Grain Refinement Performance of Aluminium Cast-Alloy by Deformed Al-Al3Ti Alloy Refiner

Hisashi Sato; Kentaro Ota; Yoshimi Watanabe; Zuo Gui Zhang; Kaneaki Tsuzaki

doi:10.4028/www.scientific.net/MSF.519-521.1859

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HomeMaterials Science ForumMaterials Science Forum Vols. 519-521Grain Refinement Performance of Aluminium...

Grain Refinement Performance of Aluminium Cast-Alloy by Deformed Al-Al₃Ti Alloy Refiner

Abstract:

Grain refining experiments for casting of pure Al were conducted to evaluate the grain refinement performance of an Al-5mass%Ti alloy refiner before and after cold rolling. Al3Ti particles in the Al-Ti alloy refiner were efficiently fragmented by cold rolling. The size of the Al3Ti particles in cold rolled Al-Ti alloy refiner decreased from 280μm to 30μm with increasing reduction ratio of cold rolling. Mean size of α-Al grains in pure Al cast refined by the cold rolled Al-Ti alloy refiner decreased from about 500μm to 200μm with increasing the reduction ratio. In order to investigate mechanical property of the pure Al cast refined by the cold rolled Al-Ti alloy refiner, Vickers hardness test and tensile test were conducted. Strength of the pure Al cast refined by the cold rolled Al-Ti alloy refiner increased with increasing the reduction ratio. The strength improvement of pure Al cast refined by the cold rolled Al-Ti alloy refiner followed Hall-Petch relationship. From obtained results, it was concluded that cold rolling for refiner is useful practical application for pure Al cast.

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Periodical:

Materials Science Forum (Volumes 519-521)

Pages:

1859-1864

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.519-521.1859

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Online since:

July 2006

Authors:

Hisashi Sato, Kentaro Ota, Yoshimi Watanabe, Zuo Gui Zhang, Kaneaki Tsuzaki

Keywords:

Al₃Ti, Al-Ti, Casting, Cold Rolling, Grain Refinement

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References

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[5] [10] [15] [20] [25] [30] 1. 2 1. 4 1. 6 1. 8 2. 0 2. 2 2. 4 Proof stress of pure Al cast, σ0. 2, [MPa] d -0. 5 Fig. 7 Variation of 0. 2% proof stress, σ0. 2, of pure Al cast refined by Al-Ti alloy refiner as a function of d-0. 5.

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