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Title: Phase field modelling of dendritic solidification under additive manufacturing conditions
Authors: Tang, Chao
Du, Hejun
Keywords: Engineering::Mechanical engineering
Issue Date: 2022
Source: Tang, C. & Du, H. (2022). Phase field modelling of dendritic solidification under additive manufacturing conditions. JOM Journal of the Minerals, Metals and Materials Society, 74(8), 2996-3009.
Journal: JOM Journal of the Minerals, Metals and Materials Society 
Abstract: Melting and solidification in metal-based additive manufacturing (AM) ultimately determine the crystallographic texture, cellular/columnar dendritic growth, solute segregation, and resultant materials properties. The microstructure of AM-built alloys is closely related to various physics during the printing process. In the present study, a multi-physics model was developed to simulate the evolution of grain and dendritic-scale microstructure during laser AM of a Ni-based alloy. Computational fluid dynamics was used to simulate the melt pool dynamics and temperature distribution for the laser powder bed fusion process. Using Ni-Nb as an analogue to Inconel 625, a phase field model was applied to predict the microstructural features within a two-dimensional solidified melt pool. The predicted results exhibit fair agreement with experimental characteristics in the literature, including melt pool profile, dendrite size, dendrite morphology, and crystallographic texture. The multi-physics model paves the way for computationally predicting the chemistry-process-structure relationship in AM-built alloys, which helps to understand the fundamental physics of AM solidification.
ISSN: 1047-4838
DOI: 10.1007/s11837-022-05310-3
Rights: © 2022 The Minerals, Metals & Materials Society. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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