Influence of Artificial Aging on Microstructure and Mechanical Properties of Dissimilar Welds between 310 Stainless Steel and INCONEL 657

Abstract

This investigation is carried out to characterize welding of AISI 310 austenitic stainless steel (SS) to INCONEL 657 nickel-chromium superalloy. The welds were produced using four types of filler materials: the nickel-based corresponding to INCONEL 82, INCONEL A, INCONEL 617, and 310 austenitic SS. This article describes the effects of aging treatment on the joints. A comparative evaluation based on microstructural features and estimation of mechanical properties was performed. INCONEL A and INCONEL 82 exhibited the highest thermal stability and mechanical properties, while INCONEL 617 and 310 SS filler materials showed weak mechanical properties and thermal stability. It is therefore concluded that for the joints between INCONEL 657 and 310 SS, INCONEL A and INCONEL 82 filler materials offer the best compromises.