Effect of Interstitial Elements on the Toughness of Ferritic Stainless Steel Weld
In this study, the toughness of 11Cr ferritic stainless steel weld was evaluated by DBTT (Ductile-Brittle-Transition-Temperature) with the interstitial elements level. DBTT of the weld increased with increasing interstitial level due to the formation of martensite phase and solidsolution strengthening. Interstitial elements level should be limited by the adoption of back shielding gas during welding process because increased C+N level detrimentally affects the toughness of ferritic stainless weld. Adoption of Ar as back shielding gas lowered N content in the weld.
Changhee Lee, Jong-Bong Lee, Dong-Hwan Park and Suck-Joo Na
W. B. Lee et al., "Effect of Interstitial Elements on the Toughness of Ferritic Stainless Steel Weld", Materials Science Forum, Vols. 580-582, pp. 45-48, 2008