Journal ArticleDOI
Influence of natural convection during upward directional solidification: A comparison between in situ X-ray radiography and direct simulation of the grain structure
Guillaume Reinhart,Charles-André Gandin,Nathalie Mangelinck-Noël,Henri Nguyen-Thi,José E. Spinelli,José Baruchel,Bernard Billia +6 more
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TLDR
In this article, a comparison between the in situ and real-time observation of a directional solidification experiment carried out at the European Synchrotron Radiation Facility and a direct simulation of grain structure formation in the sample using a two-dimensional cellular automaton-finite element (CA-FE) model is presented.About:
This article is published in Acta Materialia.The article was published on 2013-08-01. It has received 52 citations till now. The article focuses on the topics: Directional solidification & Natural convection.read more
Citations
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Growth competition between columnar dendritic grains – Cellular automaton versus phase field modeling
TL;DR: In this paper, cellular automata simulations of two-dimensional growth competition among columnar dendritic grains are carried out for a succinonitrile -0.4wt% acetone alloy.
Journal ArticleDOI
Study on diffusion behavior and microstructural evolution of Al/Cu bimetal interface by synchrotron X-ray radiography
Tongmin Wang,Fei Cao,Peng Zhou,Huijun Kang,Zongning Chen,Yanan Fu,Tiqiao Xiao,Wanxia Huang,Qingxi Yuan +8 more
TL;DR: In this paper, the authors used synchrotron X-ray radiography to in situ study the interface diffusion behavior and microstructural evolution during the melting and solidification of Al/Cu bimetal.
Modeling of macrosegregation and solidification grain structures with a coupled cellular automaton - Finite element model
TL;DR: In this paper, an extension of a coupled Cellular Automaton (CA) - Finite Element (FE) model is presented for the prediction of solidification grain structures and macrosegregation.
Journal ArticleDOI
Modeling and characterization of grain structures and defects in solidification
TL;DR: Karma and Tourret as discussed by the authors reviewed the most recent and significant modeling contributions dealing with the scale of solidification from microstructure to grain structure, including porosity and hot tearing.
Journal ArticleDOI
Influence of gravity level on Columnar-to-Equiaxed Transition during directional solidification of Al – 20 wt.% Cu alloys
L. Abou-Khalil,G. Salloum-Abou-Jaoude,Guillaume Reinhart,C. Pickmann,Gerhard Zimmermann,Henri Nguyen-Thi +5 more
TL;DR: In this article, the influence of gravity on fragmentation and dendrite fragments transport was enlightened, and a spectacular transition from a columnar to a fully equiaxed microstructure was revealed when there is a sharp increase of gravity level.
References
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Journal ArticleDOI
Steady state columnar and equiaxed growth of dendrites and eutectic
TL;DR: In this article, an analysis for the growth of equiaxed grains ahead of the columnar front during directional solidification is presented, and the model considers both single-phase and eutectic growth.
Journal ArticleDOI
Columnar to equiaxed grain transition in as solidified alloys
TL;DR: In this article, the columnar to equiaxed transition (CET) in solidified alloys is considered and a review of the current level of understanding of the CET and current modelling capabilities are summarised and assessed.
Journal ArticleDOI
Understanding mechanisms of grain refinement of aluminium alloys by inoculation
TL;DR: For over half a century, grain refinement of aluminium alloys has been achieved by chemical inoculation; current grain refinement practice involves the addition of master alloys before casting, introducing inoculant particles to the melt as mentioned in this paper.
Journal ArticleDOI
Direct observation of stray crystal formation in unidirectional solidification of Sn Bi alloy by X-ray imaging
Hideyuki Yasuda,Itsuo Ohnaka,Koichi Kawasaki,Akira Sugiyama,Tetsutaro Ohmichi,Jun Iwane,K. Umetani +6 more
TL;DR: In this article, a mold with a re-entrant channel was used for unidirectional solidification of Sn-21-mass% Bi alloys and the detachment of the fragmented dendrite arms was observed after the interface broke down and formed the dendrites.
Journal ArticleDOI
Time-resolved x-ray imaging of aluminum alloy solidification processes
Ragnvald H. Mathiesen,Lars Arnberg,Kjell Ramsøskar,Timm Weitkamp,Christoph Rau,Anatoly Snigirev +5 more
TL;DR: In this article, an innovative technique for in-situ monitoring of a specific solidification phenomenon in real metallic systems has been presented, based on phase and amplitude contrast from the sample.
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