Imperial College London
Dr Richard Chater

DrRichardChater

Faculty of Engineering, Department of Materials

Instrumentation Research Fellow, Surface Analysis
 
 
 
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Contact

 

+44 (0)20 7594 6740r.chater

 
 
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Location

 

LG62ARoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Kim:2021:10.1016/j.actamat.2021.117304,
author = {Kim, J and Hall, D and Yan, H and Shi, Y and Joseph, S and Fearn, S and Chater, RJ and Dye, D and Tasan, CC},
doi = {10.1016/j.actamat.2021.117304},
journal = {Acta Materialia},
pages = {1--12},
title = {Roughening improves hydrogen embrittlement resistance of Ti-6Al-4V},
url = {http://dx.doi.org/10.1016/j.actamat.2021.117304},
volume = {220},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - 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.
AU  - Kim,J
AU  - Hall,D
AU  - Yan,H
AU  - Shi,Y
AU  - Joseph,S
AU  - Fearn,S
AU  - Chater,RJ
AU  - Dye,D
AU  - Tasan,CC
DO  - 10.1016/j.actamat.2021.117304
EP  - 12
PY  - 2021///
SN  - 1359-6454
SP  - 1
TI  - Roughening improves hydrogen embrittlement resistance of Ti-6Al-4V
T2  - Acta Materialia
UR  - http://dx.doi.org/10.1016/j.actamat.2021.117304
UR  - http://sciencedirect.com/science/article/pii/S1359645421006844?via%3Dihub
UR  - http://hdl.handle.net/10044/1/99899
VL  - 220
ER  -
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