg-6Gd-3Y-2Zn-0.5Zr alloy aged at 200 ℃ can not be observed,however,the extruded alloy exhibits high strength and ductility,and ultimate tensile strength(UTS),yield tensile strength(YTS)and elongation reach 335 MPa and 276 MPa,17%,respectively. |
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| Keywords: | Magnesium-Rear Earth Alloy Microstructures Long Period Stacking Ordered Structure Phase Hot Extrusion Mechanical Properties |
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