DEGASSING EFFECT AND GRAIN REFINEMENT OF Al-Si ALLOY WITH POWER ULTRASOUND

Acta Metall Sin

2008, Vol. 44

Issue (4): 414-418 DOI:

Research Articles

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DEGASSING EFFECT AND GRAIN REFINEMENT OF Al-Si ALLOY WITH POWER ULTRASOUND

;TingJu Li;;;

大连理工大学铸造工程研究中心

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TingJu Li. DEGASSING EFFECT AND GRAIN REFINEMENT OF Al-Si ALLOY WITH POWER ULTRASOUND. Acta Metall Sin, 2008, 44(4): 414-418 .

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Abstract The degassing effect and the grain refinement of Al-Si alloy with power ultrasound were studied. The value of porosity volume of Al-Si alloy decreases obviously when the treated time is 60s. The grains are fine and globular when the solidification of Al-Si alloy was treated by power ultrasound and the grains are fine but not globular at isothermal temperature in the mushy zone with ultrasonic vibrations. The results imply that the expansion and collapse of cavities which results in the formation of nuclei plays the dominant important role in the formation of fine and globular grains.

Key words: power ultrasound Al-Si alloy degassing effect grain refinement

Received: 21 September 2007

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2008/V44/I4/414

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