Low Temperature Impact Toughness and Stress Corrosion Resistance in Duplex Stainless Steel Welds

J. Ocean Eng. Technol. 1995;9(1):151-151.

2상 스테인리스강 용접부의 저온충격인성과 내응력 부식성에 관한 연구

김효종,이성근

동아대학교 금속공학과,동아대학교 금속공학과

Keywords: Duplex Stainless Steel, Weld Metal, Heat-Affected Zone, Low Temperature Impact Toughness, Stress Corrosion Resistance

핵심용어: 이상 스테인리스강, 용착금속부, 열영향부, 저온충격인성, 내응력 부식성

Abstract

The characteristics of low temperature impact toughness and stress corrosion resistance at boiling MgCl$_2$ solution of GTA and SMA weld of duplex stainless steels have been investigated. The impact toughness was highest at the GTAW weld metal and lowest at the SMAW weld, which was almost the same as that of the SMAW heat-affected zone. This was attributable to influence of austenite-ferrite phase balance, and the degree and nature of precipitation that occurred during welding. The SCC resistance of the weldments was slightly higher than that of the base metal, whereas no difference in the SCC resistance was found between two different weldments.