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Sadhana

, Volume 39, Issue 6, pp 1563–1572 | Cite as

Exploring the electrodes alignment and mushrooming effects on weld geometry of dissimilar steels during the spot welding process

  • NACHIMANI CHARDEEmail author
Article

Abstract

The class two of RWMA electrode caps has very common application-purpose for the welding of steels and withstand for high thermal application on wrought cast. It has been experimentally used to weld carbon and stainless steels up to 900 weld attempts using AC waveform, C-type JPC 75 kVA, Japanese made spot welder. So the electrode alignments and resulting mushrooming effects are finally analysed in this research as well as the weld geometry of dissimilar (carbon and stainless) steels. When considering such weld joints, the heat imbalances are very interesting factors on spot welding research and therefore I have simulated the dissimilar weld joints using Ansys 14. Initially, it was simulated and later those results are compared with real welded samples. The common welded regions such as: fusion zones, heat affected zones, heat extended zones and base metals are all well-noticed for carbon steel sides but not for stainless steel sides. Besides, the electrode mushrooming effect on both sides of electrodes are not parallel deterioration and it has some demerits on internal structure indeed. Some of the dissimilar welded samples and electrode caps are eventually underwent metallurgical test to identify the improper alignment.

Keywords

Spot welding dissimilar joints electrode deformation electrode mushrooming. 

Notes

Acknowledgements

Author would like to thank the Ministry of Science, Technology and Innovation of Malaysia (MOSTI) for financial support. This research outcome is a part ofMr Nachimani’s PhD research work.

References

  1. Aravinthan A and Nachimani C 2011a Analysis of spot weld growth on mild and stainless steel. Welding Journal 143–147Google Scholar
  2. Aravinthan A and Nachimani C 2011b Metallurgical study of spot welds growth on mild steel with 1 mm and 2 mm thicknesses. Journal - The Institution of Engineers Malaysia 72: 36–42Google Scholar
  3. Bower R J, Sorensen C D and Eager T W 1990 Electrode geometry in resistance spot welding. Welding Journal 45–51Google Scholar
  4. Cha B W and Na S J 2003 A study on the relationship between welding conditions and residual stress of resistance spot welded 304-type stainless steels. J. Manufactur. Syst. 22(31)Google Scholar
  5. Chang B H et al 2006 Effect of forging force on fatigue behavior of spot welded joints of aluminum alloy 5182. J. Manufactur. Sci. Eng. 4: 345–352Google Scholar
  6. Chen Z, Zhou Y and Scotchmer N 2005 Coatings on resistance welding electrodes to extend life. SAE International 1–4Google Scholar
  7. Dursun O and Zyurek 2008 An effect of weld current and weld atmosphere on the resistance spot weld ability of 304l austenitic stainless steel. Mater. Design 29: 597–603CrossRefGoogle Scholar
  8. Fukumoto Shinji, Kana Fujiwara, Shin Toji and Atsushi Yamamoto 2008 Small Scale Resistance Spot Welding of Austenitic Stainless Steels. Mater. Sci. Eng. A 492: 243–249CrossRefGoogle Scholar
  9. Jamasri M N, Ilman R, Soekrisno and Triyono 2011 Corrosion fatigue behaviour of RSW dissimilar metal welds between carbon steel and austenitic stainless steel with different thickness. Procedia Engineering 10: 649–654Google Scholar
  10. Marashi P, Pouranvari M, Amirabdollahian S, Abedi A and Goodarzi M 2008 Microstructure and failure behavior of dissimilar resistance spot welds between low carbon galvanized and austenitic stainless steels. Mater. Sci. Eng. A 175–180Google Scholar
  11. Martín Óscar, Pilar De Tiedra, Manuel López, Manuel San-Juan, Cristina García, Fernando Martín, and Yolanda Blanco 2009 Quality prediction of resistance spot welding joints of 304 austenitic stainless steel. Materials and Design 68–77Google Scholar
  12. Mehdi M H, Abadi A and Pouranvari M 2008 Correlation between macro/micro structure and mechanical properties of dissimilar rsw of AISI 304 austenitic stainless steel and AISI 1008 low carbon steel. Scientific paper of Association of Metallurgical Engineers of Serbia 2: 56–63Google Scholar
  13. Nachimani C 2012 Spot weld growth on medium carbon steel (Part 1). Int. J. Mech. Mater. Eng. 7(1): 36–40Google Scholar
  14. Rao Z H, Liao S M, Tsai H L, Wang P C and Stevenson R 2009 Mathematical modeling of electrode cooling in resistance spot welding. Welding Journal 111–119Google Scholar
  15. Shamsul J B and Hisyam M M 2007 Study of spot welding of austenitic stainless steel type 304. J. Appl. Sci. Res. 3(11): 1494–1499Google Scholar
  16. Yeung K S and Thornton P H 1999 Transient thermal analysis of spot welding electrodes. Welding Journal 1–6Google Scholar
  17. Yuhang Yang, Xilong Q, Yiping Luo and Aimin Yang 2011 Effect of resistance spot welding parameters on the austenitic stainless steel 304 grade by using 23 factorial designs. Adv. Mater. Res. 216: 666–670CrossRefGoogle Scholar

Copyright information

© Indian Academy of Sciences 2014

Authors and Affiliations

  1. 1.Department of Mechanical, Material and Manufacturing EngineeringThe University of Nottingham Malaysia CampusSemenyihMalaysia
  2. 2.Department of Mechanical Engineering, Faculty of EngineeringUniversity of MalayaKuala LumpurMalaysia

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