![]() This paper presents analysis and comparison into mechanical behaviour and microstructural attributes of postweld heat-treated AISI 1020 (0.21%-C) plates joined by the shielded metal arc welding (SMAW) process. From the present experimental analysis, it was found that heat treatment processes significantly changed/improved the desired properties of the AISI 1020 steel samples. The mechanical properties and microstructural attributes obtained in ‘heat treated’ samples were compared with those results of ‘as received’ samples. In addition, the microstructural images, captured by an optical microscope, of all the samples were observed and analysed. After a proper preparation, samples were undergone through various mechanical tests, such as, tension test, shear test, hardness test, and impact test. Hence the final condition of all the four samples is: as received normalised sand cooled water quenched. These three heat treated samples were compared with as received sample. Mainly, three different cooling medium were taken. ![]() The cooling rate of all the samples was different. The steels samples were heated above the lower critical temperature range, i.e. The present work deals with assessment of heat treated AISI 1020, a low carbon steel (0.2%-C), on the basis of various destructive testing and microstructural behaviour.
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