| Mg-3Al-2Sc合金显微组织与性能研究 |
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| 引用本文： | 沙桂英,王晓磊,刘腾,李朝华,韩玉.Mg-3Al-2Sc合金显微组织与性能研究[J].轻合金加工技术,2012,40(3):51-54. |
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| 作者姓名： | 沙桂英 王晓磊 刘腾 李朝华 韩玉 |
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| 作者单位： | 1. 沈阳航空航天大学材料科学与工程学院,辽宁沈阳,110136
2. 沈阳航空航天大学材料科学与工程学院,辽宁沈阳110136;美国韦恩州立大学机械工程系,密歇根州底特律48202 |
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| 基金项目： | 国家自然科学基金(50801048);航空科学基金(2007ZF54016) |
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| 摘 要： | 采用熔剂保护法制备了Mg-3Al-2Sc合金,并进行热挤压,研究了添加Sc及热挤压后Mg-3Al-2Sc合金的组织与性能.结果表明,稀土Sc能够细化晶粒并形成新的Al3Sc相；热挤压后Mg-3Al-2Sc合金发生了局部动态再结晶,合金屈服强度和抗拉强度较AZ31镁合金的显著提高,拉伸断裂机制主要表现为准解理断裂,并有一定量的沿晶断裂.
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| 关 键 词： | Mg-Al-Sc合金 热挤压 再结晶 显微组织 力学性能 |
Microstructure and property study of Mg-3Al-2Sc alloy |
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| SHA Gui-ying
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WANG Xiao-lei
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LIU Teng
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LI Zhao-hua
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HAN Yu.Microstructure and property study of Mg-3Al-2Sc alloy[J].Light Alloy Fabrication Technology,2012,40(3):51-54. |
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| Authors: | SHA Gui-ying WANG Xiao-lei LIU Teng LI Zhao-hua HAN Yu |
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| Affiliation: | 1 (1.Institute of Materials Science and Engineering,Shenyang Aerospace University,Shenyang 110136,China; 2.Department of Mechanical Engineering,Wayne State University,Detroit 48202,USA) |
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| Abstract: | Mg-3Al-2Sc alloy has been smelted with protecting flux,and the ingot has been hot-extruded.The effect of additive Sc on microstructure and properties of Mg-3Al-2Sc alloy extrusions has been investigated.The results show that the grains have been refined and new Al3Sc phases have been occurred in the Mg-3Al-2Sc alloy while the rare earth Sc being added.Partial dynamic re-crystallization has been formed in the extruded Mg-3Al-2Sc alloy.The yield strength and tensile strength of Mg-3Al-2Sc alloy have been greatly improved compared AZ31 magnesium alloy.The tensile fracture micro-mechanism is mainly quasi-cleavage fracture and inter-granular fracture. |
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| Keywords: | Mg-3Al-2Sc alloy hot-extrusion re-crystallization microstructure mechanical property |
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