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{Peng:2022:10.3390/met12020266,
author = {Peng, L and Zeng, G and Wang, D and Xian, J and Ji, S and Zhan, H and Gourlay, CM},
doi = {10.3390/met12020266},
journal = {Metals},
pages = {1--18},
title = {Al-Mn intermetallics in high pressure die cast AZ91 and direct chill cast AZ80},
url = {http://dx.doi.org/10.3390/met12020266},
volume = {12},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Manganese-bearing intermetallic compounds (IMCs) are important for ensuring adequate corrosion performance of magnesium-aluminium alloys and can be deleterious to mechanical performance if they are large and/or form clusters. Here, we explore the formation of Al-Mn IMCs in Mg-9Al-0.7Zn-0.2Mn produced by two industrial casting processes, high-pressure die casting (HPDC) and direct chill (DC) casting. As Al8Mn5 starts forming above the α-Mg liquidus temperature in this alloy, we consider its formation during melt handling as well as during casting and heat treatment. In HPDC, we focus on sludge formation in the holding pot, partial solidification of IMCs in the shot chamber, and Al-Mn IMC solidification in the die cavity. In DC casting, we focus on interactions between Al-Mn IMCs and oxide films in the launder system, Al-Mn IMC solidification in the billet, and the partial transformation of Al8Mn5 into Al11Mn4 during solution heat treatment. The results show that minimising pre-solidification in the shot sleeve of HPDC and controlling pouring and filtration in DC casting are important for ensuring small Al-Mn intermetallic particles in these casting processes.
AU  - Peng,L
AU  - Zeng,G
AU  - Wang,D
AU  - Xian,J
AU  - Ji,S
AU  - Zhan,H
AU  - Gourlay,CM
DO  - 10.3390/met12020266
EP  - 18
PY  - 2022///
SN  - 2075-4701
SP  - 1
TI  - Al-Mn intermetallics in high pressure die cast AZ91 and direct chill cast AZ80
T2  - Metals
UR  - http://dx.doi.org/10.3390/met12020266
UR  - https://www.mdpi.com/2075-4701/12/2/266
UR  - http://hdl.handle.net/10044/1/94130
VL  - 12
ER  -
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