Hydrogen embrittlement of twinning-induced plasticity steels: contribution of segregation to twin boundaries
File(s)
Accepted version
Author(s)
Khanchandani, Heena
Rolli, Rolf
Schneider, Hans-Christian
Kirchlechner, Christoph
Gault, Baptiste
Type
Journal Article
Abstract
Metallic materials, especially steel, underpin transportation technologies. High-manganese twinning induced plasticity (TWIP) austenitic steels exhibit exceptional strength and ductility from twins, low-energy microstructural defects that form during plastic loading. Their high-strength could help light-weighting vehicles, and hence cut carbon emissions. TWIP steels are however very sensitive to hydrogen embrittlement that causes dramatic losses of ductility and toughness leading to catastrophic failure of engineering parts. Here, we examine the atomic-scale chemistry and interaction of hydrogen with twin boundaries in a model TWIP steel by using isotope-labelled atom probe tomography, using tritium to avoid overlap with residual hydrogen. We reveal co-segregation of tritium and, unexpectedly, oxygen to coherent twin boundaries, and discuss their combined role in the embrittlement of these promising steels.
Date Issued
2023-03-01
Date Acceptance
2022-11-17
Citation
Scripta Materialia, 2023, 225, pp.1-5
ISSN
1359-6462
Publisher
Elsevier
Start Page
1
End Page
5
Journal / Book Title
Scripta Materialia
Volume
225
Copyright Statement
Copyright © Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
Identifier
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000902176400004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
Subjects
BEHAVIOR
CHARACTER
DEUTERIUM
GRAIN-BOUNDARY
Materials Science
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
MICROSCOPY
MN
Nanoscience & Nanotechnology
Science & Technology
Science & Technology - Other Topics
STRAIN-RATE
Technology
Publication Status
Published
Article Number
115187
Date Publish Online
2022-11-23