Degassing of molten aluminum A356 alloy using ultrasonic vibration

Xu, Haixuan; Jian, Xiaogang; Meek, T. T.; Han, Qingyou

doi:10.1016/j.matlet.2004.02.055

Cited by 126 publications

(62 citation statements)

References 4 publications

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“…알루미늄 자동차 부품의 경우 주조 공정에 의한 생산비율이 79%로 가장 높은데 [1], 주조 공정에 의한 부품의 생산은 필연적으로 기공(pore)이 존재하는 문제점이 있으며, 이는 기계적 성질 및 내식성에 유해하게 작용하며 주조 공정에서의 유동도(fluidity)를 감소시킨다. 따라서 고품질의 주조 품의 제조를 위해서는 기공의 제거가 매우 중요하다 [2].…”

Section: 서 론unclassified

“…그러나 환경의 보호와 자원의 경제적 사용에 대한 문제점 때문에 위의 탈가스 방법 외에 또 다른 방법의 적용이 필요시 되고 있으며 그 중 초음파 진동에 의한 탈가스는 앞에 언급되었던 문제점들을 해결하면서 용탕의 탈가스 효과는 물론 처리 조건에 따라 용탕의 청정화, 결정립의 미세화도 가능하다 [2,4,5].…”

Section: 서 론unclassified

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Degassing of Molten A328 Aluminum Alloy by Ultrasonic Vibration

Choe¹,

Jang²,

Lim³

et al. 2011

Journal of the Korea Foundry Society

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A328 alloy is an attractive candidate for recycle-friendly aluminum alloy in the recycling of automotive components. In this study, A328 alloy melt was degassed by ultrasonic vibration and the effect of treatment time on the density, fluidity and mechanical properties was investigated. Experimental results reveal that a constant value of density can be reached after less than 180 seconds of ultrasonic treatment time, but the density decreased when the treatment time was 300 seconds. Ti which was dissolved from the horn during ultrasonic treatment reduced the fluidity of melt. After degassing by ultrasonic vibration for 180 seconds, tensile strength increased from 201MPa to 250MPa, and elongation increased from 2.38% to 3.50%, however, further treatment deteriorated the mechanical properties.Key words: Ultrasonic vibration, Degassing, Cavitation, Die-casting, A328 alloy.

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Section: 서 론unclassified

Degassing of Molten A328 Aluminum Alloy by Ultrasonic Vibration

Choe¹,

Jang²,

Lim³

et al. 2011

Journal of the Korea Foundry Society

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“…UST has been extensively used in purifying, degassing, and refinement of metallic melt [12][13][14][15][16], mainly because introducing the ultrasonic energy into a liquid will induce cavitation and acoustic streaming. Ultrasonic cavitation in liquids causes high speed liquid jets of up to about 300 m/s.…”

Section: Introductionmentioning

confidence: 99%

EXPERIMENTAL AND MODELING ANALYSES OF Al- BASED NANOCOMPOSITES MANUFACTURED VIA MOLTEN-METAL AND SOLIDIFICATION PROCESSING ASSISTED BY ULTRASONIC STIRRING TECHNOLOGY

Jia¹,

Zhang²,

Nastac³

2018

ABM Proceedings

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Ultrasonic Stirring Technology (UST) is used in this study to manufacture Al-based nano-composites. Ultrasonic cavitation plays an important role in refining the microstructure, dispersing the nanoparticles and breaking up clusters of nanoparticles. In this paper, 6061/A356 alloys and Al2O3/SiC nanoparticles are used as the matrix alloys and the reinforcements, respectively. The nanoparticles were inserted into the molten alloy and dispersed by ultrasonic cavitation and acoustic streaming. A previously developed multiphase Computational Fluid Dynamics (CFD) model was used to study the cavitation and the nanodispersion phenomena during ultrasonic processing of these alloys. A comparison between the mechanical properties of the as-cast 6061 and 356 alloys and nano-composites has been performed.

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“…Porozite, alüminyum alaşımlarının dökümünde en önemli hatalardan biri olarak kabul edilmektedir ve yapı içerisinde porozitenin yer alması, dökümün mekanik özelliklerini ve korozyon dayanımını olumsuz yönde etkilemektedir. Dökümde porozitenin oluşumu katılaşma sırasında gazın çözeltide çökelmesi ya da hacimsel çekintileri telafi etmek için sıvı metalin taneler arası bölgeleri beslemesindeki yetersizliklerinden kaynaklanmaktadır [9]. Yapı içerisindeki porozitelerin giderilmesi istenilen mekanik özelliklerin (mukavemet, tokluk, %uzama gibi) elde edilmesinde son derece büyük bir öneme sahiptir [10].…”

Section: Gi̇ri̇ş (Introduction)unclassified