Properties of electron beam welded SAF 2205 duplex stainless steel

Characterization of duplex stainless steel weld metals obtained by hybrid plasma-gas metal arc welding

“…However, these welding techniques are applicable to joints that have very narrow gap or no gap, therefore it is not possible to introduce proper amount of filler metal, which has excess Ni, to the weld metal to obtain enough γ in δ matrix. Beside their very low heat inputs [8,9], autogenous or partly-autogenous keyhole welding may lead to an excess δ-ferrite forming in aswelded DSS that leads to deterioration of the toughness and the corrosion properties of the material [10,11]. Therefore, PAW, LBW, HLAW and EBW of DSS normally requires post-weld treatments, like solutionizing, in order to obtain a weld metal microstructure which has a proper phase balance and is free from secondary phases [12].…”

Effect of Laser Beam Welding Parameters on Microstructure and Properties of Duplex Stainless Steel

“…Previous investigations have demonstrated that microstructure of both weld and heat affected zones is a function of the cooling rate from peak temperature [12][13][14][15]. Consequently, it is expected that the ferrite/austenite balance in fusion zone is affected by laser power and welding speed.…”

Influence of heat input and solubilizing heat treatment on the impact properties of SAW joints in SAF 2205 duplex steel

“…It is important to remember that for the last HI a partial penetration and misalignments have been found in the weld zone due; the fracture preferentially follows defects inside the material. Moreover, a direct correlation between the total absorbed energy and the amount of the austenitic phase has been found; the higher the percentage of austenite, the higher is the impact strength energy [10].…”