| Sm对挤压Mg-6Al-1.0Ca-0.5Mn镁合金微观组织及力学性能的影响 |
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| 引用本文： | 房大庆,梁超,张克维,武华杰,毕广利,柴跃生.Sm对挤压Mg-6Al-1.0Ca-0.5Mn镁合金微观组织及力学性能的影响[J].稀有金属材料与工程,2017,46(4):1110-1114. |
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| 作者姓名： | 房大庆 梁超 张克维 武华杰 毕广利 柴跃生 |
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| 作者单位： | 太原科技大学 材料科学与工程学院,太原科技大学 材料科学与工程学院,太原科技大学 材料科学与工程学院,太原科技大学 材料科学与工程学院,兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室,太原科技大学 材料科学与工程学院 |
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| 基金项目： | 太原科技大学博士科研启动项目(20122011),国家自然科学(51301082) 资助 |
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| 摘 要： | 制备了Mg-6Al-1.0Ca-0.5Mn-x Sm(x=0.5,1.5,4.5,质量分数,%)合金,研究了合金的显微组织和力学性能。实验结果表明,随着Sm质量分数的增加,Al_2Sm相主要在晶内析出且体积分数增加,相反Mg_(17)Al_(12)相的体积分数降低;挤压后合金发生动态再结晶,晶粒细化。在室温条件下,含1.5%Sm合金显示了最佳的力学性能,其极限抗拉强度、屈服强度和伸长率分别为316 MPa,148 MPa和21.3%。该合金优异的力学性能主要是由于晶粒细化、Al_2Sm颗粒的弥散强化和减少Mg_(17)Al_(12)相的析出。
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| 关 键 词： | 挤压Mg-Al-Ca-Mn-Sm合金 显微结构 力学性能 |
| 收稿时间： | 2014/12/14 0:00:00 |
| 修稿时间： | 2015/5/6 0:00:00 |
The effect of Sm addition on microstructure and mechanical properties of extruded Mg-6Al-1.0Ca-0.5Mn alloys |
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| Fang Daqing,Liang Chao,Zhang Kewei,WuHuajie,Chai Yuesheng and Bi Guangli.The effect of Sm addition on microstructure and mechanical properties of extruded Mg-6Al-1.0Ca-0.5Mn alloys[J].Rare Metal Materials and Engineering,2017,46(4):1110-1114. |
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| Authors: | Fang Daqing Liang Chao Zhang Kewei WuHuajie Chai Yuesheng and Bi Guangli |
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| Affiliation: | School of Materials Science and Technology,Taiyuan University of Science and Technology,School of Materials Science and Technology,Taiyuan University of Science and Technology,School of Materials Science and Technology,Taiyuan University of Science and Technology,School of Materials Science and Technology,Taiyuan University of Science and Technology,State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou University of Technology,School of Materials Science and Technology,Taiyuan University of Science and Technology |
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| Abstract: | The effect of 0.5, 1.5 and 4.5 (wt.%) Sm addition on microstructure and mechanical properties of extruded Mg-6Al-1.0Ca-0.5Mn alloys was investigated. With increasing the content of Sm, the Al2Sm phase precipitates in the matrix and the amount of the phase increases but that of Mg17Al12 phase decreases. The grains of alloys are refined due to the sufficient occurrence of dynamic recrystallization during extrusion process. The result of tensile tests shows that the alloy containing 1.5wt.% Sm exhibits the best mechanical properties. The improved mechanical properties of the alloy are mainly attributed to grain refinement, the precipitation strengthening of a large number of Al2Sm particles and the decrease of Mg17Al12 phase in the matrix. |
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| Keywords: | extruded Mg-Al-Ca-Mn-Sm alloy microstructure mechanical properties |
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