Imperial College London
Alternate

ProfessorFionnDunne

Faculty of Engineering, Department of Materials

Principal Research Fellow
 
 
 
//

Contact

 

+44 (0)20 7594 2884fionn.dunne

 
 
//

Location

 

104Royal School of MinesSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Liu:2021:10.1016/j.actamat.2021.117368,
author = {Liu, Y and El, Chamaa S and Wenman, MR and Davies, CM and Dunne, FPE},
doi = {10.1016/j.actamat.2021.117368},
journal = {Acta Materialia},
pages = {1--16},
title = {Hydrogen concentration and hydrides in Zircaloy-4 during cyclic thermomechanical loading},
url = {http://dx.doi.org/10.1016/j.actamat.2021.117368},
volume = {221},
year = {2021}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Hydride formation in Zircaloy-4 under cyclic thermomechanical loading has been investigated using characterized notched beam samples in four-point beam testing, and microstructurally-representative crystal plasticity modelling of the beam tests which incorporates an atomistically-informed equilibrium-state model for hydrogen concentration. The model provided the locations within the microstructure of high hydrogen content, above that required for saturation, hence predicting the anticipated locations of hydride observations in the experiments. The strain rate sensitivity of this alloy over the temperature range considered led to considerable intragranular slip and corresponding stress redistribution, and cyclic strain ratcheting leading to high hydrostatic stresses and in turn hydrogen concentrations, which explains the locations of experimentally observed hydride formation. The interstitial hydrogen interaction energy as well as the intragranular geometrically necessary dislocation density were shown to be important in controlling the spatial distributions of observed hydrides.
AU  - Liu,Y
AU  - El,Chamaa S
AU  - Wenman,MR
AU  - Davies,CM
AU  - Dunne,FPE
DO  - 10.1016/j.actamat.2021.117368
EP  - 16
PY  - 2021///
SN  - 1359-6454
SP  - 1
TI  - Hydrogen concentration and hydrides in Zircaloy-4 during cyclic thermomechanical loading
T2  - Acta Materialia
UR  - http://dx.doi.org/10.1016/j.actamat.2021.117368
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000715005500002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://www.sciencedirect.com/science/article/pii/S1359645421007473?via%3Dihub
UR  - http://hdl.handle.net/10044/1/93788
VL  - 221
ER  -
Download