Advertisement

Journal of Mechanical Science and Technology

, Volume 33, Issue 11, pp 5399–5405 | Cite as

Evaluation of tensile shear strength for dissimilar spot welds of Al-Si-Mg aluminum alloy and galvanized steel by delta-spot welding process

  • Young-Gon KimEmail author
  • Dong-Cheol Kim
  • Sung-Min Joo
Article
  • 5 Downloads

Abstract

According to the conventional studies, it was difficult to perform the dissimilar spot welding between aluminum alloy and steel. In this research, delta-spot welding was performed to evaluate the dissimilar weldability and mechanical properties of the Al 6061-T6 and GA440 steel sheets. A spot welding experiment was carried out varying process parameters. Also, the tensile shear strength was evaluated at each condition, and cross-sectional observation of the weld zone was performed with an electron microscope. The strength of the dissimilar spot welds decreased with increasing force, and increased in proportion to the weld time and current. As a test result of the influence of types of the process tapes, PT1407, which has a relatively higher heat input than PT2000, showed higher strength of the dissimilar spot welds. Especially, the Fe-Al intermetallic compounds (IMC) layer was less than 3 μm thick. It was thick at the center of the nugget and thin at the edge depending on the heat input.

Keywords

Dissimilar weldability Intermetallic compound Nugget Process tape Tensile shear strength 

Nomenclature

Q

Heat input of resistance spot welding

I

Welding current in Amperes

R

Electrical resistance in ohms related with material properties and electrode force

T

Welding time in seconds

RM

Bulk resistance of material

RS

Contact resistance between electrode and material surface or the material interface

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Notes

Acknowledgments

Financial support was provided by Korea Ministry of Planning and Budget Foundation through Korea Institute of Industrial Technology (Project Number: EO180009).

References

  1. [1]
    S. P. Kim, T. M. Hong and H. S. Chang, A study on the resistance spot welding of aluminum alloy(I), Journal of KWS, 12 (4) (1996) 127–140.Google Scholar
  2. [2]
    S. M. Cho, Resistance welding and resistance joining technology to Fe-base material of Al-alloy, Journal of KWS, 19 (2) (2001) 14–22.Google Scholar
  3. [3]
    J. L. Song, S. B. Lin, C. L. Yang, G. G. Ma and H. Liu, Spreading behavior and microstructure characteristics of dissimilar metals TIG welding-brazing of aluminum alloy to stainless steel, Mater. Sci. Eng. A, 509 (2009) 31–40.CrossRefGoogle Scholar
  4. [4]
    M. Pouranbari and S. P. H. Marashi, Failure mode transition in AHSS resistance spot welds. Part I. Controlling factors, Mater. Sci. Eng. A, 528 (2011) 8337–8343.CrossRefGoogle Scholar
  5. [5]
    S. Niknejad, L. Liu, M. Y. Lee, S. Esmaeili and N. Y. Zhou, Resistance spot welding of AZ series magnesium alloys: Effects of aluminum content on microstructure and mechanical properties, Mater. Sci. Eng. A, 618 (2014) 323–334.CrossRefGoogle Scholar
  6. [6]
    M. Xia, Z. Tian, L. Zhao and Y. N. Zhou, Fusion zone microstructure evolution of Al-alloyed TRIP steel in diode laser welding, Mater. Trans., 49 (4) (2008) 746–753.CrossRefGoogle Scholar
  7. [7]
    T. Ogura, T. Nishida, Y. Tanaka, H. Nishida, S. Yoshikawa, M. Fujimoto and A. Hirose, Microscale evaluation of mechanical properties of friction stir welded A6062 aluminum alloy/304 stainless steel dissimilar lap joint, Science and Technology of Welding and Joining, 18 (2) (2013) 108–113.CrossRefGoogle Scholar
  8. [8]
    F. A. Mirza, A. Macwan, S. D. Bhole, D. L. Chen and X. G. Chen, Effect of welding energy on microstructure and strength of ultrasonic spot welded dissimilar joints of aluminum to steel sheets, Mater. Sci. Eng. A, 668 (2016) 73–85.CrossRefGoogle Scholar
  9. [9]
    Y. G. Kim, B. J. Jo, J. S. Kim and I. J. Kim, A study on dissimilar welding of aluminum alloy and advanced high strength steel by spot welding process, Int. J. of Precision Engineering and Manufacturing, 18 (1) (2014) 121–126.CrossRefGoogle Scholar
  10. [10]
    N. Ma and H. Murakawa, Numerical and experimental study on nugget formation in resistance spot welding three pieces of high strength steel sheets, Material Processing and Technology, 210 (14) (2010) 2045–2052.CrossRefGoogle Scholar
  11. [11]
    J. Y. Yu, Y. J. Cho, I. S. Chang and S. H. Rhee, Investigation of resistance spot welding for aluminum alloys with spooling process tapes, Journal of KWS, 28 (6) (2010) 15–20.Google Scholar
  12. [12]
    K. Miyamoto, S. Nakagawa, C. Sugi, H. Sakurai and A. Hirose, Dissimilar joining of aluminum alloy and steel by resistance spot welding, SAE, Int. J. of Materials and Manufacturing, 2 (1) (2009) 58–67.CrossRefGoogle Scholar
  13. [13]
    M. R. Arghavani, M. Movahedi and A. H. Kokabi, Role of zinc layer in resistance spot welding of aluminium to steel, Materials and Design, 102 (2016) 106–114.CrossRefGoogle Scholar
  14. [14]
    K. Ikeuchi, Solid state bonding of aluminum alloys to dissimilar metals, KEIKINZOKU, J. of Japan Institute of Light Metals, 46 (6) (1996) 298–306.CrossRefGoogle Scholar
  15. [15]
    Z. Wan, H. P. Wang, M. Wang, B. E. Carlson and D. R. Sigler, Numerical simulation of resistance spot welding of al to zinc-coated steel with improved representation of contact interactions, Int. J. of Heat and Mass Transfer, 101 (2016) 749–763.CrossRefGoogle Scholar
  16. [16]
    Y. G. Kim, I. J. Kim, J. S. Kim, I. Y. Chung and D. Y. Choi, Evaluation of surface crack in resistance spot welds of Zncoated steel, Mater. Trans., 55 (1) (2014) 171–175.CrossRefGoogle Scholar
  17. [17]
    W. Zhang, Weld planning with optimal welding parameters by computer simulations and optimizations, Proceedings of the 6th International Seminar on Advances in Resistance Welding, 22–24 September, Hamburg (2010) 119–127.Google Scholar
  18. [18]
    Y. C. Chen, T. Komazaki, Y. G. Kim, T. Tsumura and K. Nakata, Interface microstructure study of friction stir lap joint of AC4C cast aluminum alloy and zinc-coated steel, Materials Chemistry and Physics, 111 (2008) 375–380.CrossRefGoogle Scholar
  19. [19]
    D. Sun, Y. Zhang, Y. Liu, X. Gu and H. Li, Microstructures and mechanical properties of resistance spot welded joints of 16Mn steel and 6063-T6 aluminum alloy with different electrodes, Materials and Design, 109 (2016) 596–608.CrossRefGoogle Scholar

Copyright information

© KSME & Springer 2019

Authors and Affiliations

  1. 1.Gwangju Ppuri Technology Support CenterKorea Institute of Industrial TechnologyGwangjuKorea
  2. 2.Joining R&D GroupKorea Institute of Industrial TechnologyIncheonKorea
  3. 3.Department of Naval Architecture and Ocean EngineeringChosun UniversityGwangjuKorea

Personalised recommendations