Zonular evaluation of Inconel 617/310 SS dissimilar joint by shear punch test

Shear punch test technique is a novel method for zonular evaluation of weldment mechanical behavior. In this study, changes in the mechanical behavior of different zones of an Inconel 617/310 austenitic stainless steel dissimilar joint, including base metal, heat affected and weld metal zones were investigated by shear punch test. ERNiCrCoMo1 (Inconel 617) filler metal was used in order to achieve dissimilar joint through gas tungsten arc welding process. Furthermore, microstructural evaluation was performed using optical and scanning electron microscopies. The results indicated that by increasing the distance from weld centerline, hardness and ultimate strength values were initially decreased and then increased while ductility was constantly decreased. In this regard, the difference in grain sizes and the type of precipitates were considered the effective parameters.

► The weld metal zone exhibited the highest mechanical properties values.
► The mechanical properties values of HAZ were lower than those of BM.
► Ductility was decreased when moving away from the weld centerline.
► Grain growth and the precipitates were accounted for mechanical behavior changes.