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

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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.

Info:

Periodical:

Materials Science Forum (Volumes 519-521)

Edited by:

W.J. Poole, M.A. Wells and D.J. Lloyd

Pages:

1859-1864

DOI:

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

Citation:

H. Sato et al., "Grain Refinement Performance of Aluminium Cast-Alloy by Deformed Al-Al3Ti Alloy Refiner", Materials Science Forum, Vols. 519-521, pp. 1859-1864, 2006

Online since:

July 2006

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$35.00

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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.

[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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