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Optimizing Fusion Zone Grain Size, Hardness and Tensile Strength of Pulsed Current Micro Plasma Arc Welded AISI 304 and AISI 430 dissimilar Alloy using Grey Relational Analysis

Mr. G. Uma Maheswara Rao, Dr. Ch.Srinivasa Rao


In the present work, two dissimilar AISI 304 and AISI 430 sheets of 0.4mm thick is butt welded using Micro Plasma Arc Welding. Welding input parameters like peak current, base current, pulse rate and pulse width are considered and output responses like fusion zone grain size, hardness and ultimate tensile strength of the welded joint are considered. 31 experiments are performed as per Central Composite Design (CCD) design matrix of Response Surface Method (RSM) by considering four factors and five levels of weld input parameters. Grey Relational Analysis (GRA) is carried out by minimizing fusion zone grain size and maximizing fusion zone hardness and ultimate tensile strength to find the optimal combination of weld input parameters. The order of importance of weld input parameters are also identified and improvement in Grey Relational Grade was found.

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S. Missori and C. Koerber: Weld. J. 76 (1997) 125s.

M. Sireesha, V. Shankar, S. K. Albert and S. Sundaresan: Mater. Sci. Eng., A 292 (2000) 74–82.

Ramesh Kumar S, Akhilendar Kumar Singh, Sandeep S, Aravind P ,Investigation on Microstructural behavior and Mechanical Properties of plasma arc welded dissimilar butt joint of austenitic- ferritic stainless steels , Materials Today: Proceedings 5 ,2018,pp. 8008–8015.

G. Madhusudan Reddy & K. Srinivasa Rao Microstructure and mechanical properties of similar and dissimilar stainless steel electron beam and friction welds, 45, 2009, pp.875-888.

Lokesh Kumar G, Karthikeyan.P, Narasimma Raj.C, Prasanna.B, George Oliver, Microstructure And Mechanical Properties Of ASS (304)-FSS (430) Dissimilar Joints In SMAW & GTAW process,2015,pp.367-378.

M.M.A. Khana, L. Romoli a, M. Fiaschi b, G. Dini a, F. Sarri, Laser beam welding of dissimilar stainless steels in a fillet joint configuration ,Journal of Materials Processing Technology 212,2012,pp.856–867.

Saeid Ghorbania, Reza Ghasemib,c, Reza Ebrahimi-Kahrizsangia, Akbar Hojjati-Najafabadid, Effect of post weld heat treatment (PWHT) on the microstructure, mechanical properties, and corrosion resistance of dissimilar stainless steels, Materials Science & Engineering A, 688 ,2017,pp. 470– 479.

R. Ghasemi, B. Beidokhti, M. Fazel-Najafabadi, Effect Of Delta Ferrite On The Mechanical Properties Of Dissimilar Ferritic-Austenitic Stainless Steel Welds, Arch. Metall. Mater.,63 ,2018, pp.437-443.

A.Arun Mani, T. Senthil Kumar, M. Chandrasekar,Mechanical and Metallurgical properties of dissimilar welded components (AISI 430 ferritic – AISI 304 austenitic stainless steels) by CO2 laser beam welding (LBW), Journal of Chemical and Pharmaceutical Sciences, Special Issue .6, 2015,pp.35-338.

Sarah S Farhood, Jassim M Almurshdy, Ahmed O Al-Roubaiy ,Welding Of AISI 304 To AISI 430 Stainless Steel By Pulsed Nd-YAG Laser, Journal of Scientific And Engineering Research, 3(1), 2016, pp.44-50.


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