Effects of Chemical Composition and Welding Process on Fracture Resistance of Type 347 Stainless Steel Weld
The present study is a systematic investigation of the effects of microstructural changes, which have originated from the variations of filler metals and welding processes, on the J-R properties of simulated welds. Two AISI Type 347 weld metals, with different carbon contents, deposited by a GTAW process and two AISI Type 347 weld metals, with different carbon contents, deposited by a SMAW process were used in this study. The J-R tests were conducted at 316oC (600oF). The welds deposited by the GTAW process showed higher fracture resistances when compared to the welds deposited by the SMAW process. The J-R fracture resistance of the Type 347-GTAW processed weld with high carbon content was remarkably low when compared to the weld with low carbon. The J-R fracture resistances were decreased by coarse Nb(C, N) precipitates in the Type 347 weld deposited by the GTAW process. In the case of the SMAW welds, mainly coarse Ti-rich particles which had originated from the shielding of the welding rods deteriorated the fracture resistances.
Yu Zhou, Shan-Tung Tu and Xishan Xie
J. H. Yoon et al., "Effects of Chemical Composition and Welding Process on Fracture Resistance of Type 347 Stainless Steel Weld", Key Engineering Materials, Vols. 353-358, pp. 1970-1973, 2007