使用往复挤压细化Mg-4Al-2Si (AS42)合金组织,利用OM,SEM和TEM研究Mg2 Si颗粒形貌和分布特征.结果表明,铸态AS42合金中Mg2Si颗粒呈共晶汉字状和初生块状.共晶Mg2 Si经2道次往复挤压后全部破碎,且分布均匀.经6道次挤压后初生Mg2 Si颗粒全部破碎,细小的Mg2 Si颗粒已基本球化.往复挤压合金中Mg2Si颗粒尺寸遵循Weibull分布,颗粒平均尺寸、标准差和相对密度随挤压道次增加而提高,经过8道次挤压后分别为1.3μm、0.7μm和540％.
参考文献
| [1] | EASTON M;SONG W;ABBOTT T .A comparison of the deformation of magnesium alloys with aluminium and steel in tension,bending and buckling[J].Materials & Design,2006,27(10):935-946. |
| [2] | ZHANG Jin-shan,DU Hong-wei,LU Bin-feng,ZHANG Yan,LIANG Wei,XU Chun-xiang,LU Feng-lei.Effect of Ca on crystallization of Mg-based master alloy containing spherical quasicrystal[J].中国有色金属学会会刊（英文版）,2007(02):273-279. |
| [3] | Guo XF;Remennik S;Xu CJ;Shechtman D .Development of Mg-6.0%Zn-1.0%Y-0.6%Ce-0.6%Zr magnesium alloy and its microstructural evolution during processing[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):266-273. |
| [4] | Peng QM;Wu YM;Fang DQ;Meng J;Wang LM .Microstructures and mechanical properties of Mg-8Gd-0.6Zr-xNd (x=0, 1, 2 and 3 mass%) alloys[J].Journal of Materials Science,2007(11):3908-3913. |
| [5] | Tamura D;Nagai R;Sugimoto K;Udono H;Kikuma I;Tajima H;Ohsugi IJ .Melt growth and characterization of Mg2Si bulk crystals[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,2007(22):8272-8276. |
| [6] | Chong Li;Yuying Wu;Hui Li .Microstructural formation in hypereutectic Al-Mg_2Si with extra Si[J].Journal of Alloys and Compounds,2009(1/2):212-216. |
| [7] | L. Wang;X.Y. Qin;W. Xiong;X.G. Zhu .Fabrication and mechanical properties of bulk nanocrystalline intermetallic Mg2Si[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(1-2):216-222. |
| [8] | Q.D. Qin;Y.G. Zhao;C. Liu .Strontium modification and formation of cubic primary Mg_2Si crystals in Mg_2Si/Al composite[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2008(1/2):142-146. |
| [9] | QIN Q;ZHAO Y .Nonfaceted growth of intermetallic Mg2Si in Al melt during rapid solidification[J].Journal of Alloys and Compounds,2008,462(01):28-31. |
| [10] | WANG Liping,GUO Erjun,MA Baoxia.Modification effect of lanthanum on primary phase Mg2Si in Mg-Si alloys[J].稀土学报（英文版）,2008(01):105-109. |
| [11] | R. Hadian;M. Emamy;N. Varahram .The effect of Li on the tensile properties of cast Al-Mg_2Si metal matrix composite[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):250-257. |
| [12] | Wang HY;Wang W;Zha M;Zheng N;Gu ZH;Li D;Jiang QC .Influence of the amount of KBF4 on the morphology of Mg2Si in Mg-5Si alloys[J].Materials Chemistry and Physics,2008(2/3):353-358. |
| [13] | ZHA M;WANG H;XUE P et al.Microstructural evolution of Mg-5Si-1Al alloy during partial remelting[J].Journal of Alloys and Compounds,2009,472(1-2):18-22. |
| [14] | LEE S;CHEN Y;WANG H et al.On mechanical properties and superplasticity of Mg-15Al-1Zn alloys processed hy reciprocating extrusion[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2007,464:76-84. |
| [15] | X. F. Guo;D. Shechtman .Reciprocating extrusion of rapidly solidified Mg-6Zn-1Y-0.6Ce-0.6Zr alloy[J].Journal of Materials Processing Technology,2007(0):640-644. |
| [16] | 宋佩维,井晓天,郭学锋.往复挤压Mg-4Al-2Si镁合金的组织细化与力学性能[J].中国有色金属学报,2007(01):111-117. |
| [17] | Shih-Wei Lee;Jien-Wei Yeh .Superplasticity of 5083 alloys with Zr and Mn additions produced by reciprocating extrusion[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(0):409-419. |
| [18] | 叶永南,刘君,郭学锋,徐春杰,张忠明.热力耦合数值模拟往复挤压AZ31成形过程[J].兵器材料科学与工程,2007(06):10-13. |
| [19] | E. J. Guo;B. X. Ma;L. P. Wang .Modification of Mg{sub}2Si morphology in Mg-Si alloys with Bi[J].Journal of Materials Processing Technology,2008(1/3):161-166. |
| [20] | 王栓柱.金属疲劳[M].福州:福建科学技术出版社,1985:268-291. |
| [21] | 魏建锋;赵康;鄢君辉.动载和静载下切口构件的性能及预测[M].西安:陕西科学技术出版社,2001:112. |
| [22] | 宋佩维 .往复挤压Mg-Al-Si合金的组织、性能及强化机制[D].西安理工大学,2007. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%