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{Wang:2024:10.1016/j.scriptamat.2023.115886,
author = {Wang, D and Peng, L and Gourlay, CM},
doi = {10.1016/j.scriptamat.2023.115886},
journal = {Scripta Materialia},
title = {Al-Mn-based decagonal quasicrystal in AZ magnesium alloys and its nucleation on Al8Mn5 during solidification},
url = {http://dx.doi.org/10.1016/j.scriptamat.2023.115886},
volume = {241},
year = {2024}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Manganese is added to many magnesium alloys to control impurity iron, but its effects on phase transformations and microstructure formation remain incompletely understood. Here we show that an Al-Mn-based decagonal quasicrystal (d-QC) forms in the late stages of solidification in AZ31 and AZ91 magnesium alloys at relatively slow cooling rates, here down to 0.1 K/s. The d-QC has a periodicity of ∼ 12 Å, grew as decagonal rods and commonly shared interfaces with Al8Mn5 and eutectic Mg17Al12. A reproducible orientation relationship (OR) was measured with Al8Mn5 only, indicating that the d-QC nucleated on Al8Mn5. The OR is consistent with the structural relationship between quasicrystals and gamma brasses and gives the d-QC nucleation advantages over LT-Al11Mn4 during solidification. A subsequent heat treatment at 410 °C caused both Al8Mn5 and the d-QC to transform into LT-Al11Mn4.
AU  - Wang,D
AU  - Peng,L
AU  - Gourlay,CM
DO  - 10.1016/j.scriptamat.2023.115886
PY  - 2024///
SN  - 1359-6462
TI  - Al-Mn-based decagonal quasicrystal in AZ magnesium alloys and its nucleation on Al8Mn5 during solidification
T2  - Scripta Materialia
UR  - http://dx.doi.org/10.1016/j.scriptamat.2023.115886
UR  - http://hdl.handle.net/10044/1/108309
VL  - 241
ER  -
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