Effect of copper electrode pressure on nugget diameter and mechanical performance of resistance spot welded thin DP800 steel sheets

Authors

  • C. Rajarajan Meenakshi Ramaswamy Engineering College, Thathanur, Tamil Nadu, India
  • Tushar Sonar G. S. Mandal’s Maharashtra Institute of Technology, Aurangabad, Maharashtra, India
  • P. Sivaraj Centre for Materials Joining & Research (CEMAJOR), Annamalai University, Annamalai Nagar, Tamil Nadu, India
  • V. Balasubramanian Centre for Materials Joining & Research (CEMAJOR), Annamalai University, Annamalai Nagar, Tamil Nadu, India

Keywords:

Dual-Phase Steel, Resistance Spot Welding, Tensile Shear Strength, Microstructure, Electrode Pressure

Abstract

DP800 is an advanced high strength steel containing duplex microstructure of ferrite and martensite phases. It is broadly used in automotive structural frame applications owing to its high strength to weight ratio. DP steel is mainly joined by resistance spot welding (RSW) to avoid the problems of solidification cracking and severe HAZ softening. In this study, the effect of copper electrode pressure on nugget diameter and mechanical performance of resistance spot welded 1.2 mm thick DP800 steel sheets are investigated. The tensile shear strength (TSS) properties were evaluated in straight lap (SL-TSS) and cross lap (CL-TSS) joint configuration. Results showed that the DP-800 steel spot joints developed using the electrode pressure of 4.0 MPa exhibited superior SL-TSS of 830 MPa and CL-TSS of 684 MPa. It is attributed to the evolution of finer martensitic needles in nugget zone.

Metrics

Metrics Loading ...

References

Akulwar, S., Akela, A., Kumar, D. S., &Ranjan, M. (2021).Resistance spot welding behavior of automotive steels.Transactions of the Indian Institute of Metals, 74(3), 601-609.

Ambroziak, A., &Korzeniowski, M. (2010).Using resistance spot welding for joining aluminium elements in automotive industry, Archives of Civil and Mechanical Engineering, 10(1), 5-13.

Aslanlar, S., Ogur, A., Ozsarac, U., &Ilhan, E. (2008).Welding time effect on mechanical properties of automotive sheets in electrical resistance spot welding.Materials Design, 29, 1427-1431.

Fonstein, N. (2017). Dual-phase steels. Automotive Steels.Elsevier Publication.

Hernandez, V. H. B., Panda, S. K., Okita, Y., & Zhou, N. Y. (2010). A study on heat affected zone softening in resistance spot welded dual phase steel by nanoindentation. Journal of Materials Science, 45, 1638-1647. https://doi. org/10.1007/s10853-009-4141-0

Kishore, K., Kumar, P., &Mukhopadhyay, G. (2019).Resistance spot weldability of galvannealed and bare DP600 steel.Journal of Materials Processing Technology, 271, 237-248.

Li, L. (2011). Microstructure and Property Control of Advanced High Strength Automotive Steels. In: Weng, Y., Dong, H., Gan, Y. (eds) Advanced Steels. Springer, Berlin, Heidelberg. https://doi. org/10.1007/978-3-642-17665-4_27

Liao, X., Wang, X., Guo, Z., Wang, M., Wu, Y., &Rong, Y. (2010).Microstructures in a resistance spot welded high strength dual phase steel.Materials Characterization, 61, 341-346.

Mazaheri, Y., Kermanpur, A., &Najafizadeh, A. (2014). A novel route for the development of ultra high strength dual phase steels. Materials Science and Engineering A, 619, 1-11.

Nesterova, E. V., Bouvier, S., &Bacroix, B. (2015). Microstructure evolution and mechanicalbehavior of a high strength dual-phase steel under monotonic loading.Materials Characterization, 100, 152-162.

Rajarajan, C., Sivaraj, P., &Balasubramanian, V. (2020). Role of welding current on mechanical properties and microstructural characteristics of resistance spot welded dual phase steel joints. Physics of Metals and Metallography, 121(14), 1447-1454.

Rajarajan, C., Sivaraj, P., Sonar, T., Raja, S., &Mathiazhagan, N. (2022).Resistance spot welding of advanced high strength steel for fabrication of thin-walled automotive structural frames.Forces in Mechanics.7, 100084.

Rajarajan, C., Sivaraj, P., Sonar, T., Raja, S., &Mathiazhagan, N. (2022). Investigation on microstructural features and tensile shear fracture properties of resistance spot welded advanced high strength dual phase steel sheets in lap joint configuration for automotive frame applications. Journal of the Mechanical Behavior of Materials, 31(1), 52-63.

Ramazani, A., Mukherjee, K., Abdurakhmanov, A., Abbasi, M., &Prahl, U. (2015).Characterization of microstructure and mechanical properties of resistance spot welded DP600 steel.Metals, 5(3), 1704-1716.

Santos, R. O., Silveira, L. B., Moreira, L. P., Cardoso, M. C., Silva, F. R. F., Paula, A. S., &Albertacci, D. A. (2019). Damage identification parameters of dual-phase 600-800 steels based on experimental void analysis and finite element simulations. Journal of Materials Research Technology, 8(1), 644-659.

Wan, X., Wang, Y., & Zhang, P. (2014). Effects of welding schedules on resistance spot welding of DP600 steel.ISIJ International, 54, 2375-2379.

Downloads

Published

01-05-2022

How to Cite

Rajarajan, C., Sonar, T., Sivaraj, P., & Balasubramanian, V. (2022). Effect of copper electrode pressure on nugget diameter and mechanical performance of resistance spot welded thin DP800 steel sheets. Manufacturing Technology Today, 21(5-6), 23–30. Retrieved from https://mtt.cmti.res.in/index.php/journal/article/view/33

Issue

Vol. 21 No. 5-6 (2022): May-June 2022

Section

Articles

License

All the articles published in Manufacturing Technology Today (MTT) Journal are held by the Publisher. Central Manufacturing Technology Institute (CMTI) as a publisher requires its authors to transfer the copyright prior to publication. This will permit CMTI to reproduce, publish, distribute, and archive the article in print and electronic form and also to defend against any improper use of the article.