金属学报  2006, Vol. 42 Issue (4): 443-448

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Ce对AZ91镁合金铸态组织细化的影响

刘生发;黄尚宇;徐萍

武汉理工大学

The influence of cerium addition on the microstructure of AZ91 magnesium alloy and grain refinement mechanism

Liu S F

武汉理工大学

刘生发; 黄尚宇; 徐萍 . Ce对AZ91镁合金铸态组织细化的影响[J]. 金属学报, 2006, 42(4): 443-448 .
, , . The influence of cerium addition on the microstructure of AZ91 magnesium alloy and grain refinement mechanism[J]. Acta Metall Sin, 2006, 42(4): 443-448 .

摘要 参考文献 相关文章 Metrics 全文: PDF(856 KB)   摘要: 借助电子探针(EPMA)和X射线衍射仪(XRD)研究了Ce对AZ91镁合金铸态显微组织的影响。结果表明，少量的Ce 对α-Mg基体有明显地细化作用，β-Mg17Al12相变得弥散细小，而且组织中形成了针状或杆状的Al4Ce化合物。随Ce量的增加，β-Mg17Al12相数量逐渐减少，Al4Ce化合物变得粗大。利用能谱分析和液淬技术研究了铸态组织的细化机制。 关键词 ： AZ91镁合金,  铈,  显微组织细化     Abstract：The effect of cerium addition on the microstructures of AZ91 magnesium alloy has been studied. It was found that a small amount of cerium addition to AZ91 magnesium alloy produced a large decrease in the α-Mg grain size. With increasing Ce addition, the amount of β-Mg17Al12 phase was decreased, and its size became dispersed fine. In addition, the rod-shaped or needle-like Al4Ce phases mainly distributed at grain boundaries have been observed in the AZ91 alloys with Ce addition. The grain refinement mechanism was investigated using EDS analysis and water-quenched microstructural observation. The results showed that the grain refinement of the AZ91 alloys containing Ce was mainly attributed to the addition of Ce generated constitutional undercooling at solidification interface front, consequently, increase in the number of nucleation. In addition, its restricting growth effect on the α-Mg crystals can result in the further grain refinement. Key words： AZ91 magnesium alloy    cerium    microstructure refinement 收稿日期: 2005-07-19      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 刘生发 黄尚宇 徐萍 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y2006/V42/I4/443 [1] Polmear I J. Mater Sci Technol, 1994; 1: 1 [2] Mordike B L, Ebert T. Mater Sci Eng, 2001; A302: 37 [3] Edward J, Vinarci K. Light Met Age, 2001; 4: 74 [4] Dwain M. Magers. Light Met Age, 1996; 5: 60 [5] Bamberger M. Mater Sci Technol, 2001; 1: 15 [6] Tamura Y, Kono N, Motigi T, Sato E. Jpn Inst Light Met, 1998; 48: 395 [7] Tamura Y. Jpn Inst Light Met, 1998; 48(8): 185 [8] Nair K S, Mittal M C. Mater Sci Forum, 1988; 30: 89 [9] Wei L Y. Mater Sci Technol, 1996; 12: 741 [10] Pettersen G. Mater Sci Eng, 1996; A207: 115 [11] Wei L Y. J Alloys Compd, 1996; 232: 264 [12] Pettersen K, Lohne O, Ryum N. Metall Mater Trans, 1999; 21A: 221 [13] Song G, Atrens A, St John D, Wu X, Nairn J. Corros Sci, 1997; 39: 1981 [14] Ambat R, Aung N, Zhou W. Corros Sci, 2000; 42: 1433 [15] Song G, Atrens A, Wu X L, Zhang B. Corros Sci, 1998; 40: 1769 [1] 潘晓铭,吴俊升,肖葵,高书君,裴礼鸿,田然,李晓刚. 铝合金表面缓蚀自修复疏水性膜层的制备与表征[J]. 金属学报, 2013, 49(9): 1113-1120. [2] 张金玲,冯芝勇,胡兰青,王社斌,许并社. 不同La含量AZ91合金的时效硬化行为[J]. 金属学报, 2012, 48(5): 607-614. [3] 王社斌 祁小叶 张金玲 刘璐 许并社. 时效处理和La含量对AZ91合金组织和力学性能的影响[J]. 金属学报, 2011, 47(6): 743-750. [4] 钟丽应; 曹发和; 施彦彦; 文强; 张昭; 张鉴清 . AZ91镁合金表面铈基稀土转化膜的制备及腐蚀电化学行为[J]. 金属学报, 2008, 44(8): 979-985 . [5] 张金涛; 杨春勇; 潘亮; 李春东 . 2A12铝合金表面铈盐掺杂硅烷杂化膜在3.5%NaCl溶液中耐蚀性能的电化学研究[J]. 金属学报, 2008, 44(11): 1372-1377 . [6] 袁广银; 刘满平; 王渠东; 朱燕萍; 丁文江 . Mg-Al-Zn-Si合金的显微组织细化[J]. 金属学报, 2002, 38(10): 1105-1108 . [7] 任俊. N-羟基邻苯二甲酰亚胺对氟碳铈矿的浮选性能及其作用机理[J]. 金属学报, 1993, 29(6): 49-53. [8] 刘耀辉;于思荣;何镇明;李庆春. Ce对Al_2O_3/中锰钢界面润湿性的影响及其机理[J]. 金属学报, 1991, 27(1): 126-129. [9] 张东彬;吴承建. Ce在α-Fe晶界的偏聚及其对磷的晶界平衡偏聚的影响[J]. 金属学报, 1988, 24(2): 100-105. Viewed Full text Abstract Cited   Shared      Discussed