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Characterization of microstructure and mechanical properties of Super Ni 718 alloy and AISI 316L dissimilar weldments

  • P. Prabaharan (a1), K. Devendranath Ramkumar (a1) and N. Arivazhagan (a1)


The present investigation addressed the weldability of Super Ni 718 alloy and AISI 316L using gas tungsten arc (GTA) welding process using three different filler wires, such as ER2594, ERNiCrMo-4 and ERNiCrCoMo-1. Interface microstructures showed the formation of secondary phases at the heat-affected zone (HAZ) of Super Ni 718 alloy and delta ferrite colonies at the HAZ of AISI 316L. It was witnessed from the weld microstructures that the deleterious phases were suppressed or controlled while using these filler wires for joining the bimetals. Tensile results corroborated that the failure occurred at the parent metal of AISI 316L in all the cases. The presence of microvoids and dimples characterized for the ductile mode of fracture in these weldments. Charpy V-notch test results showed that the weldments using ERNiCrMo-4 filler exhibited higher impact energy. A detailed study has been made to investigate the structure–property relationships of these weldments using optical and scanning electron microscopic techniques.


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1.Devendranath Ramkumar, K., Arivazhagan, N., and Narayanan, S.: Effect of filler materials on the performance of gas tungsten arc welded AISI 304 and Monel 400. Mater. Des. 40, 7079 (2012).
2.Alber Sadek, A., Abass, M., Zaghloul, B., Elrefaey, A., and Ushio, M.: Investigation of dissimilar joints between low carbon steel and monel 400. Trans. JWRI 29(1), 2128 (2000).
3.Ferretti, S., Valenzano, G., and Cugno, W.: International space station external active thermal control system lines manufacturing. 57th International Astronautical Congress Proceedings, 2006. (Aerospace Research Central, American Institute of Aeronautics and Astronautics, 2006).
4.Gordine, J.: Some Problems in Welding Inconel 718 (AWS Spring Meeting in San Francisco, California (1971).
5.Mills, W.J.: Effect of heat treatment on the tensile and fracture toughness behavior of alloy 718 weldments. Weld. J. 63(8), 237s245s (1984).
6.Radhakrishna, C.H. and Prasad Rao, K.: The formation and control of Laves phase in superalloy 718 welds. J. Mater. Sci. 32, 19771984 (1997).
7.Naffakh, H., Shamanian, M., and Ashrafizadeh, F.: Dissimilar welding of AISI 310 austenitic stainless steel to nickel-based alloy Inconel 657. J. Mater. Process. Technol. 209, 36283639 (2009).
8.Mortezaie, A. and Shamanian, M.: An assessment of microstructure, mechanical properties and corrosion resistance of dissimilar welds between Inconel 718 and 310S austenitic stainless steel. Int. J. Pressure Vessels Piping 116, 3746 (2014).
9.Sireesha, M., Albert, S.K., Shankar, V., and Sundaresan, S.: Microstructural features of dissimilar welds between 316LN austenitic stainless steel and alloy 800. Mater. Sci. Eng., A A292, 7482 (2000).
10.Lippold, J.C.: An investigation of weld cracking in Alloy 800. Weld. J. 62, 91103 (1983).
11.Dupont, J.N., Lippold, J.C., and Kiser, S.D.: Welding Metallurgy and Weldability of Nickel-base Alloys (John Wiley & Sons Inc, New Jersey (2009).


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Characterization of microstructure and mechanical properties of Super Ni 718 alloy and AISI 316L dissimilar weldments

  • P. Prabaharan (a1), K. Devendranath Ramkumar (a1) and N. Arivazhagan (a1)


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