Considerations Regarding Friction Stir Welding of Stainless Steels

Abstract:

Due to their extraordinary qualities, X5CrNi18-10 (AISI 304L) and X3CrNiMo17-13-3 (AISI 316) stainless steels are among the most used materials in engineering applications with use in priority areas. This also involves finding new solutions for joining this type of metals, effective alternatives to the widely used conventional welding processes.The paper presents the approaches and results obtained at international level for the FSW welding of X5CrNi18-10 and X3CrNiMo17-13-3 stainless steels.The ISIM results are also presented for the FSW butt welding of X5CrNi18-10 stainless steel plates, 4.0 mm and 1.5 mm thick. Data regarding the materials to be welded, the characteristics of the welding tool and the technological process parameters are presented: the rotation speed of the welding tool and the welding speed.When monitoring the welding process, a method was used that is based on an innovative solution based on the use of the infrared thermographic technique, patented by ISIM Timisoara.When welding FSW in inert gas environment FSW-IG, an innovative technical solution for applying the method was used (submitted for patenting), a method that allows monitoring the process in the case of FSW-IG as well. The results of the evaluation process of the welded joints are also presented: referring to metallographic analyzes at macro and microscopic level, micro-hardness, tensile and bending tests.The very good results obtained internationally, but also those obtained at ISIM Timisoara, represent solid arguments that the FSW process can be applied with very good results for welding of X5CrNi18-10 and X3CrNiMo17-13-3 stainless steels.

• Periodical: Defect and Diffusion Forum (Volume 416)
• Pages: 31-41
• DOI: https://doi.org/10.4028/p-0m20yj
• Online since: May 2022
• Authors: Radu Cojocaru*, Lia-Nicoleta Botila, Horia Florin Daşcău, Victor Verbiţchi
• Keywords: FSW Welding, Stainless Steel

References

[1] C. Meran, O. E. Canyurt, Friction stir welding of austenitic stainless steels, Journal of achievements in materials and manufacturing engineering, Vol.43, Issue 1, November (2010).

[2] C. Meran, Joint strength of friction stir welded AISI 304 austenitic stainless steel, International Journal of Materials research, 104(12):1197-1204, December (2013).

DOI: 10.3139/146.110975

[3] Arshad NoorSiddiquee, Noor ZamanKhan - Friction stir welding of austenitic stainless steel: a study on microstructure and effect of parameters on tensile strength. Materials Today, Volume 2, Issues 4–5, , Pages 1388-1397 (2015).

DOI: 10.1016/j.matpr.2015.07.058

[4] Arshad Noor Siddiquee, Sunil Pandey, Mustufa Haider Abidi, Abdulrahman Al-Ahmari, Noor Zaman Khan, Namrata Gangil - Microstructural characterization and in-process traverse force during friction stir welding of austenitic stainless steel, Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 13 Nov. 2019, https://doi.org/10.1177/0954406219888238, (2019).

DOI: 10.1177/0954406219888238

[5] Seung Hwan C, Yutaka S, Hiroyuki Kokawa, Kazutaka Okamoto, Satoshi Hirano, Masahisa Iganaki, Rapid formation of the sigma phase in 304 stainless steel during friction stir welding, J. Scripta Materialia, 49:1175-1180. (2003).

DOI: 10.1016/j.scriptamat.2003.08.022

[6] Pushp Kumar Baghel, Friction stir welding of stainless steel 304 - a survey, IOSR Journal of mechanical and civil engineering, ISSN 2278-1684, vol. 1, Issue 2, pp.22-23 July-Aug. (2012).

DOI: 10.9790/1684-0122223

[7] A.P. Reynolds, Wei Tang, T. Gnaupel-Herold, H. Prask H., Structure, properties, and residual stress of 304 L stainless steel, friction stir welds. J Scripta Materialia 48:1289-1294 (2003).

DOI: 10.1016/s1359-6462(03)00024-1

[8] H. Kokawa, S. Hirano, Microstructures in friction stir welding of 304 austenitic stainless steel. 56:234-236; (2005).

DOI: 10.1533/wint.2005.3518

[9] Meran C, Kovan V, Alptekin A, Friction Stir Welding of AISI 304 austenitic stainless steel. 38:123-124, (2007).

DOI: 10.1002/mawe.200700214

[10] M. Neshram, a.o., Friction stir welding of austenitic stainless steel by PCBN tools and its joint analyses, Procedia Materials Science 6, 135-139, (2014).

DOI: 10.1016/j.mspro.2014.07.016

[11] R. Steel, S. Packer, Evaluation of Mechanical Properties of 304L and 316L Stainless Steels Friction Stir Welded, Proceedings of the Twenty-first International Offshore and Polar Engineering Conference. IV: 530-533, (2011).

[12] M. P. Neshram a.o., Mechanical properties and microstructural characterization of friction stir welded AISI 316 austenitic stainless steel, Procedia Materials Science 5, 2376-2381, (2014).

DOI: 10.1016/j.mspro.2014.07.482

[13] R. Cojocaru, L. Boţilă, C. Ciucă, Friction stir welding of S235 steel, The 15th ModTech Int. Conf. Modern Technologies, Quality and Innovation New Face of TMCR, 25-27 May 2011, Chișinău, Republic of Moldova, published in Volume I, pp.273-276, ISSN 2069-6736, ModTech Publishing House, ISI indexed (2011).

[14] R. Cojocaru, L. Boţilă, C. Ciucă , Friction stir welding behaviour of S420Mc steel, Welding& Material Testing, No.4/2014, pp.13-17, ISSN 1453-0392, Year XXIII, (2014).

[15] L.N. Boțilă, R. Cojocaru, a.o., National research project PN 09 160104, Program Nucleu (2009-2013)-Development of friction stir welding process for joining of high hardness materials.