采用光学显微镜、扫描电子显微镜、透射电子显微镜、拉伸实验机和显微硬度计对6005A铝合金搅拌摩擦焊接头的微观组织及力学性能进行了研究.结果表明:焊核区为细小的等轴晶,几乎所有粒子溶于基体；热机械影响区呈现为被拉长的畸变晶粒,且存在大量的位错；热影响区的组织明显粗化,处于过时效状态.与母材相比,搅拌摩擦焊接头的强度及伸长率均有下降趋势,且接头出现软化,最小硬度值出现在前进侧的热影响区内.搅拌头旋转速率为1200r/min、焊接速率为200mm/min时可获得优质接头,抗拉强度达到母材强度的72％,伸长率达到母材的69％.
参考文献
| [1] | 刘静安.轨道车辆用大型铝合金型材的开发评估及挤压工艺特点[J].四川有色金属,2001(01):4-14. |
| [2] | 周振丰.焊接冶金学(金属焊接性)[M].北京:机械工业出版社,1996:125-135. |
| [3] | Mishra RS;Ma ZY .Friction stir welding and processing[J].Materials Science & Engineering, R. Reports: A Review Journal,2005(1/2):III-0. |
| [4] | Bo Li;Yifu Shen;Weiye Hu .The study on defects in aluminum 2219-T6 thick butt friction stir welds with the application of multiple non-destructive testing methods[J].Materials & design,2011(4):2073-2084. |
| [5] | C. Genevois;A. Deschamps;P. Vacher .Comparative study on local and global mechanical properties of 2024 T351, 2024 T6 and 5251 O friction stir welds[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1/2):162-170. |
| [6] | Gaafer, A.M.;Mahmoud, T.S.;Mansour, E.H. .Microstructural and mechanical characteristics of AA7020-O Al plates joined by friction stir welding[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2010(27/28):7424-7429. |
| [7] | ZANDBERGEN H W;ANDERSEN S J;JANSEN J .Structure determination of Mg5Si6 particles in Al by dynamic electron diffraction studies[J].Science,1997,277(5330):1221-1225. |
| [8] | 杨文超,汪明朴,盛晓菲,张茜,王正安.轨道交通车辆用6005A合金板材时效析出及硬化行为研究[J].金属学报,2010(12):1481-1487. |
| [9] | FRIGAARD AE;GRONG AE;MIDLING O T .A process model for stir welding of age hardening aluminum alloys[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,2001,32(05):1189-1200. |
| [10] | Y.S.Sato;H.Kodawa .Microstructural evolution of 6063 aluminum during friction-stir welding[J].Metallurgical and materials transactions. A, physical metallurgy and materials science,1999(9):2429-2437. |
| [11] | W. B. Lee;Y. M. Yeon;S. B. Jung .Evaluation of the microstructure and mechanical properties of friction stir welded 6005 aluminum alloy[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2003(11):1513-1518. |
| [12] | Birol Y .DSC analysis of the precipitation reaction in AA6005 alloy[J].Journal of thermal analysis and calorimetry,2008(3):977-981. |
| [13] | M. Wade;A. P. Reynolds .Friction stir weld nugget temperature asymmetry[J].Science and Technology of Welding and Joining,2010(1):64-69. |
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%