+Advanced Search
MICROSTRUCTURE AND FAILURE MECHANISMS OF REFILL FRICTION STIR SPOT WELDED 7475 ALUMINUM ALLOY JOINTS
Affiliation:

Beijing University of Technology

  • Article
  • | |
  • Metrics
  • |
  • Reference [25]
  • |
  • Related [12]
  • | | |
  • Comments
    Abstract:

    The 7475 aluminum alloy backfill friction stir spot welding is studied in this paper. Firstly, the 2mm 7475 aluminum alloy is welded by different process parameters, then the surface and cross section of the joint are observed, and the hardness and tensile shear test of the sample are carried out. The results show that the joint can be divided into four parts according to the weld microstructure, and the grain size of different parts is different. Hook, holes and unjointed microstructures due to poor fluidity of the material are found in the microstructure. At the same time, the hardness of the base metal zone and stirring zone is significantly higher than that of the heat affected zone and the thermo-mechanically affected zone; in addition, the highest hardness and tensile shear strength of the joint vary with welding tool rotation speed land the depth of the sleeve. However, the effect of the stirring sleeve movement rate on the mechanical properties of the solder joint is not obvious.

    Reference
    [1] Liu Zhihua (刘志华), Zhao Bing (赵兵), Zhao Qing (赵青). Missiles and space vehicles(导弹与航空运载技术) [J], 2002, (2):63-68
    [2] He Diqiu (贺地求), Deng Hang (邓航), Zhou Pengzhan (周鹏展). Tansactions of the China Welding Institution(焊接学报) [J], 2007(09):13-16
    [3] Fu Chunkun (付春坤), Bai Gang (白钢), Wang Hongbin (王红宾), Hu Yazhen (胡亚真). AviationSPrecisionSManufacturingSTechnology (航空精密制造技术)[J],2012.(03):49-51
    [4] Wang Ting (王廷), Zhu Danyang (朱丹阳), Liu huiJie (刘会杰), Feng JiCai (冯吉才). Transactions of The China Welding Institution(焊接学报) [J]..2009, (08):109-112
    [5] Y. Uematsu, K. Tokaji, Y. Tozaki, T. Kurita, S. Murata. International Journal of Fatigue [J], 2008, 30(10-11):1956-1966
    [6] S.G. Arul, S.F. Miller, G.H. Kruger, T.Y. Pan, P.K. Mallick, A. J. Shih. Science and Technology of Welding and Joining [J],2008,13(7):629-637
    [7] Y. H. Yin, N. Sun, T. H. North, S. S. Hu. Journal of Materials Processing Technology[J], 2010, 210(14):2062-2070
    [8] Cao J Y, Wang M, Kong L, et al. Journal of Materials Processing Technology[ J], 2016, 230:254-262
    [9] M. Fujimoto, S. Koga, N. Abe, Y. Sato, H. Kokawa. Welding International [J], 2009, 23(6):403-410
    [10] T. Rosendo, B. Parra, M. A. D. Tier, A. A. M. Da Silva, J. F. Dos Santos, T. R. Strohaecker, N. G. Alcantara. Materials and Design [J],2011, 32(3):1094-1100
    [11] H. Badarinarayan, Q. Yang, S. Zhu. International Journal of Machine Tools and Manufacture [J], 2009, 49(2):142-148
    [12] Shen ZK, Yang XQ, Zhang ZH, Cui L, Li TL. Materials and Design[J],2012; 44:476–86
    [13] S. Hirasawa, H. Badarinarayan, K. Okamoto, T. Tomimura, T. Kawanami. Journal of Materials Processing Technology [J],2010, 210(11):1455-1463
    [14] Y. Bozkurt, M. K. Bilici. Materials and Design [J],2013, 51:513-521
    [15] Uematsu Y, Tokaji K, Tozaki Y, Kurita T, Murata S. International Journal of Fatigue[J]. 2008; 30:1956–66
    [16] Rosendo T, Parra B, Tier MAD, da Silva AAM, dos Santos JF, Strohaecker TR,et al. Materials and Design[J],2011; 32:1094–100
    [17] Zhao Y Q, Liu H J, Lin Z, et al. Science and Technology of Welding and Joining[ J], 2014, 19(7):617-622
    [18] Shen Z, Yang X, Yang S, et al. Materials and Design[ J], 2014, 54(2):766-778
    [19] Cao J Y, Wang M, Kong L, et al. Materials Characterization [J], 2017, 128:54-62
    [20] ISO 14273. Specimen Dimensions and Procedure for Shear Testing Resistance Spot, Seam and Embossed Projection Welds[S]. 2000
    [21] Y. Zhao(赵运强). Asymmetric Refilled FSSW Forming Characteristics and Joint Microstructure/Properties of Ultra-high Strength Aluminum Alloy(超高强铝合金非对称回填式FSSW成形特征与接头组织性能) [D]. Harbin: Harbin Institute of Technology,2015
    [22] Zhao, Y.Q., et al. Materials and Design[J], 2014. 62: p. 40-46
    [23] Badarinarayan H, Shi Y, Li X, Okamoto K. International Journal of Machine Tools and Manufacture[J],2009, 49:814–23
    [24] Feng AH, Chen DL, Ma ZY. Microstructure and cyclic deformation behavior of a friction-stir-welded 7075 Al alloy. Metallurgical and Materials Transactions A ,2010;41A:957–71
    [25] Hayat F. Materials Science and Engineering A [J], 2012,556(3):834-843
    Cited by
    Comments
    Comments
    分享到微博
    Submit
Get Citation

[Lu Zhenyang, Gong Wentao, Chen Shujun, Yuan Tao, Li xiaoxu. MICROSTRUCTURE AND FAILURE MECHANISMS OF REFILL FRICTION STIR SPOT WELDED 7475 ALUMINUM ALLOY JOINTS[J]. Rare Metal Materials and Engineering,2019,48(4):1267~1274.]
DOI:10.12442/j. issn.1002-185X.20180945

Copy
Article Metrics
  • Abstract:855
  • PDF: 1267
  • HTML: 149
  • Cited by: 0
History
  • Received:September 12,2018
  • Revised:September 28,2018
  • Adopted:September 29,2018
  • Online: May 13,2019