Mechanical Property of Roll Cast Al-11%Si Alloy

Toshio Haga

doi:10.4028/www.scientific.net/MSF.794-796.461

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HomeMaterials Science ForumMaterials Science Forum Vols. 794-796Mechanical Property of Roll Cast Al-11%Si Alloy

Mechanical Property of Roll Cast Al-11%Si Alloy

Abstract:

Al-11%Si (-0.44%Fe-0.16%Cu-0.14%Mg) was cast into the strip using a vertical type high speed twin roll caster at speed of 60m/min. Cooling rate of the strip was ranging from 2000^OC/s at surface to 1000^OC/s at center of thickness. The eutectic Si was smaller than 2μm. The homogenization, cold rolling down to 1mm, and annealing were carried out before the tension test, 180 degrees bending test and deep drawing test. Tensile stress was 192MPa, 0.2%proof stress was 84MPa, and elongation was 23.8%. Roll cast Al-11%Si had excellent elongation. The specimen was not broken by the 180 degree bending. LDR (Limiting Drawing Ratio) of the deep drawing test was 1.8. The ductility was drastically improved by the high speed twin roll caster. These results show that roll cast Al-11%Si has ability to be used for sheet forming. Moreover, Fe was increased up to 1.0% as the model of recycled alloy. The elongation was 15.9% and LDR was 1.7 in the condition that Fe content was 1.0%. Al-Si-Fe intermetallic became fine by the effect of rapid solidification. As the result, deterioration of the ductility was improved.

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Periodical:

Materials Science Forum (Volumes 794-796)

Pages:

461-466

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.794-796.461

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Online since:

June 2014

Authors:

Toshio Haga*

Keywords:

Continuous Casting, Rapid Solidification, Recycle, Strip Casting, Twin Roll Caster

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References

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