LAUSR

The mechanical and fracture behaviors of electron-beam welded (EBW) joints between Cr-Mo steel (CS) and austenitic stainless steel type AISI 304 (SS) were investigated. A double notch was created at the middle of the weld area with three different notch depth (D) to weld metal width (2W) ratios, D/W = 0.33, 0.42, and 0.5, to study the strength of weld metal compared to that of CS. The weld metal and heat-affected zones (HAZs) were found to be free of defects. The interface region show that Cr23C6 was formed on the stainless steel side, while a martensitic structure was formed on the Cr-Mo steel side. The hardness of the weld metal was higher than that of the rest of the weld metal and the HAZs. Furthermore, the stress concentration (D/W = 0.33) was insufficient to initiate the crack at the notch root, i.e., the strength of CS was lower than that of weld metal with this defect.The mechanical and fracture behaviors of electron-beam welded (EBW) joints between Cr-Mo steel (CS) and austenitic stainless steel type AISI 304 (SS) were investigated. A double notch was created at the middle of the weld area with three different notch depth (D) to weld metal width (2W) ratios, D/W = 0.33, 0.42, and 0.5, to study the strength of weld metal compared to that of CS. The weld metal and heat-affected zones (HAZs) were found to be free of defects. The interface region show that Cr23C6 was formed on the stainless steel side, while a martensitic structure was formed on the Cr-Mo steel side. The hardness of the weld metal was higher than that of the rest of the weld metal and the HAZs. Furthermore, the stress concentration (D/W = 0.33) was insufficient to initiate the crack at the notch root, i.e., the strength of CS was lower than that of weld metal with this defect.