采用光学显微镜、X射线衍射仪、扫描电镜及能谱仪等手段研究了1.0％(质量分数)的Sm变质对ADC12铝合金组织结构的影响.结果表明,加入1.0％的Sm能使合金中α-Al相和共晶硅相均得到明显细化,α-Al相二次枝晶间距由51 μm减小到15 μm,平均晶胞尺寸由90 μm减小到40 μm;共晶硅由粗大的针状变为尺寸较小的短棒状或圆球状,圆整度得到提高；变质后的合金中生成了高熔点Al11Sm3金属间化合物.
参考文献
| [1] | 宋仁国.高强度铝合金的研究现状及发展趋势[J].材料导报,2000(01):20-21,34. |
| [2] | Shin, S.-S.;Kim, E.-S.;Yeom, G.-Y.;Lee, J.-C..Modification effect of Sr on the microstructures and mechanical properties of Al-10.5Si-2.0Cu recycled alloy for die casting[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2012:151-157. |
| [3] | M. Timpel;N. Wanderka;G.S. Vinod Kumar .Microstructural investigation of Sr-modified Al-15 wt%Si alloys in the range from micrometer to atomic scale[J].Ultramicroscopy,2011(6):695-700. |
| [4] | 唐小龙,彭继华,黄芳亮,许德英,杜日升.混合稀土含量对A356铝合金组织结构的影响[J].中国有色金属学报,2010(11):2112-2117. |
| [5] | Weiss J C;Loper C R .Primary silicon in hypereutectic aluminum-silicon casting alloys[J].AFS Transactions,1987,32:51. |
| [6] | Yi H K;Zhang D;Sakata T et al.Microstructures and Larich compounds in a Cu-containing hypereutectic Al-Si alloy[J].Journal of Alloys and Compounds,2003,354(1-2):159. |
| [7] | 石为喜,高波,涂赣峰,李世伟.Nd变质过共晶Al-17.5%Si合金的微观组织和断口形貌[J].中国有色金属学报,2011(04):719-726. |
| [8] | Lu S Z;Hellawell A .The mechanism of silicon modification in aluminum-silicon alloys impurity induced twinning[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1987,11(10):1721. |
| [9] | S. Delsante;R. Raggio;G. Borzone .A Revision of the Al-Rich Region of the Sm-Al Phase Diagram: The Sm_3Al_(11) Phase[J].Journal of Phase Equilibria and Diffusion,2007(3):240-242. |
| [10] | Y.E. Kalay;L.S. Chumbley;M.J. Kramer;I.E. Anderson .Local structure in marginal glass forming Al—Sm alloy[J].Intermetallics,2010(8):1676-1682. |
| [11] | Bramfitt B L .The effect of carbide and nitride additions on the heterogeneous nucleation behavior of liquid iron[J].Metallurgical and Materials Transactions,1970,7(01):1991. |
| [12] | 李全安,李克杰,井晓天,陈君,张兴渊.稀土钐对AZ61合金组织和性能的影响[J].材料热处理学报,2010(01):100-104. |
| [13] | 李桂荣,王宏明,赵玉涛,陈刚,陈登斌,韩剑,戴起勋.稀土钇对7055铝合金熔炼和凝固过程的作用机制[J].稀有金属材料与工程,2010(01):80-84. |
| [14] | Warren B E;Warekois E P .Stacking faults in cold worked alpha-brass[J].Acta Metallurgica,1955,3(05):473. |
| [15] | Chang JY.;Ko HS. .Twin probability of eutectic Si in rare earth modified Al-7wt%Si alloy[J].Journal of Materials Science Letters,2000(3):197-199. |
| [16] | Kazuhiro Nogita;John Drennan;Arne Kristian Dahle .Evaluation of Silicon Twinning in Hypo-Eutectic Al-Si Alloys[J].Materials transactions,2003(4):625-628. |
| [17] | Chang JY.;Choi CS.;Moon IG. .Refinement of cast microstructure of hypereutectic Al-Si alloys through the addition of rare earth metals[J].Journal of Materials Science,1998(20):5015-5023. |
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