| Al-Ti-B-RE细化剂对Al-7．0Si-0．55Mg合金显微组织和力学性能的影响 |
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| 引用本文： | 王雪姣,徐聪,Arfan MUHAMMAD,Shuji HANADA,Hiroshi YAMAGATA,王文红,马朝利. Al-Ti-B-RE细化剂对Al-7．0Si-0．55Mg合金显微组织和力学性能的影响[J]. 中国有色金属学会会刊, 2014, 24(7): 2244-2250. DOI: 10.1016/S1003-6326(14)63340-9 |
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| 作者姓名： | 王雪姣 徐聪 Arfan MUHAMMAD Shuji HANADA Hiroshi YAMAGATA 王文红 马朝利 |
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| 作者单位： | 北京航空航天大学材料科学与工程学院;空天先进材料与服役教育部重点实验室;Institute |
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| 基金项目： | Project(2012CB619503)supported by the Natioanl Basic Research Program of China;Project(2013AA031001)supported by the National High-tech Research and Development Program of China;Project(2012DFA50630)supported by the International Science&Technology Cooperation Program of China |
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| 摘 要： | 研究添加Al-5Ti-lB-RE细化剂对Al-7．0Si-0．55Mg（A357）合金的显微组织和力学性能的影响。先利用真空熔炼技术制各Al-7．0Si-0．55Mg合金，然后在Al-7．0Si-0．55Mg合金中加入不同成分的Al-5Ti-1B-RE中间合金。通过X射线衍射仪（XRD）、金相显微镜（OM）和扫描电子显微镜（SEM）对显微组织和拉伸试样的断口形貌进行观察。在室温下对合金的力学性能进行测试。观察Al-5Ti-1B-RE细化剂的形态以及内部结构，可以发现以TiB，为异质形核核心的TiAl3／Ti2Al20RE的壳层结构相。在Al-7．0Si-0．55Mg合金中加入Al-5Ti-1B-3．0RE细化剂后，抗拉强度会有明显提升，直到0．2％添加量时，抗拉强度会达到峰值。
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| 关 键 词： | A357 Al-5Ti-1B细化剂 稀土 断口 细化作用 抗拉强度 |
| 收稿时间： | 2013-10-17 |
Effects of Al-Ti-B-RE grain refiner on microstrucmre and mechanical properties of Al-7.0Si-0.55Mg alloy |
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| Xue-jiao WANG,Cong XU,Arfan MUHAMMAD,Shuji HANADA,Hiroshi YAMAGATA,Wen-hong WANG,Chao-li MA. Effects of Al-Ti-B-RE grain refiner on microstrucmre and mechanical properties of Al-7.0Si-0.55Mg alloy[J]. Transactions of Nonferrous Metals Society of China, 2014, 24(7): 2244-2250. DOI: 10.1016/S1003-6326(14)63340-9 |
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| Authors: | Xue-jiao WANG Cong XU Arfan MUHAMMAD Shuji HANADA Hiroshi YAMAGATA Wen-hong WANG Chao-li MA |
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| Affiliation: | Xue-jiao WANG, Cong XU, Arfan MUHAMMAD, Shuji HANADA, Hiroshi YAMAGATA, Wen-hong WANG, Chao-li MA( 1. Key Laboratory of Aerospace Advanced Materials and Performance of Ministry of Education, School of Materials Science and Engineering, Beihang University, Beijing 100191, China; 2. Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan; 3. Center for Advanced Die Engineering and Technology, Gifu University, 1-1 Yanagido, Gifu City, Gifu 501-1193, Japan; 4. Hebei Sitong New Metal Material Co., Ltd., Baoding 071105, China) |
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| Abstract: | To investigate the effects of Al-Ti-B-RE grain refiner on microstructure and mechanical properties of Al-7.0Si-0.55Mg （A357） alloy, some novel Al-7.0Si-0.55Mg alloys added with different amount of Al-STi-1B-RE grain refiner with different RE composition were prepared by vacuum-melting. The microstructure and fracture behavior of the AI-7.0Si-0.55Mg alloys with the grain refiners were observed by X-ray diffraction （XRD）, optical microscopy （OM）, scanning electron microscopy （SEM）, and the mechanical properties of the alloys were tested in mechanical testing machine at room temperature. The observation of AI-Ti-B-RE morphology and internal structure of the particles reveals that it exhibits a TiAl3/Ti2Al20RE core-shell structure via heterogeneous TiB2 nuclei. The tensile strength of Al-7.0Si-0.55Mg alloys with Al-5Ti-1B-3.0RE grain refiner reaches the peak value at the same addition （0.2%） of grain refiner. |
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| Keywords: | A357 alloy Al-5Ti-1B grain refiner rare earth fracture refining effect tensile strength |
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