The impact of heat input on the mechanical properties and microstructure of High Strength Low Alloy steel welded joint by GMA welding process

Rizvi, S.; Singh, R.; Gupta, S.

Abstract: The basic aim of this study was to find a relationship between heat input and mechanical properties of high strength low alloy steel (HSLA) welded joints and also elaborate its effect on microstructure. The combined effect of welding current, voltage and speed i.e. Heat Input on mechanical properties of High Strength Low Alloy Steel (ASTM A242 type-II) weldments have been studied in the present work. HSLA steel work pieces were welded by Gas metal arc welding (GMAW) process under varying welding current, arc voltage, and welding speed. Total nine samples were prepared at different heat input level i.e. 1.872 kJ/mm, 1.9333 kJ/mm, 2.0114 kJ/mm, 2.1 kJ/mm, 2.1956 kJ/mm, 2.296 kJ/mm, 2.4 kJ/mm, 2.5067 kJ/mm and 2.6154 kJ/mm It was observed that as heat input increases the ultimate tensile strength and microhardness of weldment decreased while impact strength increased and it was also observed that on increasing the heat input grain size of microstructure tends to coarsening it is only due to decreasing in cooling rate.

How to cite this paper

        APA: Rizvi, S., Singh, R & Gupta, S. (2021). The impact of heat input on the mechanical properties and microstructure of High Strength Low Alloy steel welded joint by GMA welding process. Engineering Solid Mechanics, 9(3), 299-310.
    

        Chicago/Turabian: Rizvi, S., Singh, R & Gupta, S. 2021. "The impact of heat input on the mechanical properties and microstructure of High Strength Low Alloy steel welded joint by GMA welding process." Engineering Solid Mechanics 9, no. 3 (2021): 299-310.
    

        AMA: Rizvi, S., Singh, R & Gupta, S. The impact of heat input on the mechanical properties and microstructure of High Strength Low Alloy steel welded joint by GMA welding process. Engineering Solid Mechanics. 2021;9(3):299-310.
    

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