在空气中和水下对AZ91镁合金铸造板材进行搅拌摩擦加工,并对材料的微观组织和力学性能进行了分析测试.研究结果表明:由于水的强制冷却作用,水下搅拌摩擦加工板的搅拌区面积小于空气中加工板,两种板材搅拌区的微观组织均得到了显著细化,平均晶粒尺寸分别为1.9μm和3.5μm；热机影响区均形成了纤维状组织,且水下搅拌摩擦加工板的组织更为细小；空气中加工板的热影响区出现了组织粗化,而水下加工板的热影响区的晶粒尺寸与母材相当.两种加工工艺均使第二相β-Mg17Al12由原始铸态组织中连续网状变为颗粒状.由于水下加工板的组织更为细小,其硬度、抗拉强度和伸长率较空气中搅拌摩擦加工板高.
参考文献
| [1] | Valiev RZ.;Alexandrov IV.;Islamgaliev RK. .Bulk nanostructured materials from severe plastic deformation [Review][J].Progress in materials science,2000(2):103-189. |
| [2] | 郭强,严红革,陈振华,张辉.多向锻造工艺对AZ80镁合金显微组织和力学性能的影响[J].金属学报,2006(07):739-744. |
| [3] | 康志新,彭勇辉,赖晓明,李元元,赵海东,张卫文.剧塑性变形制备超细晶/纳米晶结构金属材料的研究现状和应用展望[J].中国有色金属学报,2010(04):587-598. |
| [4] | 任淑荣,马宗义,陈礼清.搅拌摩擦焊接及其加工研究现状与展望[J].材料导报,2007(01):86-92. |
| [5] | Z.Y. MA .Friction Stir Processing Technology: A Review[J].Metallurgical and materials transactions. A, physical metallurgy and materials science,2008(3):642-658. |
| [6] | THOMAS W M;NICHOLAS E D;NEEDHAM J C et al.Friction stir butt welding[P].United States Patent,5460317,1995. |
| [7] | Mishra RS;Ma ZY .Friction stir welding and processing[J].Materials Science & Engineering, R. Reports: A Review Journal,2005(1/2):III-0. |
| [8] | A.H. Feng;Z.Y. Ma .Enhanced mechanical properties of Mg-Al-Zn cast alloy via friction stir processing[J].Scripta materialia,2007(5):397-400. |
| [9] | P. Cavaliere;P. P. De Marco .Superplastic behaviour of friction stir processed AZ91 magnesium alloy produced by high pressure die cast[J].Journal of Materials Processing Technology,2007(1/3):77-83. |
| [10] | 吕勤云,沙桂英,王洪顺.AZ91镁合金搅拌摩擦加工后的组织与性能[J].航空材料学报,2008(04):27-30. |
| [11] | P. Asadi;M. K. Besharati Givi;G. Faraji .Producing Ultrafine-Grained AZ91 from As-Cast AZ91 by FSP[J].Materials and Manufacturing Processes,2010(10/12):1219-1226. |
| [12] | SU J Q;NELSON T W;STERLING C J .Friction stir processing of large-area bulk UFG aluminum alloys[J].Scripta Materialia,2005,52(02):135-140. |
| [13] | Hofmann DC;Vecchio KS .Submerged friction stir processing (SFSP): An improved method for creating ultra-fine-grained bulk materials[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):234-241. |
| [14] | ZHANG D T;SUZUKI M;MARUYAMA K .Microstructura1 evolution of a heat-resistant magnesium alloy due tofriction sir welding[J].Scripta Materialia,2005,52(09):899-903. |
| [15] | 钟群鹏;赵子华.断口学[M].北京:高等教育出版社,2006 |
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