Effects of surface treatments on environmentally-assisted cracking susceptibility of Alloy 182 in BWR environment

Comparison of the effect of water jet cavitation peening on stress corrosion cracking behavior of nickel-based alloy 600 and alloy 182 in high temperature water

“…Surface state and dislocation: Plastic deformation induced an increase in surface roughness and hardness and dislocation structure was obtained after the WJP treatment (Figures 3 and 7). They may promote the corrosion of the alloys and deteriorate the SCC resistance (Que et al , 2021). No negative effects of surface state change and dislocation on SCC behavior in 600MA and alloy 182 can be observed.…”

Investigation of surface treatment effects on the environmentally-assisted cracking behaviour of Alloy 182 in boiling water reactor environment

“…SAM is a cryogenic machining process with face milling and it is a surface finish option for future nuclear industry when machining new components that will be exposed to high-temperature water environments in service condition. More details of these three surface finishes are available in [10]. SP surface treatment was applied by peening on a rough ground (SiC P80 paper) surface with ceramic balls of 0.6 mm in diameter and coverage ratio of 125%.…”

“…Reliable prediction of the EAC initiation behaviour of Alloy 182 with different surface treatments is therefore considered to be very important for the safe long-term operation of existing nuclear power plants, as well as for the development of promising mitigation solutions to inhibit EAC. Although numerous studies have been conducted to study the EAC initiation of Ni-based alloys [10][11][12][13][14], to date there are no sufficiently qualified and quantitative data available on the effect of surface machining on the initiation of EAC for Alloy 182, and it is not clear which surface condition can inhibit EAC initiation of Alloy 182 most effectively under light water reactor environments.…”

Effects of surface treatments and temperature on the oxidation behavior of 308L stainless steel cladding in hydrogenated high-temperature water

“…Austenitic stainless steel (ASS) welds are widely applied as critical components in many industries attributed to the weld metals containing austenite and ferrite phases, and the wellcontrol duplex structure is generally considered to be against corrosion and mitigate stress corrosion cracking (SCC) [1][2][3][4][5]. The main parameters that influence oxidation and SCC performance of austenitic alloy were identified as material and water chemistry [6][7][8], the type of loading [6,7,9], experiment temperature [9][10][11][12], and surface state [13][14][15][16]. Surface grinding or machining can lead to a severe cold-worked subsurface with considerable strain, dislocations density and deformed layer, which is usually the last stage for the fabrication of the weld joints [17].…”

“…However, few available data have reported the effect of the surface treatment on the corrosion and SCC behavior of the weld metals in high-temperature water [15,17]. Due to the special microstructure and difference lattice diffusion coefficient between the ferrite and austenite phases of the weld metal, its oxidation behavior would be different from the single austenitic alloy.…”