王春建,金青林,蒋业华,周荣

• 1:昆明理工大学分析测试研究中心
• 2:云南省分析测试中心
• 3:昆明理工大学材料科学与工程学院

摘要(Abstract)：

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。

关键词(KeyWords)： 镁合金;晶粒细化;异质形核

Abstract:

Keywords:

基金项目(Foundation): 云南省自然科学基金(2007E031M)

作者(Author): 王春建,金青林,蒋业华,周荣

DOI: 10.13289/j.issn.1009-6264.2010.11.013

参考文献(References)：

• [1]Lu L,Dahle A K,Stjohn D H.Grain refinement efficiency and mechanism of aluminum carbide in Mg-Al alloys[J].Scripta Materialia,2005,53(5):517-522.
• [2]Stjohn D H,Ma Q,Easton M A,et al.Grain refinement of magnesium alloys[J].Metallurgical and Materials Transactions A,2005,36(7):1669-1679.
• [3]Ma Q,Cao P.Discussions of grain refinement of magnesium alloys by carbon inoculation[J].Scripta Materialia,2005,52(5):415-419.
• [4]Davis J A,Eastwood L W,Dehaven J C.Grain refinement in magnesium casting alloys[J].Transactions of American Foundrymen’s Association,1945,53:352-362.
• [5]Emley E F.Principles of Magnesium Technology[M].Oxford:Pergamon Press,1966:202-211.
• [6]Kurfman V B.Nucleation catalysis by carbon additions to magnesium alloys[J].Transactions of the Metallurgical Society of AIME,1961,221:540-546.
• [7]Lu L,Dahle A K,Stjohn D H.Heterogeneous nucleation of Mg-Al alloys[J].Scripta Materialia,2006,54(12):2197-2201.
• [8]Nelson C E.Grain size behavior in magnesium casting alloys[J].Transactions of American Foundrymen’s Association,1948,56:1-23.
• [9]Kim Y M,Yim C D,You B S.Grain refining mechanism in Mg-Al base alloys with carbon addition[J].Scripta Materialia,2007,57(8):691-694.
• [10]Mahoney C H,Tarr A L,Legrand P E.A study of factors influencing grain size in magnesium alloys and a carbon inoculation method for grain refinement[C]//AIME Metals Technology.America:AIME Technical Press,1945:1-20.
• [11]Cao P,Ma Q,Stjohn D H.Native grain refinement of magnesium alloys[J].Scripta Materialia,2005,53(7):841-844.
• [12]Haitani T,Tamura Y,Yano E,et al.Grain refining mechanism of high-purity Mg-9mass%Al alloy ingot and influence of Fe or Mn addition on cast grain size[J].Journal of Japan Institute of Light Metals,2001,51(8):403-408.
• [13]Qiu C A,Metselaar R.Solubility of carbon in liquid Al and stability of Al4C3[J].Journal of Alloys and Compounds,1994,216(1):55-60.
• [14]Jin Q L,Eom J P,Lim S G,et al.Grain refining mechanism of a carbon addition method in a Mg-Al magnesium alloy[J].Scripta Materialia,2003,49(11):1129-1132.
• [15]Viala J C,Claveyrolas G,Bosselet F,et al.The chemical behaviour of carbon fibres in magnesium base Mg-Al alloys[J].Journal of Materials Science,2000,35:1813-1825.
• [16]Motegi T.Grain-refining mechanisms of superheat-treatment of and carbon addition to Mg-Al-Zn alloys[J].Materials Science and Engineering A,2005,413-414(15):408-411.

文章评论(Comment)：