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Experimental studies in weld nugget strength of resistance spot-welded 316L austenitic stainless steel sheet

  • T. Jagadeesha
ORIGINAL ARTICLE

Abstract

Resistance spot welding is one of the oldest and effective joining processes which generates heat by sending an electrical current through the sheets at controlled time and pressure to develop a joint at the interface of the sheets. As the demand for spot welding is drastically increased due to the increase in manufacturing of biomedical and automotive components, a detailed study on the quality of weld generated during the resistance spot welding is required. The quality of spot weld is assessed from the tensile shear strength and weld nugget diameter. An attempt is made through this research work, to study the quality of weld developed by the spot welding process of 1.6-mm-thick 316L-type austenitic stainless steel sheets (1.6 + 1.6 mm). The effect of significant process parameters namely heating time and welding current on ultimate tensile shear strength, weld nugget diameter, and failure modes is studied extensively. The critical weld nugget diameter is predicted by utilizing the proposed analytical model to ensure the tearing-type failure under a tensile shear test. Metallographic and SEM fractograph examinations are carried out to characterize the resistance spot welds. Based on the results, it is inferred that the weld nugget size, i.e., diameter and fusion depth, is the controlling factor of ultimate tensile shear strength and the resulting spot weld failure modes.

Keywords

RSW Failure modes Nugget diameter Depth of fusion 316L Sheet 

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References

  1. 1.
    Gould JE (1994) An examination of nugget development during spot welding using both experimental and analytical techniques. Weld J 66(1):1s–10sMathSciNetGoogle Scholar
  2. 2.
    Aslanlar S (2006) The effect of nucleus size on mechanical properties in electrical resistance spot welding of sheets used in automotive industry. Mater Des 27(2):125–131CrossRefGoogle Scholar
  3. 3.
    Akkas N, Varol F, Ferik E, Ilhan E, Ozsarac U, Aslanlar S (2014) Effect of welding current on mechanical properties of welding joints in S235JR(Cu) steel sheets in resistance spot welding. Acta Phys Pol A 125(2):500–502CrossRefGoogle Scholar
  4. 4.
    Charde N (2014) Exploring the electrodes alignment and mushrooming effects on weld geometry of dissimilar steels during the spot welding process. Sadhana 39(Part 6):1563–1572CrossRefGoogle Scholar
  5. 5.
    Zhang H, Hou Y, Zhang J, Qi X, Wang F (2015) A new method for nondestructive quality evaluation of the resistance spot welding based on the radar chart method and the decision tree classifier. Int J Adv Manuf Technol 78(5):841–851CrossRefGoogle Scholar
  6. 6.
    Kianersi D, Mostafaei A, Mohammadi J (2014) Effect of welding current and time on the microstructure, mechanical characterizations, and fracture studies of resistance spot welding joints of AISI 316L austenitic stainless steel. Metall Mater Trans A 45(10):4423–4442CrossRefGoogle Scholar
  7. 7.
    Kong X, Yang Q, Li B, Rothwell G, English R, Ren XJ (2008) Numerical study of strengths of spot-welded joints of steel. Mater Des 29:1554–1561CrossRefGoogle Scholar
  8. 8.
    Nielsen CV, Zhang W, Perret W, Martins PAF, Bay N (2015) Three-dimensional simulations of resistance spot welding. Proc Inst Mech Eng D J Automob Eng 229(7):885–897CrossRefGoogle Scholar
  9. 9.
    Zhigang H, Yuanxum W, Chunzhi L, Chuanyao C (2006) A multi-coupled finite element analysis of resistance spot welding process. Acta Mechanica Solida Sinica 19(1):86–94CrossRefGoogle Scholar
  10. 10.
    Kocabekir B, Kacar R, Gunduz S, Hayat F (2008) An effect of heat input, weld atmosphere and weld cooling conditions on the resistance spot weldability of 316L austenitic stainless steel. J Mater Process Technol 195:327–335CrossRefGoogle Scholar
  11. 11.
    Hamidinejad SM, Kolahan F, Kokabi AH (2012) The modeling and process analysis of resistance spot welding on galvanized steel sheets used in car body manufacturing. Mater Des 34:759–767CrossRefGoogle Scholar
  12. 12.
    Kearns WH (1980) Welding processes, AWS welding handbook, 3, seventh ed. American Welding Society. Published by Macmillan Press Ltd., London, pp 1–55Google Scholar
  13. 13.
    Chao YJ (2003) Failure mode of spot welds: interfacial versus pullout. Sci Technol Weld Join 8(2):133–137Google Scholar
  14. 14.
    Pouranvari M, Asgari HR, Mosavizadch SM, Marashi PH, Goodarzi M (2007) Effect of weld nugget size on overload failure mode of resistance spot welds. Sci Technol Weld Join 12(3):217–225CrossRefGoogle Scholar
  15. 15.
    Radakovic DJ, Tumuluru M (2008) Predicting resistance spot weld failure modes in shear tension tests of advanced high-strength automotive steels. Weld J 87:96s–105sGoogle Scholar
  16. 16.
    Sadasue T, Igi S, Taniguchi K, Ikeda R, Oi K (2016) Fracture behaviour and numerical study of resistance spot welded joints in high-strength steel sheet. Weld Int 30(8):602–613CrossRefGoogle Scholar

Copyright information

© Springer-Verlag London 2017

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringNational Institute of Technology NITCalicutIndia

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