| Sr含量对A356合金微观组织及力学性能的影响 |
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| 引用本文： | Sr含量对A合金微观组织及力学性能的影响.Sr含量对A356合金微观组织及力学性能的影响[J].山东科学,2016,29(5):65-69. |
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| 作者姓名： | Sr含量对A合金微观组织及力学性能的影响 |
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| 作者单位： | 1.山东建筑大学，山东 济南 250101；2.山东省轻质高强金属材料省级重点实验室（筹）, 山东省科学院新材料研究所，山东 济南 250014 ；3,山东省汽车轻量化镁合金材料工程技术研究中心,山东省科学院新材料研究所，山东 济南 250014；4.山东省科学院新材料研究所，山东 济南 250014 |
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| 基金项目： | 山东省博士基金（BS2015CL016）；山东省科学院青年基金（2014QN026） |
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| 摘 要： | 通过在A356合金中添加Al-10Sr中间合金，分析Sr含量对A356合金微观组织及力学性能的影响规律。结果表明，随着Sr含量的增加，其力学性能先升高后降低。当Sr加入量质量分数达到0.03%时，其抗拉强度为204 MPa、延伸率为10.4%，较未变质的A356合金分别提升了18%、189%。通过微观组织分析表明，Sr的添加能够明显改善A356合金中共晶硅相的形貌，由粗大的针片状转变为细小的纤维状或颗粒状，从而改善合金的力学性能。
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| 关 键 词： | 力学性能 Sr含量 A356合金 微观组织 |
| 收稿时间： | 2016-04-18 |
Impact of Sr content on microstructure andmechanical properties of A356 alloy |
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| ZHAO Hou liang,ZHOU Ji xue,TANG Shou qiu,WANG Jin wei,ZHANG Lin lin,CHEN Yan fei,LI Chang long,WU Jian hua.Impact of Sr content on microstructure andmechanical properties of A356 alloy[J].Shandong Science,2016,29(5):65-69. |
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| Authors: | ZHAO Hou liang ZHOU Ji xue TANG Shou qiu WANG Jin wei ZHANG Lin lin CHEN Yan fei LI Chang long WU Jian hua |
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| Institution: | 1. Shandong Jianzhu University, Jinan 250101,China ;2. Shandong Provincial Key Laboratory of High Strength Lightweight Metallic Materials (in preparation),Advanced Materials Institute,Shandong Academy of Sciences, Jinan 250014, China; 3. Shandong Engineering Research Center of Lightweight Automobiles Magnesium Alloys, Advanced Materials Institute,Shandong Academy of Sciences,Jinan 250014, China; 4. Advanced Materials Institute, Shandong Academy of Sciences, Jinan 250014, China |
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| Abstract: | We analyzed the impact of Sr content on microstructure and mechanical properties of A356 alloy through Al 10Sr master alloy addition. Results show that mechanical properties of A356 alloy first increase and then decrease with the increase of Sr content. It has tensile strength of 204 MPa and elongation rate of 10.4% for Sr content of 0.03%. The two parameters are improved by 18% and 189%, as compared with unmodified A356 alloy. Microstructure analysis indicates that Sr addition can significantly change the morphology of eutectic silicon, from coarse plate form to fine fibrous or particle form, so its mechanical properties are improved. |
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| Keywords: | Sr content mechanical properties A356 alloy microstructure |
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