Impact of composition and cold work on SCC of high Si-bearing stainless steel simulating radiation-induced segregation under simulated PWR primary water
Year: 2025
Type: article
Abstract: Thick block alloys simulating radiation-induced segregation effects of compositions at grain boundaries were designed and prepared, and deformation due to irradiation hardening was simulated by cold working treatments. The stress corrosion cracking (SCC) behavior of 17Cr-13Ni-3Si, 13Cr-17Ni, and 13Cr-17Ni-3Si alloys in the as-cast and cold-worked states was studied by crack growth rate (CGR) tests using compact tension specimens in hydrogenated high-temperature water. The fracture surfaces of the three as-cast state simulated alloys showed local SCC indications, while the fracture surfaces of all cold-worked state simulated alloys showed typical intergranular SCC characteristics. In the absence of cold work, the single Si addition has no noticeable effect on SCC propagation. Stress-accelerated grain boundary oxidation acts as the initiation site for intergranular cracks. Cold-worked low Cr alloy with high Si content significantly promotes SCC growth in hydrogenated water. The effect of alloy composition and strain hardening on SCC and its implications for irradiation-assisted SCC were discussed.
Source: Journal of Nuclear Materials
Authors: Caibo Xie, Deng Pan, Hao Liu, Zhanpeng Lu, Tongming Cui, Junjie Chen, Xinhe Xu
Language: English
Subfield: Metals and Alloys
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $2,640
OpenAlex ID: W4408762949