Abstract
Among the AHSS, the dual-phase (DP) steels have been the subject of particular attention owing to their good combination of high strength and ductility and recent study focus on the weldability of these alloys. Resistance spot welding (RSW) is the primary sheet metal lap joining process in the manufacture of automotive assemblies. However, AHSS in RSW has revealed a number of problems that are a concern to the increased adoption of this range of alloys. Friction stir spot welding (FSSW) has been developed as an extension of friction stir welding (FSW). During FSSW, the rotating tool penetrates the sheets being weld and is then retracted producing a stir zone region that comprises a fine dynamically recrystallized microstructure. Solid-state metallurgical bonding was produced using a range of plunge rate, plunge depth, and tool rotational speed. The objective of this work is to compare the microstructure and mechanical properties on DP780 AHSS (1.6 mm thick) spot welds conducted using both process. The hardness, microstructure, failure mode, and bound area were examined. The results show that RSW has higher strength and bound area: the FSSW with decolorized advantage. Based on these results, we can provide the direction to choose the appropriate weld method.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Tarasankar DebRoy SAD, DuPont JN, Koseki T, Bhadeshia HK (2013) Trends in Welding Research 2012: Proceedings of the 9th International Conference. ASM International, 1116
Ghosh PK, Gupta PC, Pal OM, Avtar R, Jha BK, Dwivedi VS (1993) Influence of weld thermal cycle on properties of flash butt welded Mn-Cr-Mo dual phase steel. ISIJ Int 33(7):807–815
Schultz RA (2007) Metallic material trends for North American light vehicles, in great design in steel semina. American Iron and Steel Institute, South-field
Horvath C (2007) Material challenges facing the automotive and steel industries from globalization, in Great Design in Steel Seminar. American Iron and Steel Institute, South-field
Marya M, Gayden XQ (2005) Development of requirements for resistance spot welding dual-phase (DP 600) steels part 1—the cause of interfacial fracture. Weld J 84:172-s–182-s
Feng Z, Santella ML, Steel RJ, Packer SM, Pan T, Kuo M, Bhatnagar RS (2005) Friction stir spot welding of advanced high-strength steels—a feasibility study. In: Proc. SAE Word Cong. Exhib. 2005, April Detroit, MI, USA,
Khan MJ, Kuntz ML, Su P, Gerlich A, North T, Zhou Y (2007) Resistance and friction stir spot welding of DP 600: a comparative study. Sci Technol Weld Join 12:175–182
Tawadea G, Boudreau G (2004) Steel Seminar. February 2004, American Iron and Steel Institute: Detroit. p. 2–7
(2003) Mazda develops world’s first aluminum joining technology using friction heat. Available from: http://www.mazda.com/publicity/release/200302/0227e.html
Iwashita T (2003) Method and apparatus for joining, U. Patent, Editor. USA
Allen CD, Arbegast WJ (2005) Evaluation of friction stir spot welds in 2024 aluminum. In: SAE Technical, Society of Automotive Engineers
Nagel GL, Lee A (1998) A new approach to spot welding feedback control, in SAE Technical. p. No 880277
Song QF, Bay N, Zhang W (2005) An experimental study determines of the electrical contact resistance in resistance welding. Weld J 84(5):73-s–76-s
Harlin N, Jones TB, Parker JD (2003) Weld growth mechanism of resistance spot welds in zinc coated steel. J Mater Process Technol 143–144:448–153
Acknowledgements
We thank the materials’ supports from China-Steel Company and China Motor Corporation, and are grateful to Dr. C. A. Hsu, Dr. Y. C. Yang and I. H. Wang for assistance with metallurgy observed.
Funding
This research was supported by Metal Industries Research and Development Centre, Kaohsiung, Taiwan, ROC.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of interest
The authors declare that they have no conflict of interest.
Rights and permissions
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
About this article
Cite this article
Hsu, TI., Wu, LT. & Tsai, MH. Resistance and friction stir spot welding of dual-phase (DP 780)—a comparative study. Int J Adv Manuf Technol 97, 2293–2299 (2018). https://doi.org/10.1007/s00170-018-2056-0
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00170-018-2056-0