Influence of alloying elements in low transformation temperature filler alloys on microstructure and mechanical properties

Abstract

This paper aims to maximize the efficiency of low transformation temperature (LTT) filler alloys by changing composition. The changes of phase expansion were investigated using Creq/Nieq ratio as a parameter. And the optimal Ms level showing the maximum reduction of residual stress was obtained. δ-ferrite was observed with increasing Creq/Nieq ratio. The Experimental results show that volume expansion and toughness were reduced by residue of δ-ferrite.