Imperial College London
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ProfessorDavidDye

Faculty of Engineering, Department of Materials

Professor of Metallurgy
 
 
 
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Contact

 

+44 (0)20 7594 6811david.dye

 
 
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Location

 

1.09GoldsmithSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Chang:2019:10.1038/s41467-019-08752-7,
author = {Chang, Y and Lu, W and Guenole, J and Stephenson, LT and Szczpaniak, A and Kontis, P and Ackerman, AK and Dear, FF and Mouton, I and Zhong, X and Zhang, S and Dye, D and Liebscher, CH and Ponge, D and Korte-Kerzel, S and Raabe, D and Gault, B},
doi = {10.1038/s41467-019-08752-7},
journal = {Nature Communications},
pages = {1--10},
title = {Ti and its alloys as examples of cryogenic focused ion beam milling of environmentally-sensitive materials},
url = {http://dx.doi.org/10.1038/s41467-019-08752-7},
volume = {10},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Hydrogen pick-up leading to hydride formation is often observed in commercially pure Ti (CP-Ti) and Ti-based alloys prepared for microscopic observation by conventional methods, such as electro-polishing and room temperature focused ion beam (FIB) milling. Here, we demonstrate that cryogenic FIB milling can effectively prevent undesired hydrogen pick-up. Specimens of CP-Ti and a Ti dual-phase alloy (Ti-6Al-2Sn-4Zr-6Mo, Ti6246, in wt.%) were prepared using a xenon-plasma FIB microscope equipped with a cryogenic stage reaching −135 °C. Transmission electron microscopy (TEM), selected area electron diffraction, and scanning TEM indicated no hydride formation in cryo-milled CP-Ti lamellae. Atom probe tomography further demonstrated that cryo-FIB significantly reduces hydrogen levels within the Ti6246 matrix compared with conventional methods. Supported by molecular dynamics simulations, we show that significantly lowering the thermal activation for H diffusion inhibits undesired environmental hydrogen pick-up during preparation and prevents pre-charged hydrogen from diffusing out of the sample, allowing for hydrogen embrittlement mechanisms of Ti-based alloys to be investigated at the nanoscale.
AU  - Chang,Y
AU  - Lu,W
AU  - Guenole,J
AU  - Stephenson,LT
AU  - Szczpaniak,A
AU  - Kontis,P
AU  - Ackerman,AK
AU  - Dear,FF
AU  - Mouton,I
AU  - Zhong,X
AU  - Zhang,S
AU  - Dye,D
AU  - Liebscher,CH
AU  - Ponge,D
AU  - Korte-Kerzel,S
AU  - Raabe,D
AU  - Gault,B
DO  - 10.1038/s41467-019-08752-7
EP  - 10
PY  - 2019///
SN  - 2041-1723
SP  - 1
TI  - Ti and its alloys as examples of cryogenic focused ion beam milling of environmentally-sensitive materials
T2  - Nature Communications
UR  - http://dx.doi.org/10.1038/s41467-019-08752-7
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000459704600006&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://www.nature.com/articles/s41467-019-08752-7
UR  - http://hdl.handle.net/10044/1/68795
VL  - 10
ER  -
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