| Mg-1．5Mn-1．5Y-3Sn合金显微组织及力学性能研究 |
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| 引用本文： | 房大庆,邓庆东,王宇,张雅琴,张晓茹,张云飞,柴跃生.Mg-1．5Mn-1．5Y-3Sn合金显微组织及力学性能研究[J].新技术新工艺,2013(6):108-112. |
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| 作者姓名： | 房大庆 邓庆东 王宇 张雅琴 张晓茹 张云飞 柴跃生 |
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| 作者单位： | [1]太原科技大学材料科学与工程学院,山西太原150037 [2]吉林大学机械科学与工程学院,吉林长春130022 |
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| 基金项目： | 山西省自然科学基金资助项目（2012011022-05）;山西省UIT资助项目（2012241）;太原科技大学UIT资助项目（XJ2012017） |
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| 摘 要： | 采用挤压结合固溶时效方法，对铸态Mg-1．5Mn-1．5Y-3Sn合金进行了处理。利用扫描电镜、X射线衍射仪及显微硬度计等，研究该本合金在不同的热处理工艺下的显微组织及力学性能。试验结果表明，在铸态下，本合金的显微组织由α-Mg基体、大量颗粒状的第二相Mg2Sn、少量的针状YMg—Sn相组成。经过挤压和固溶后，微观组织中出现纤维状条纹，获得最佳力学性能的时效时间是66h（〈180℃）。拉伸试验表明，最大延伸率8为7％，抗拉强度约为230MPa。断口分析发现，合金的断裂方式主要为准解理断裂。
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| 关 键 词： | 镁合金 显微组织 力学性能 热处理 |
Research on Microstructure and Mechanical Properties of Mg--1.5Mn--1.5Y--3Sn Alloy |
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| FANG Daqing,DENG Qingdong,WANG Yu,ZHANG Yaqin,ZHANG Xiaoru,ZHANG Yunfei,CHAI Yuesheng.Research on Microstructure and Mechanical Properties of Mg--1.5Mn--1.5Y--3Sn Alloy[J].New Technology & New Process,2013(6):108-112. |
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| Authors: | FANG Daqing DENG Qingdong WANG Yu ZHANG Yaqin ZHANG Xiaoru ZHANG Yunfei CHAI Yuesheng |
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| Affiliation: | 1 (1. School of Material Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 150037,China; 2. School of Mechanical Science and Engineering, Jilin University, Changchun 130022,China) |
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| Abstract: | As-cast Mg--1.5Mn--1.5Y--3Sn was handled by using squeezing with solution and aging. The microstructure and mechanical properties of the Mg--1.5Mn--1.5Y--3Sn alloy under different heat treatment processes were studied by the scanning electron microscope, XRD, microhardness tester. The results showed that microstructure of Mg-1.5Mn-1. 5Y-3Sn in as-cast was made of the α-Mg matrix, massive granular second phase Mg2Sn and a few of speculate YMgSn phase. After squeezing and solution and aging, fibrous fringes in microstructure showed up, the holding time that obtained the optimum microstructure and mechanical properties in 180℃ aging treatment is 66 h. The stretching tests showed that biggest extensibility was 7 %, intensity of tension is about 230 MPa. Fracture analysis showed that the main fracture way of alloy is quasi-cleavage crack. |
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| Keywords: | Mg alloy microstructure mechanical properties heat treatment |
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