Mechanical properties and microstructure analysis of refilling friction stir welding on 2219 aluminum alloy

金属学报(英文版), 2012, 25(3): 225-234.

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

2.School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

3.School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;Shanghai Key Laboratory of Materials Laser Processing and Modification, Shanghai 200240, China

4.School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;Shanghai Key Laboratory of Materials Laser Processing and Modification, Shanghai 200240, China

5.Shanghai Aerospace Equipments Manufacture, Shanghai 200240, China

6.Shanghai Aerospace Equipments Manufacture, Shanghai 200240, China

基金项目: This work was supported by the National Natural Science Foundation of China(50975176;51035004;51105251)

Mechanical properties and microstructure analysis of refilling friction stir welding on 2219 aluminum alloy

Peilin LI ^1, , Zhongfeng XU ^2, , Chun YU ^3, , Hao LU ^4, , Junshan YAO ^5, , Guoyu CHEN ^6,

1.School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

2.School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

3.School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;Shanghai Key Laboratory of Materials Laser Processing and Modification, Shanghai 200240, China

4.School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;Shanghai Key Laboratory of Materials Laser Processing and Modification, Shanghai 200240, China

5.Shanghai Aerospace Equipments Manufacture, Shanghai 200240, China

6.Shanghai Aerospace Equipments Manufacture, Shanghai 200240, China

Keywords： Aluminium alloy

The 2219 aluminum alloy under refilling friction stir welding (RF-FSW) was investigated.The micrographs showed that the bead could be divided into six zones,and the grain size and shape were greatly different in these zones.According to the microstructure analysis,the weld nugget zone and the shoulder stirring zone consisted of equiaxed grains,while the grains in the heat affected zone were seriously coarsened.It was obvious that bending deformation occurred in the thermo-mechanically affected zone.According to the microhardness analysis,the lowest hardness of the weld was at the thermo-mechanically affected zone,and the microhardness increased with the retraction of the stir-pin.The tensile strength and elongation of the bead were 70％ and 80％ of the base metal,respectively.The tensile strength was slightly different for the stable stage and the retraction stage,while the elongation decreased in the retraction stage.The mechanical properties and microstructure responded to different retraction speed were analyzed,and it showed that the elongation decreasedwith increasing retraction speed.

参考文献

[1]	G. Bussu;P. E. Irving .The role of residual stress and heat affected zone properties on fatigue crack propagation in friction stir welded 2024-T351 aluminium joints[J].International Journal of Fatigue,2003(1):77-88.
[2]	L. Fratini;S. Pasta;A. P. Reynolds .Fatigue crack growth in 2024-T351 friction stir welded joints: Longitudinal residual stress and microstructural effects[J].International Journal of Fatigue,2009(3):495-500.
[3]	S. Bozzi;A. L. Helbert-Etter;T. Baudin;V. Klosek;J. G. Kerbiguet;B. Criqui .Influence of FSSW parameters on fracture mechanisms of 5182 aluminium welds[J].Journal of Materials Processing Technology,2010(11):1429-1435.
[4]	Y. Uematsu;K. Tokaji;Y. Tozaki;T. Kurita;S. Murata .Effect of re-filling probe hole on tensile failure and fatigue behaviour of friction stir spot welded joints in Al-Mg-Si alloy[J].International Journal of Fatigue,2008(10/11):1956-1966.
[5]	Y. Tozaki;Y. Uematsu;K. Tokaji .A newly developed tool without probe for friction stir spot welding and its performance[J].Journal of Materials Processing Technology,2010(6/7):844-851.
[6]	D. G. Hattingh;C. Blignault;T. I. van Niekerk;M. N. James .Characterization of the influences of FSW tool geometry on welding forces and weld tensile strength using an instrumented tool[J].Journal of Materials Processing Technology,2008(1/3):46-57.
[7]	K. Elangovan;V. Balasubramanian .Influences of tool pin profile and welding speed on the formation of friction stir processing zone in AA2219 aluminium alloy[J].Journal of Materials Processing Technology,2008(1-3):163-175.
[8]	Y. Chen;H. Liu;J. Feng .Friction stir welding characteristics of different heat-treated-state 2219 aluminum alloy plates[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1/2):21-25.
[9]	H. J. Liu;H. Fuju;M. Maeda;K. Nogi .Tensile properties and fracture locations of friction-stir-welded joints of 2017-T351 aluminum alloy[J].Journal of Materials Processing Technology,2003(3):692-696.

上一张下一张

计量

下载量()
访问量()

作者相关

在本站搜索
在百度学术搜索
在万方数据库搜索
在CNKI搜索

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网

Mechanical properties and microstructure analysis of refilling friction stir welding on 2219 aluminum alloy

参考文献