Morphological and crystallographic characterization of solidified Al-3Ti-1B master alloy under a high magnetic field

Al-3Ti-1B master alloy solidified under a high magnetic field was morphologically and crystallographically characterized. The results showed that sedimentary deposit layers consisting of alpha - alpha l grains, Al3Ti and TiB2 compounds form in the lower parts of the specimens whether or not the magn...

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Veröffentlicht in:Materials characterization 2014-09, Vol.95, p.1-11
Hauptverfasser: Li, Lei, Zhu, Qingfeng, Zhang, Hui, Zuo, Yubo, Ban, Chunyan, He, Lizi, Liu, Haitao, Cui, Jianzhong
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container_start_page 1
container_title Materials characterization
container_volume 95
creator Li, Lei
Zhu, Qingfeng
Zhang, Hui
Zuo, Yubo
Ban, Chunyan
He, Lizi
Liu, Haitao
Cui, Jianzhong
description Al-3Ti-1B master alloy solidified under a high magnetic field was morphologically and crystallographically characterized. The results showed that sedimentary deposit layers consisting of alpha - alpha l grains, Al3Ti and TiB2 compounds form in the lower parts of the specimens whether or not the magnetic field is applied. However, the layer thicknesses and alpha -Al grain sizes are increased with the increase of the magnetic flux densities. Furthermore, the Al3Ti compound reveals small tabular, long bar-like and dendritic forms whether or not the magnetic field is applied. The tabular crystals are bound by large {001} and lateral {101} planes. The long bars show two preferential growth directions of and , whereas the dendritic crystal has only one of . In addition, when the magnetic field is applied, both the long bars and the tabular crystals show a regular alignment, as well as a preferential orientation.
doi_str_mv 10.1016/j.matchar.2014.05.022
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subjects Aluminum base alloys
Bars
Cross-disciplinary physics: materials science
rheology
Crystallography
Density
Exact sciences and technology
Intermetallic compounds
Intermetallics
Magnetic fields
Master alloys
Materials science
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Solidification
Titanium aluminides
title Morphological and crystallographic characterization of solidified Al-3Ti-1B master alloy under a high magnetic field
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