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{Cui:2022:10.1016/j.jallcom.2021.162318,
author = {Cui, Y and Gourlay, C},
doi = {10.1016/j.jallcom.2021.162318},
journal = {Journal of Alloys and Compounds},
pages = {1--14},
title = {Growth twinning and morphology of Al45Cr7 and Al13Fe4},
url = {http://dx.doi.org/10.1016/j.jallcom.2021.162318},
volume = {893},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Twinned crystal growth is studied in primary Al45Cr7 and Al13Fe4 intermetallic compounds (IMCs) to explore how different twin types and twin variants affect the growth morphology during solidification. In both IMCs, the number of twin variants increased as the cooling rate increased and, by ~ 5 K/s, both IMCs formed cyclic twins with combined icosahedral (Al45Cr7) or decagonal (Al13Fe4) pseudosymmetry. The growth morphology depended on which twin variants were present. When all twin domains shared a common direction that was a rod growth direction in single crystals, twinning did not prevent crystals from growing as rods. This was the case for both IMCs at slow cooling rate and Al13Fe4 at all cooling rates. Cyclic twinning of Al13Fe4 generated many re-entrant corners but resulted in only a modest reduction in rod aspect ratio. In contrast, when twin domains in Al45Cr7 had common directions along multiple pseudo-i(2) axes, crystal growth transitioned from rod-like to a near-equiaxed morphology.
AU  - Cui,Y
AU  - Gourlay,C
DO  - 10.1016/j.jallcom.2021.162318
EP  - 14
PY  - 2022///
SN  - 0925-8388
SP  - 1
TI  - Growth twinning and morphology of Al45Cr7 and Al13Fe4
T2  - Journal of Alloys and Compounds
UR  - http://dx.doi.org/10.1016/j.jallcom.2021.162318
UR  - https://www.sciencedirect.com/science/article/abs/pii/S0925838821037282?via%3Dihub
UR  - http://hdl.handle.net/10044/1/93605
VL  - 893
ER  -
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