Three Dimensional Methodology to Characterize Large Dendritic Equiaxed Grains in Industrial Steel Ingots
Laboratory of Excellence on Design of Alloy Metals for low-mAss Structures (DAMAS), Université de Lorraine, 57073 Metz, France
Department of Metallurgy & Materials Science and Engineering, Institut Jean Lamour, 2 allée André Guinier Campus Artem, 54000 Nancy, France
Ascométal CREAS, Avenue de France, BP 70045, 57301 Hagondange, France
Author to whom correspondence should be addressed.
Received: 25 May 2018 / Revised: 11 June 2018 / Accepted: 12 June 2018 / Published: 13 June 2018
The primary phase grain size is a key parameter to understand the formation of the macrosegregation pattern in large steel ingots. Most of the characterization techniques use two-dimensional measurements. In this paper, a characterization method has been developed for equiaxed dendritic grains in industrial steel castings. A total of 383 contours were drawn two-dimensionally on twelve
slices. A three-dimensional reconstruction method is performed to obtain 171 three-dimensional grains. Data regarding the size, shape and orientation of equiaxed grains is presented and thereby shows that equiaxed grains are centimeter-scale complex objects. They appear to be a poly-dispersed collection of non-isotropic objects possessing preferential orientations. In addition, the volumetric grain number density is
, which compares to the
that can be obtained with estimation from 2D measurements. The
value is ten-times smaller than that previously used in the literature to simulate the macrosegregation profile in the same
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Gennesson, M.; Zollinger, J.; Daloz, D.; Rouat, B.; Demurger, J.; Combeau, H. Three Dimensional Methodology to Characterize Large Dendritic Equiaxed Grains in Industrial Steel Ingots. Materials 2018, 11, 1007.
Gennesson M, Zollinger J, Daloz D, Rouat B, Demurger J, Combeau H. Three Dimensional Methodology to Characterize Large Dendritic Equiaxed Grains in Industrial Steel Ingots. Materials. 2018; 11(6):1007.
Gennesson, Marvin; Zollinger, Julien; Daloz, Dominique; Rouat, Bernard; Demurger, Joëlle; Combeau, Hervé. 2018. "Three Dimensional Methodology to Characterize Large Dendritic Equiaxed Grains in Industrial Steel Ingots." Materials 11, no. 6: 1007.
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