TY - JOUR
T1 - Micromechanical modeling approach to single track deformation, phase transformation and residual stress evolution during selective laser melting using crystal plasticity
AU - Lindroos, Matti
AU - Pinomaa, Tatu
AU - Antikainen, Atte
AU - Lagerbom, Juha
AU - Reijonen, Joni
AU - Lindroos, Tomi
AU - Andersson, Tom
AU - Laukkanen, Anssi
N1 - Funding Information:
We acknowledge the support of Academy of Finland through the HEADFORE project, Grant No. 333226 and VTT Technical Research Centre of Finland Ltd. M. Lindroos is grateful to Professor Samuel Forest of MINES ParisTech for valuable discussions related to the model framework.
Publisher Copyright:
© 2021 Elsevier B.V.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/2
Y1 - 2021/2
N2 - Single track scanning is a widely used method to evaluate the effects of rapid solidification of metals and to analyze their printability. Microstructure level stresses play a dominant role in causing material failure during deposition or poor performance on the finished product. This work formulates a thermomechanical crystal plasticity model capable of presenting microscale level evolution and residual state of stresses and strains in a single track event of selective laser melting. The present novel thermomechanical model is a vital piece of an overall workflow to analyze material properties and more complex performance inherent and dependent on the microstructure scale phenomena. The results show effectiveness of the model in addressing microscale residual stress heterogeneities dependent on the melt pool area thermal and microstructural evolution, including micromechanical phase transformations, and their interaction with the surrounding matrix on the studied H13 tool steel. The method is found exceptionally robust in terms of predicting microstructural residual stresses and deformation, while its greatest limiting feature is the requirement of prior solidified microstructure as an input for the computations.
AB - Single track scanning is a widely used method to evaluate the effects of rapid solidification of metals and to analyze their printability. Microstructure level stresses play a dominant role in causing material failure during deposition or poor performance on the finished product. This work formulates a thermomechanical crystal plasticity model capable of presenting microscale level evolution and residual state of stresses and strains in a single track event of selective laser melting. The present novel thermomechanical model is a vital piece of an overall workflow to analyze material properties and more complex performance inherent and dependent on the microstructure scale phenomena. The results show effectiveness of the model in addressing microscale residual stress heterogeneities dependent on the melt pool area thermal and microstructural evolution, including micromechanical phase transformations, and their interaction with the surrounding matrix on the studied H13 tool steel. The method is found exceptionally robust in terms of predicting microstructural residual stresses and deformation, while its greatest limiting feature is the requirement of prior solidified microstructure as an input for the computations.
KW - Additive manufacturing
KW - Crystal plasticity
KW - H13 tool steel
KW - Phase transformation
KW - Selective laser melting
UR - http://www.scopus.com/inward/record.url?scp=85099259779&partnerID=8YFLogxK
U2 - 10.1016/j.addma.2020.101819
DO - 10.1016/j.addma.2020.101819
M3 - Article
AN - SCOPUS:85099259779
VL - 38
JO - Additive Manufacturing
JF - Additive Manufacturing
SN - 2214-8604
M1 - 101819
ER -