AISI 904L Süper Östenitik Paslanmaz Çeliğin Lazer Kaynak Kabiliyetinin Araştırılması

Year 2025, Volume: 14 Issue: 2, 55 - 69, 30.11.2025

Ceyhun Köse

Abstract

Bu çalışmada, lazer kaynak yöntemiyle birleştirilmiş AISI 904L süper östenitik paslanmaz çeliğin mikroyapı ve mekanik özellikleri araştırılmıştır. Elde edilen sonuçlara göre, en düşük ve en yüksek ısı girdisiyle birleştirilen numunelerin kaynak metali mikroyapısının neredeyse tamamen östenit (dendritik+interdendritik) tanelerinden oluştuğu gözlenmiştir. Isıl işlemin etkisiyle tane sınırlarında ve interdendritik bölgede bazı Cr23C6 ve Cr2N çökeltileri ortaya çıkmıştır. Ayrıca, ısı girdisinin artışına bağlı olarak dendritik yapının arttığı belirlenmiştir. En yüksek mekanik özellikler en düşük ısı girdisiyle birleştirilen numunede elde edilmiştir.

Keywords

Lazer kaynak , Süper östenitik paslanmaz çelik , Mikroyapı , Mekanik özellikler , Isıl işlem

Investigation of Laser Weldability of AISI 904L Super Austenitic Stainless Steel

Abstract

In this study, the microstructure and mechanical properties of AISI 904L super austenitic stainless steel welded using laser beam were investigated. The results showed that the weld metal microstructure of samples joined at the lowest and highest heat inputs consisted almost entirely of austenite (dendritic + interdendritic) grains. Some Cr23C6 and Cr2N precipitates appeared at grain boundaries and in the interdendritic region due to heat treatment. It was also determined that the dendritic structure increased with increasing heat input. The highest mechanical properties were obtained in the sample joined at the lowest heat input.

Keywords

Laser welding , Super austenitic stainless steel , Microstructure , Mechanical properties , Heat treatment

