Stereological Analysis of Nonspherical Particles in Solid Metal

et al. 2016

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Section: Methodsmentioning

confidence: 99%

Section: Three-dimensional Observation Of Nonmetallic Inclusion Clustmentioning

confidence: 99%

Three-dimensional Observation of Nonmetallic Inclusion Clusters in Solid Metal by X-ray Micro-CT

et al. 2016

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“…The present authors' group 16,17) analyzed the 3D structure TiB2 clusters formed in turbulent flow of molten Al using X-ray Micro-CT, which is a non-destructive, 3D characterization method. [18][19][20][21] A model was established by the present authors' group 17) to distinguish 2D clusters on the cross-sectional images, which was validated using the 3D information of clusters obtained by X-ray micro-CT. In this study, the particle coagulation experiments were carried out using SiC particles in molten Al.…”

Section: Introductionmentioning

confidence: 99%

Particle Coagulation in Molten Metal Based on Three-Dimensional Analysis of Cluster by X-Ray Micro-Computer Tomography (CT)

et al. 2013

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Particle coagulation plays a key role in steel refining process to remove inclusions. Many research works focus on the behaviors of particle coagulation. To reveal its mechanism water model experiments have been performed by some researchers including the authors' group. In this paper, experiments of particle coagulation were carried out with molten Al including SiC particles in a mechanically agitated crucible with two baffles. Particle coagulation and formation of clusters were observed on the microscopy images of as-polished samples. Three-dimensional (3D) analysis of the clusters in solidified Al was implemented by X-ray micro CT available at SPring-8. The methods to distinguish clusters on two-dimensional (2D) cross-sectional images were discussed, which were established in the previous works by the present authors' group. The characteristics of the 3D SiC clusters and their 2D cross-sections were analyzed. The statistical ranges of the parameters for 2D clusters were used as criterions to distinguish the clusters on 2D microscopy images from the as-polished samples. The kinetics of SiC particle coagulation was studied by the measured cluster number density and size using our program to distinguish cluster in 2D crosssectional images according to 3D information (DC-2D-3D). The calculated and experimental results of the SiC particle coagulation in molten Al agree well with each other.

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“…However, it is very difficult to find the experimental reports about 3D cluster structure analysis, especially the non-metallic particle clusters in metal system because of its opaqueness and high melting point. Recently, some 3D analyses of the pore and non-metallic particles in metal were made by X-ray micro-computed tomography (micro-CT), [20][21][22][23][24][25][26][27][28] which is well known as nondestructive inspection method. In this study, TiB2 particle clusters were prepared in a mechanically agitated crucible containing molten Al and TiB2 particles.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 3 shows the experimental apparatus to prepare TiB2 clusters in molten Al. TiB2 particles included in semisolid slurry 28) of Al-7wt.%Si alloy (878 K) were mixed into molten aluminum at 1 123 K in a crucible (31%Al2O3-69%SiO2). An alumina-coated two-paddle impeller was introduced to agitate and generate turbulent flow in the crucible with two baffle plates.…”

Section: Introductionmentioning

confidence: 99%

Morphology of Nonmetallic-inclusion Clusters Observed in Molten Metal by X-ray Micro-Computed Tomography (CT)

et al. 2013

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