Microscopic visualization of hydrogen diffusion in UNS S32750 super duplex stainless steel: Roles of crystal structure and grain size

• DOI: 10.1016/j.ijhydene.2024.02.069
• Publication Date: 2024-02-11T09:42:42Z
• Authors: Hiroshi Kakinuma; Saya Ajito; Motomichi Koyama; Eiji Akiyama

The microscopic hydrogen diffusion in UNS S32750 super duplex stainless steel was analyzed using a polyaniline-nickel-based video imaging system. flux the body-centered-cubic ferrite (α) phases larger than face-centered-cubic austenite (γ) phases, causing from α to γ phases. order of as follows: (high) center > near α-γ boundaries (low). grain size also affected distribution. A small phase led large around phase, because effect outflux increased with decreasing distance boundary.