References

• ASTM-E8M, 2003. Standard Test Methods of Tension Testing of Metallic Materials [metric], Annual book of ASTM standards, American Society for Testing and Materials, USA, 1-3.
• Balamurugan, K., Mishra, M.K., Sathiya, P., Sait, A.N. 2014. Weldability studies and parameter optimization of AISI 904L super austenitic stainless steel using friction welding, Mater. Res., 17, 908-919.
• Farneze, H.N., Tavares, S.S.M., Pardal, J.M., Londono, A.J.R., Pereira, V.F., Barbosa, C. 2015. Effects of Thermal Aging on Microstructure and Corrosion Resistance of AISI 317L Steel Weld Metal in the FSW Process, Mat. Res. 18, 1-6.
• Guo, Z.,Li, Y., Ma, J., Liang, X., Li, H., Zhang, S., Han, P. 2023. Effect of Ce content on precipitation behavior in S31254 super austenitic stainless steel, J. Alloys Compd. 966, 171254.
• Hao, Y., Liu, W., Li, J., Nie, B., Zhang, W., Liu, Z. 2018. Microstructural bandings evolution behavior and their effects on microstructure and mechanical property of super-austenitic stainless steel, Mater. Sci. Eng. A, 736, 258-268.
• Hao, Y., Li, J., Li, X., Liu, W., Cao, G., Liu, Z. 2020. Influences of cooling rates on solidification and segregation characteristics of Fe-Cr-Ni-Mo-N super austenitic stainless steel, J. Mater. Process. Technol., 275 116326–116335.
• Koutsoukis, T., Redjaïmia, A., Fourlaris, G. 2013a. Phase transformations and mechanical properties in heat treated superaustenitic stainless steels, Mater. Sci. Eng. A, 561, 477-485. Koutsoukis, T., Konstantinidis, K., Papadopoulou, E.G., Kokkonidis, P., Fourlaris, G. 2011b. Comparative study of precipitation effects during aging in superaustenitic and superferritic stainless steels, Mater. Sci. Technol., 27, 943-950.
• Köse, C., Topal, C. 2022a. Effect of Heat Input and Post-Weld Heat Treatment on Surface, Texture, Microstructure, and Mechanical Properties of Dissimilar Laser Beam Welded AISI 2507 Super Duplex to AISI 904L Super Austenitic Stainless Steels, J. Manuf. Process. 73, 861-894.
• Köse, C. 2016b. Weldability of 5754 aluminum alloy using a pulsed Nd:YAG micro scale laser, Mater Test, 58, 963-969.
• Köse, C. 2016c. An investigation of the surface characterization of laser surface remelted and laser beam welded AISI 316L stainless steel. Int J Electrochem Sci, 11, 3542–3554.
• Köse, C. 2022d. Heat treatment and heat input effects on the dissimilar laser beam welded AISI 904L super austenitic stainless steel to AISI 317L austenitic stainless steel: surface, texture, microstructure and mechanical properties, Vacuum, 205, 111440.
• Köse, C., Mutu, H.B., Doğan, F. 2025e. Effect of Post Weld Heat Treatment and Filler Wire on Mechanical Properties and Microstructure of Tungsten Inert Gas Welded AISI 2507 Super Duplex Stainless Steel. J. of Materi Eng and Perform, 34, 22340–22354.
• Köse, C., Kaçar, R., Zorba, A.P., Bağırova, M., Abamor, E.Ş., Allahverdiyev, A.M. 2018f. Interactions Between Fibroblast Cells and Laser Beam Welded AISI 2205 Duplex Stainless Steel. Materials Science, 24, 159-165.
• Kchaou, Y., Haddar, N., Hénaff, G., Pelosin, V., Elleuch, K. 2014. Microstructural, compositional and mechanical investigation of Shielded Metal Arc Welding (SMAW) welded superaustenitic UNS N08028 (Alloy 28) stainless steel, Mater. Des., 63, 278-285.
• Kuscu, H., Becenen, I., Sahin, M. 2008. Evaluation of temperature and properties at interface of AISI 1040 steels joined by friction welding, Assemb. Autom., 28, 308-316.
• Li, H.B., Yang, S.X., Zhang, S.C., Zhang, B.B., Jiang, Z.H., Feng, H. 2017. Microstructure evolution and mechanical properties of friction stir welding super-austenitic stainless steel S32654, Mater Des, 118, 207-217.
• Li, J., Li, H., Liang, Y., Liu, P., Yang, L. 2019. The microstructure and mechanical properties of multi-strand, composite welding-WireWelded joints of high nitrogen austenitic stainless steel, Materials, 12, 29-44.
• Prabakaran, M.P., Kannan, G.R. 2021. Effects of post-weld heat treatment on dissimilar laser welded joints of austenitic stainless steel to low carbon steel, Inter. J. Press. 191, 1-11.
• Rahman, M.S.A., Raheem, N.A.A., El Koussy, M.R. 2014. Effect of heat Input on the microstructure and properties of dissimilar weld joint between incoloy 28 and superaustenitic stainless steel, Acta Metall.Sin.-Engl. Lett., 27, 259-266.
• Ramkumar, K.D., Chandrasekhar, A., Srivastava, A., Preyas, H., Chandra, S., Dev, S. 2016. Effects of filler metals on the segregation, mechanical properties and hot corrosion behaviour of pulsed current gas tungsten arc welded super-austenitic stainless steel, J Manuf Process, 24, 46-61.
• Sathiya, P., Mishra, M.K., Soundararajan, R., Shanmugarajan, B. 2013a. Shielding gas effect on weld characteristics in arc-augmented laser welding process of super austenitic stainless steel, Opt. Laser Technol. 45, 46-55.
• Sathiya, P., Mishra, M.K., Shanmugarajan, B. 2012b. Effect of shielding gases on microstructure and mechanical properties of super austenitic stainless steel by hybrid welding, Mater. Des., 33, 203-212.
• Sathiya, P., AbdulJaleel, M.Y. 2010c. Measurement of the bead profile and microstructural characterization of a CO2 laser welded AISI 904L super austenitic stainless steel, Opt Laser Technol, 42, 960-968.
• Tian, W., Wu, D., Li, T., Lu, S. 2021. Precipitation behavior and mechanical properties of a 16Cr-25Ni superaustenitic stainless steel weld metal during post-weld heat treatment, Acta Metall. Sin., 52.
• Veillette, E. 2017. The Effect of Heat Treatment on Secondary Phase Formation in Dissimilar Metal Welds, Rensselaer Polytechnic Institute, ProQuest Dissertations Publishing.
• Xin, J., Fang, C., Song, Y., Wei, J., Xu, S., Wu, J. 2017. Effect of post weld heat treatment on the microstructure and mechanical properties of ITER-grade 316LN austenitic stainless steel weldments, Cryogenics, 83, 1-7.
• Zambon, A., Ferro, P., Bonollo, F. 2006. Microstructural, compositional and residual stress evaluation of CO2 laser welded superaustenitic AISI 904L stainless steel, Mater. Sci. Eng. A, 424, 117-127.