Imperial College London
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ProfessorBaptisteGault

Faculty of Engineering, Department of Materials

Professor of Atomic-Scale Characterization
 
 
 
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Contact

 

b.gault

 
 
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Location

 

Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Lei:2020:10.1126/sciadv.aba7802,
author = {Lei, Z and Wu, Y and He, J and Liu, X and Wang, H and Jiang, S and Gu, L and Zhang, Q and Gault, B and Raabe, D and Lu, Z},
doi = {10.1126/sciadv.aba7802},
journal = {Science Advances},
pages = {1--8},
title = {Snoek-type damping performance in strong and ductile high-entropy alloys},
url = {http://dx.doi.org/10.1126/sciadv.aba7802},
volume = {6},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Noise and mechanical vibrations not only cause damage to devices, but also present major public health hazards. High-damping alloys that eliminate noise and mechanical vibrations are therefore required. Yet, low operating temperatures and insufficient strength/ductility ratios in currently available high-damping alloys limit their applicability. Using the concept of high-entropy alloy (HEA), we present a class of high-damping materials. The design is based on refractory HEAs, solid-solutions doped with either 2.0 atomic % oxygen or nitrogen, (Ta0.5Nb0.5HfZrTi)98O2 and (Ta0.5Nb0.5HfZrTi)98N2. Via Snoek relaxation and ordered interstitial complexes mediated strain hardening, the damping capacity of these HEAs is as high as 0.030, and the damping peak reaches up to 800 K. The model HEAs also exhibit a high tensile yield strength of ~1400 MPa combined with a large ductility of ~20%. The high-temperature damping properties, together with superb mechanical properties make these HEAs attractive for applications where noise and vibrations must be reduced.
AU  - Lei,Z
AU  - Wu,Y
AU  - He,J
AU  - Liu,X
AU  - Wang,H
AU  - Jiang,S
AU  - Gu,L
AU  - Zhang,Q
AU  - Gault,B
AU  - Raabe,D
AU  - Lu,Z
DO  - 10.1126/sciadv.aba7802
EP  - 8
PY  - 2020///
SN  - 2375-2548
SP  - 1
TI  - Snoek-type damping performance in strong and ductile high-entropy alloys
T2  - Science Advances
UR  - http://dx.doi.org/10.1126/sciadv.aba7802
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000542299800030&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
UR  - https://www.science.org/doi/10.1126/sciadv.aba7802
UR  - http://hdl.handle.net/10044/1/104337
VL  - 6
ER  -
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