Enhancing Hydrogen Embrittlement Resistance of Lath Martensite by Introducing Nano-Films of Interlath Austenite

TitleEnhancing Hydrogen Embrittlement Resistance of Lath Martensite by Introducing Nano-Films of Interlath Austenite
Publication TypeJournal Article
Year of Publication2015
AuthorsWang, M, Tasan, CC, Koyama, M, Ponge, D, Raabe, D
JournalMetallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
Volume46A
Issue9
Pagination3797 - 3802
Date Published2015/09//
Abstract

Partial reversion of interlath austenite nano-films is investigated as a potential remedy for hydrogen embrittlement susceptibility of martensitic steels. We conducted uniaxial tensile tests on hydrogen-free and pre-charged medium-Mn transformation-induced plasticity-maraging steels with different austenite film thicknesses. Mechanisms of crack propagation and microstructure interaction are quantitatively analyzed using electron channelling contrast imaging and electron backscatter diffraction, revealing a promising strategy to utilize austenite reversion for hydrogen-resistant martensitic steel design.