AN EVALUATION OF THERMAL STABILITY IN DISSIMILAR WELDS BETWEEN ۳۱۰ STAINLESS STEEL AND ALLOY ۶۵۷

Abstract: The investigation is carried out to characterize welding of AISI ۳۱۰ austenitic stainless steel to Inconel ۶۵۷ nickel-chromium superalloy. The welds were produced using four types of filler materials: the nickel-based corresponding to Inconel ۸۲, Inconel A, Inconel ۶۱۷ and austenitic stainless steel ۳۱۰. This paper describes the effects of aging treatment on the joint. The comparative evaluation was based on microstructural features and estimation of mechanical properties. While Inconel A exhibited highest thermal stability and mechanical properties (hardness and ultimate strength), Inconel ۸۲ weld metal also showed good thermal stability and mechanical properties. On the other hand, welds produced with Inconel ۶۱۷ and ۳۱۰ SS filler materials showed weak thermal stability and failed in the weld metals. It is therefore concluded that for the joint between Inconel ۶۵۷ and ۳۱۰ stainless steel, Inconel A and Inconel ۸۲ filler materials offered the best compromises, respectively.

کلیدواژه ها:

AISI ۳۱۰ ، Inconel ۶۵۷ ، Dissimilar Welding ، Aging ، Thermal Stability ، Mechanical