TY - JOUR
T1 - Solute trapping in rapid solidification
AU - Pinomaa, Tatu
AU - Laukkanen, Anssi
AU - Provatas, Nikolas
N1 - Funding Information:
T.P. and A.L. wish to acknowledge the support of the Academy of Finland through the HEADFORE project, Grant No. 333226. N.P. wishes to acknowledge the National Sciences and Engineering Research Council of Canada, the Canada Research Chairs Program for funding, and Compute Canada for computing resources.
Publisher Copyright:
© The Author(s), 2020, published on behalf of Materials Research Society by Cambridge University Press.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/11/1
Y1 - 2020/11/1
N2 - Rapid solidification gives rise to solute trapping, which decreases solute partitioning and alters equilibrium solidification velocity-undercooling relationships. These effects influence microsegregation, solidification morphology, and the emergent microstructure length scales. Here, we review solute trapping and solute drag in rapid solidification in terms of theory, simulation methods, and experimental techniques. The basic theory to describe solute trapping is contained in the continuous growth model. This model breaks down at high solidification velocities, where solidification transitions abruptly to complete trapping, a limit that can be captured with the local nonequilibrium model. Solute trapping theories contain unknown parameters. Their determination from atomistic simulations or pulsed laser melting experiments is discussed. Microstructural evolution in rapid solidification can be readily investigated with the phase-field method, various alternatives of which are presented here. Uncertainties related to kinetic parameters and heat transfer during rapid solidification can be studied by comparing phase-field simulations to dynamic transmission electron microscopy observations.
AB - Rapid solidification gives rise to solute trapping, which decreases solute partitioning and alters equilibrium solidification velocity-undercooling relationships. These effects influence microsegregation, solidification morphology, and the emergent microstructure length scales. Here, we review solute trapping and solute drag in rapid solidification in terms of theory, simulation methods, and experimental techniques. The basic theory to describe solute trapping is contained in the continuous growth model. This model breaks down at high solidification velocities, where solidification transitions abruptly to complete trapping, a limit that can be captured with the local nonequilibrium model. Solute trapping theories contain unknown parameters. Their determination from atomistic simulations or pulsed laser melting experiments is discussed. Microstructural evolution in rapid solidification can be readily investigated with the phase-field method, various alternatives of which are presented here. Uncertainties related to kinetic parameters and heat transfer during rapid solidification can be studied by comparing phase-field simulations to dynamic transmission electron microscopy observations.
UR - http://www.scopus.com/inward/record.url?scp=85095975414&partnerID=8YFLogxK
U2 - 10.1557/mrs.2020.274
DO - 10.1557/mrs.2020.274
M3 - Review Article
SN - 0883-7694
VL - 45
SP - 910
EP - 915
JO - MRS Bulletin
JF - MRS Bulletin
IS - 11
ER -