Open AccessMicrostructural Analysis of Inconel 625 Nickel Alloy / UNS S31803 Duplex Stainless-Steel Dissimilar Weldments
Author(s) -
Tuba Karahan,
Tolga Mert,
Mustafa Tümer,
Zaim Mithat Kerimak
Publication year - 2019
Publication title -
advanced technologies and materials
Language(s) - English
Resource type - Journals
eISSN - 2620-147X
pISSN - 2620-0325
DOI - 10.24867/atm-2019-1-003
Subject(s) - materials science , metallurgy , welding , alloy , austenite , inconel 625 , filler metal , nickel , inconel , toughness , base metal , optical microscope , microstructure , scanning electron microscope , composite material , arc welding
In this study, Inconel 625 nickel alloy and UNS 31803 duplex stainless steel (DSS) dissimilar pairs were welded with MIG welding process. Weld metal, obtained with ERNiCrMo-3 filler wire, was subjected to mechanical and microstructural investigations. Notch impact test and micro hardness measurements were realized on weld metal in order to evaluate31803 mechanical properties. Microstructural changes in fusion line of the base metals were examined using optical and electron microscopes. Phase precipitations rich of Ti and Mo elements were detected among dendritic austenite arms in the weld metal. It was observed that ERNiCrMo-3 filler metal had sufficient toughness because of high nickel content.