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Wilfried Kurz (EPFL, Lausanne, Switzerland)18/06/2019, 08:50Oral PresentationThe aim of this talk is to present the evolution of the important concepts that led to the modelling of solidification, before the landmark paper by Tiller, Jackson, Rutter and Chalmers in 1953 on constitutional supercooling, and how they influenced our present-day models. Before the relevant research on solidification could start it required the development of essential basic concepts....Go to contribution page
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Yasushi Shibuta (The University of Tokyo)18/06/2019, 09:25Oral PresentationThanks to the recent advance in high-performance computing, the range of application of atomistic simulation is rapidly expanding. We have performed large-scale molecular dynamics (MD) simulations of solidification process including nucleation from undercooled melt and grain growth in the system [1], and discussed heterogeneity in homogeneous nucleation [1] and decrease of the grain boundary...Go to contribution page
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Nathalie Mangelinck-Noël (IM2NP CNRS UMR 7334)19/06/2019, 08:15Oral PresentationAll growth and casting processes, used for example in the superalloy and photovoltaic industrial sectors, face challenges linked to the grain structure and crystalline defects left during the solidification step when aiming at improving the final desired properties. The post-mortem studies of the solidified ingots provide limited information on the mechanisms occurring during solidification,...Go to contribution page
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Alain Karma (Northeastern University, Boston Massachusetts)19/06/2019, 08:50Oral PresentationThis talk will review recent progress to bridge the gap between phase-field modeling on the microstructure scale and grain structure modeling. While phase-field modeling has been used successfully to model quantitatively dendritic alloy microstructures, only volumes up to about a millimeter cube (or even smaller for concentrated alloys) can be simulated even on today’s massively parallel...Go to contribution page
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Ulrike Hecht (Access e.V.)19/06/2019, 09:25Oral PresentationDirectional solidification of eutectics has been extensively studied in systems which display regular coupled growth with the solid-liquid interfaces being non-faceted. The solid-solid phase boundaries however may be locked or loosely attached to planes with a low energy configuration being associated with a characteristic crystallographic orientation relationship (OR). The phase boundary...Go to contribution page
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Carolin Körner (FAU, Friedrich-Alexander Univeristät Erlangen-Nürnberg)20/06/2019, 08:15Oral PresentationAdditive manufacturing (AM) is inducing some kind of next industrial revolution. Components develop layer by layer in a powder bed by selective beam melting according to 3D model data. This technique allows manufacturing of highly complex components and is especially interesting for high performance materials that are difficult to process in conventional technologies. Nevertheless, AM is...Go to contribution page
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Andreas Ludwig (Montanuniversität Leoben)20/06/2019, 08:50Oral PresentationA casting process usually starts with a liquid alloy that solidifies on cooling. Forced and/or natural convection in the melt as well as stresses and deformations that occur from uneven cooling of the just solidified part can be described quite accurately. The challenging range is when the amount of solid increases so that melt flow becomes more and more difficult while solid starts to build...Go to contribution page
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Dianzhong Li (Institute of Metal Research,Chinese Academy of Sciences)20/06/2019, 09:25Oral PresentationChemical inhomogeneity and inclusions are the most severe defect types in bearing steel which have great influences on the ingot quality and final product properties. Based on a series of full-dissections of steel ingots varying with composition and weight, numerous experimental characterizations by SEM, EPMA, TEM, ASPEX and 3D Micro-CT techniques and multi-scale simulations, a new driving...Go to contribution page
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Sylvain Deville (CNRS)21/06/2019, 08:15Oral PresentationThe ice-templating of porous materials has received a great deal of attention during the past few years. This simple process, where a material suspension is simply frozen and then sublimated, provides materials with unique porous architectures, where the porosity is almost a direct replica of the frozen solvent crystals. The basic principle of ice-templating is the assembly of a second phase,...Go to contribution page
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Markus Rettenmayr (Otto-Schott-Institut für Materialforschung Jena)21/06/2019, 08:50Oral PresentationFor the simulation of phase transformations and thermal problems in general, a set of input data is required that for the majority of alloys is unavailable with sufficient accuracy. ”Remedies” are to use data of the pure major alloying element, or use constant values that were measured at room temperature, neglecting their temperature dependence. The effort to gain temperature dependent data...Go to contribution page
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Peter Voorhees (Northwestern University)21/06/2019, 09:25Oral PresentationWith the advent of high-energy X-ray sources, it is now possible to follow solidification processes in three dimensions and as a function of time. The ability to observe and quantify the solidification process in metals on sub-second time scales and micron spatial scales in three dimensions provide fundamentally new insights into this complex phase transformation. Only through...Go to contribution page
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