Imperial College London
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ProfessorChristopherGourlay

Faculty of Engineering, Department of Materials

Professor of Physical Metallurgy
 
 
 
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Contact

 

+44 (0)20 7594 8707c.gourlay

 
 
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Location

 

301DBessemer BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Su:2019:10.1016/j.actamat.2018.10.006,
author = {Su, T-C and O'Sullivan, C and Nagira, T and Yasuda, H and Gourlay, C},
doi = {10.1016/j.actamat.2018.10.006},
journal = {Acta Materialia},
pages = {208--225},
title = {Semi-solid deformation of Al-Cu alloys: a quantitative comparison between real-time imaging and coupled LBM-DEM simulations},
url = {http://dx.doi.org/10.1016/j.actamat.2018.10.006},
volume = {163},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Semi-solid alloys are deformed in a wide range of casting processes; an improved understanding and modelling capability is required to minimise defect formation and optimise productivity. Here we combine thin-sample in-situ X-ray radiography of semisolid Al-Cu alloy deformation at 40–70% solid with 2D coupled lattice Boltzmann method - discrete element method (LBM-DEM) simulations. The simulations quantitatively capture the key features of the in-situ experiments, including (i) the local contraction and dilation of the grain assembly during shear deformation; (ii) the heterogeneous strain fields and localisation features; (iii) increases in local liquid pressure in regions where liquid was expelled from the free surface in the experiment; and (iv) decreases in liquid pressure in regions where surface menisci are sucked-in in experiments. The verified DEM simulations provide new insights into the role of initial solid fraction on the stress-deformation response and support the hypothesis that the behaviour of semi-solid alloys can be described using critical state soil mechanics.
AU  - Su,T-C
AU  - O'Sullivan,C
AU  - Nagira,T
AU  - Yasuda,H
AU  - Gourlay,C
DO  - 10.1016/j.actamat.2018.10.006
EP  - 225
PY  - 2019///
SN  - 1359-6454
SP  - 208
TI  - Semi-solid deformation of Al-Cu alloys: a quantitative comparison between real-time imaging and coupled LBM-DEM simulations
T2  - Acta Materialia
UR  - http://dx.doi.org/10.1016/j.actamat.2018.10.006
UR  - https://www.sciencedirect.com/science/article/pii/S135964541830795X
UR  - http://hdl.handle.net/10044/1/65226
VL  - 163
ER  -
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