Hydrogen-assisted decohesion associated with nanosized grain boundary κ-carbides in a high-Mn lightweight steel

• Published in: Acta materialia Vol. 241; p. 118392
• Main Authors: Elkot, Mohamed Naguib, Sun, Binhan, Zhou, Xuyang, Ponge, Dirk, Raabe, Dierk
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2022
• Subjects: Cryogenic temperature; Hydrogen embrittlement; Intergranular failure; Lightweight steel; κ-carbides; Intergranular failure; Lightweight steel; κ-carbides; Cryogenic temperature; Hydrogen embrittlement

While age-hardened austenitic high-Mn and high-Al lightweight steels exhibit excellent strength-ductility combinations, their properties are strongly degraded when mechanically loaded under harsh environments, e.g. with the presence of hydrogen (H). The H embrittlement in this type of materials, esp...