| Issue |
Metall. Res. Technol.
Volume 117, Number 6, 2020
|
|
|---|---|---|
| Article Number | 621 | |
| Number of page(s) | 7 | |
| DOI | https://doi.org/10.1051/metal/2020069 | |
| Published online | 09 November 2020 | |
Regular Article
Enhancement of microstructure uniformity and grain refining efficiency of Al-5Ti-1B alloy via powder extrusion
Guangdong Institute of Materials and Processing,
Guangzhou,
510650, PR China
* e-mail: hlhuang@gimp.gd.cn
Received:
26
August
2019
Accepted:
18
September
2020
Microstructure uniformity and grain refining efficiency of Al-5Ti-1B alloy rod prepared by powder extruded process and continuous casting and rolling process are investigated in detail by X ray diffractometer, scanning electron microscope and electron probe. It is found that TiB2 and TiAl3 particles are uniformly distributed in the powder extruded Al-5Ti-1B alloy via gas atomization and hot extrusion process. The samples with 0.2% powder extruded Al-5Ti-1B alloy rod holding for 2 min consist of equiaxed grains with an average diameter of 183 µm. Even the holding time extended to 180 min, the average diameter is still stable (229 µm). Al-5Ti-1B alloy rod prepared by the powder extruded process presents better grain refinement and stronger resistance to grain coarsening.
Key words: Al-5Ti-B alloy rod / grain refining efficiency / gas atomization / powder extrusion / rapid solidification
© EDP Sciences, 2020
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