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A Study on the Characteristic of Weld Joint and Tensile Fracture of SUS304 and Cu High-Speed Dissimilar Lap Welds by Single Mode Fiber Laser

싱글모드 파이버 레이저를 이용한 SUS304와 Cu의 고속 겹치기 용접에서 접합부 및 인장시험 파단부의 특성에 관한 연구

  • Received : 2014.11.16
  • Accepted : 2014.12.30
  • Published : 2014.12.31

Abstract

To develop and understand dissimilar metals joining of Stainless steel and Copper, ultra-high speed laser lap welding was studied using single mode fiber laser in this study. SUS304 and Cu have large differences in materials properties, and Cu and Fe have no intermetallic compounds by typical binary phase of Cu and Fe system. In this study, ultra-high speed lap welds of SUS304 and Cu dissimilar metals using single-mode fiber laser was generated, and weldability of the weld fusion zone was evaluated using a tensile shear test. To understand the phenomenon of tensile shear load, weld fusion zone of interface weld area and fracture parts after tensile shear test were observed using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) analysis system. And it was confirmed that Cu was easily melting and penetrating in the grain boundaries of SUS304 because of low melting temperature. And high thermal conductivity of copper occurred dissipate heat energy rapidly. These properties cause the solidification cracking in weld zone.

Keywords

SUS304;Cu;Dissimilar welding;Single mode fiber laser;Tensile shear test

References

  1. S.J. Lee, H. Nakamura, Y. Kawahito and Seiji Katayama: Effect of welding speed on microstructural and mechanical properties of laser lap weld joints in dissimilar Al and Cu sheets, Science and Technology of Welding and Joining, 19-2 (2014), 111-118 https://doi.org/10.1179/1362171813Y.0000000168
  2. Su-Jin Lee, Seiji Katayama and Jong-Do Kim: Microstructural behavior on weld fusion zone of Al-Ti and Ti-Al dissimilar lap welding using single-mode fiber laser, Journal of Korean Society of Marine Engineering, 38-2 (2014), 133-139 https://doi.org/10.5916/jkosme.2014.38.2.133
  3. Su-Jin Lee, Seiji Katayama and Jong-Do Kim: Weldability of SUS304 and Ti Dissimilar Welds with Various Welding Speed using Single Mode Fiber Laser, Journal of The Korean Welding and Joining Society, 31-5 (2013), 54-61
  4. Su-Jin Lee and Jong-Do Kim: Mechanical properties of Cu and Ni dissimilar welds by high welding speed using single-mode fiber laser, Journal of The Korean Welding and Joining Society, 32-3 (2014), 37-42 https://doi.org/10.5781/JWJ.2014.32.2.37
  5. Shuhai Chen, Jihua Huang, Jun Xia, Hua Zhang and Xingke Zhao: Microstuctural characteristics of stainless steel/copper dissimilar joint made by laser welding, Metallurgical and Materials Transactions A, 44A (2013), 3690-3696
  6. Rakesh Chaudhari, Riddhish Parekh and Asha Ingle: Reliability of dissimilar metal joints using fusion welding : A Review, International Conference on Machine Learning, Electrical and Mechanical Engineering (ICMLEME'2014), Jan. 8-9, 2014 Dubai (UAE), 98-104
  7. Qing Chen and Zhanpeng Jin: The Fe-Cu System: A Thermodynamic Evaluation, Metallurgical and Materials Transactions A, 26A (1995), 417-426
  8. John F. Ready : LIA Handbook of Laser Materials Processing, Laser Institute of America Magnolia Publishing Inc., (2001)
  9. S. D. Meshram, T. Mohandas and G. Madhusudhan Reddy: Friction welding of dissimilar pure metals, Journal of Materials Processing Technology, 184 (2007), 330-337 https://doi.org/10.1016/j.jmatprotec.2006.11.123
  10. Z. Sun and R. Karppi : The application of electron beam welding for the joining of dissimilar metals: an overview, Journal of Materials Processing Technology, 59 (1996), 257-267 https://doi.org/10.1016/0924-0136(95)02150-7
  11. G. Phanikumar, P. Dutta and Chattopadhyay : Continuous welding of Cu-Ni dissimilar couple using $CO_2$ laser, Science and Technology of Welding and Joining, 10-2 (2005), 158-166 https://doi.org/10.1179/174329305X36043