| Al4 C3细化AZ91合金晶粒的现象和机理 |
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| 引用本文： | 王春建,金青林,蒋业华,周荣.Al4 C3细化AZ91合金晶粒的现象和机理[J].材料热处理学报,2010,31(11). |
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| 作者姓名： | 王春建 金青林 蒋业华 周荣 |
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| 作者单位： | 昆明理工大学分析测试研究中心;云南省分析测试中心;昆明理工大学材料科学与工程学院; |
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| 摘 要： | 通过向熔体中直接添加Al4C3颗粒,研究了Al4C3对AZ91合金的晶粒细化现象和机理的影响.结果表明,Al4C3颗粒对AZ91合金的晶粒细化效果与孕育参数直接相关,孕育温度越高孕育时间越久,Al4C3的细化效果越明显.研究发现,实验添加的Al4C3颗粒并没有直接成为镁的晶核,而是被推开到了晶粒生长界面前沿,Al4C3的细化作用主要是因为Al4C3发生了微量的溶解,从而向熔体中提供了碳,碳的存在对熔体起到了碳质孕育法处理的作用.
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| 关 键 词： | 镁合金 晶粒细化 异质形核 |
Giran refinement and mechanism of AZ91 alloy with Al4C3 addition |
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| WANG Chun-jian,JIN Qing-lin,JIANG Ye-hua,ZHOU Rong.Giran refinement and mechanism of AZ91 alloy with Al4C3 addition[J].Transactions of Materials and Heat Treatment,2010,31(11). |
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| Authors: | WANG Chun-jian JIN Qing-lin JIANG Ye-hua ZHOU Rong |
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| Affiliation: | WANG Chun-jian1,2,JIN Qing-lin3,JIANG Ye-hua3,ZHOU Rong3(1.Research Center for Analysis and Measurement,Kunming University of Science and Technology,Kunming 650093,China,2.Analytic and Testing Research Center of Yunnan,3.Faculty of Material Science and Engineering,China) |
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| Abstract: | Effect of Al4C3 particles on grain size of AZ91 alloy was investigated through adding Al4C3 into the alloy melts directly.It was shown that grain refining efficiency of Al4 C3 particles was influenced by inoculating conditions.The higher the melt temperature and the longer the holding time,the higher the grain refining efficiency of Al4 C3 particles.Al4 C3 particles didn't act as heterogeneous nucleuses directly but were pushed out in front of liquid /solid interface.The mechanism of grain refinement by Al4... |
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| Keywords: | magnesium alloy grain refinement heterogeneous nucleation |
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