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Roughening improves hydrogen embrittlement resistance of Ti-6Al-4V
File(s)
Revised Manuscript.pdf (8.98 MB)
Accepted version
Author(s)
Kim, Jinwoo
Hall, Dylan
Yan, Haoxue
Shi, Yitong
Joseph, Sudha
Type
Journal Article
Abstract
Polished surfaces of Ti-6Al-4V, the most commonly used titanium alloy, were observed to suffer from hydride growth and associated embrittlement during hydrogen charging, whereas rough surfaces suffered no such susceptibility. Direct microscopic analyses of recombined hydrogen bubbles and thermal desorption spectroscopy (TDS) revealed that the surface roughening promotes recombination of atomic hydrogen to molecular hydrogen, in turn, reducing the relative amount of atomic hydrogen uptake. Subsurface time-of-flight secondary-ion mass spectrometry (ToF-SIMS) further revealed that the high defect density underneath the roughened surface impedes hydrogen diffusion into the bulk. These combined effects mean that, unexpectedly, roughening significantly reduces hydrogen uptake into Ti-6Al-4V and enhances its resistance against hydrogen embrittlement – all resulting from a simple surface treatment.
Date Issued
2021-11
Date Acceptance
2021-09-06
Citation
Acta Materialia, 2021, 220, pp.1-12
URI
URL
DOI
ISSN
1359-6454
Publisher
Elsevier BV
Start Page
1
End Page
12
Journal / Book Title
Acta Materialia
Volume
220
Copyright Statement
© 2022 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
License URL
Identifier
http://sciencedirect.com/science/article/pii/S1359645421006844?via%3Dihub
Subjects
Science & Technology
Technology
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Materials Science
Titanium
Hydrogen
Surface
Hydrogen uptake
Hydrogen embrittlement
STRESS-CORROSION CRACKING
PLASTIC-DEFORMATION
EVOLUTION REACTION
SURFACE TEXTURE
WHITE LAYER
DIFFUSION
BEHAVIOR
MICROSTRUCTURE
STRENGTH
ROUGHNESS
Materials
0204 Condensed Matter Physics
0912 Materials Engineering
0913 Mechanical Engineering
Publication Status
Published
Article Number
117304
Date Publish Online
2021-09-09