Dislocation density in cellular rapid solidification using phase field modeling and crystal plasticity

Matti Lindroos; Tatu Pinomaa; Kais Ammar; Anssi Laukkanen; Nikolas Provatas; Samuel Forest

doi:10.1016/j.ijplas.2021.103139

Dislocation density in cellular rapid solidification using phase field modeling and crystal plasticity

Matti Lindroos (Corresponding Author), Tatu Pinomaa, Kais Ammar, Anssi Laukkanen, Nikolas Provatas, Samuel Forest

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Abstract

A coupled phase field and crystal plasticity model is established to analyze formation of dislocation structures and residual stresses during rapid solidification of additively manufactured 316L stainless steel. The work focuses on investigating the role of microsegregation related to the intra-grain cellular microstructure of 316L. Effect of solidification shrinkage is considered along with dislocation mediated plastic flow of the material during solidification. Different cellular microstructures are analyzed and the characteristics of the cell core, boundary and segregation pools are discussed with respect to heterogeneity of dislocation density distributions and residual stresses. Quantitative comparison with experimental data is given to evaluate the feasibility of the modeling approach.

Original language	English
Article number	103139
Journal	International Journal of Plasticity
Volume	148
DOIs	https://doi.org/10.1016/j.ijplas.2021.103139
Publication status	Published - 2022
MoE publication type	A1 Journal article-refereed

Keywords

rapid solidification
phase field method
crystal plasticity
residual stress
dislocation structures

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title = "Dislocation density in cellular rapid solidification using phase field modeling and crystal plasticity",

abstract = "A coupled phase field and crystal plasticity model is established to analyze formation of dislocation structures and residual stresses during rapid solidification of additively manufactured 316L stainless steel. The work focuses on investigating the role of microsegregation related to the intra-grain cellular microstructure of 316L. Effect of solidification shrinkage is considered along with dislocation mediated plastic flow of the material during solidification. Different cellular microstructures are analyzed and the characteristics of the cell core, boundary and segregation pools are discussed with respect to heterogeneity of dislocation density distributions and residual stresses. Quantitative comparison with experimental data is given to evaluate the feasibility of the modeling approach.",

keywords = "rapid solidification, phase field method, crystal plasticity, residual stress, dislocation structures",

author = "Matti Lindroos and Tatu Pinomaa and Kais Ammar and Anssi Laukkanen and Nikolas Provatas and Samuel Forest",

note = "Funding Information: ML, TP, and AL wish acknowledge the support of Academy of Finland through the HEADFORE project, Grant No. 333226. NP acknowledges the Natural Sciences and Engineering Research Council of Canada (NSERC) and the Canada Research Chairs (CRD) Program).",

year = "2022",

doi = "10.1016/j.ijplas.2021.103139",

language = "English",

volume = "148",

journal = "International Journal of Plasticity",

issn = "0749-6419",

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TY - JOUR

T1 - Dislocation density in cellular rapid solidification using phase field modeling and crystal plasticity

AU - Lindroos, Matti

AU - Pinomaa, Tatu

AU - Ammar, Kais

AU - Laukkanen, Anssi

AU - Provatas, Nikolas

AU - Forest, Samuel

N1 - Funding Information: ML, TP, and AL wish acknowledge the support of Academy of Finland through the HEADFORE project, Grant No. 333226. NP acknowledges the Natural Sciences and Engineering Research Council of Canada (NSERC) and the Canada Research Chairs (CRD) Program).

PY - 2022

Y1 - 2022

N2 - A coupled phase field and crystal plasticity model is established to analyze formation of dislocation structures and residual stresses during rapid solidification of additively manufactured 316L stainless steel. The work focuses on investigating the role of microsegregation related to the intra-grain cellular microstructure of 316L. Effect of solidification shrinkage is considered along with dislocation mediated plastic flow of the material during solidification. Different cellular microstructures are analyzed and the characteristics of the cell core, boundary and segregation pools are discussed with respect to heterogeneity of dislocation density distributions and residual stresses. Quantitative comparison with experimental data is given to evaluate the feasibility of the modeling approach.

AB - A coupled phase field and crystal plasticity model is established to analyze formation of dislocation structures and residual stresses during rapid solidification of additively manufactured 316L stainless steel. The work focuses on investigating the role of microsegregation related to the intra-grain cellular microstructure of 316L. Effect of solidification shrinkage is considered along with dislocation mediated plastic flow of the material during solidification. Different cellular microstructures are analyzed and the characteristics of the cell core, boundary and segregation pools are discussed with respect to heterogeneity of dislocation density distributions and residual stresses. Quantitative comparison with experimental data is given to evaluate the feasibility of the modeling approach.

KW - rapid solidification

KW - phase field method

KW - crystal plasticity

KW - residual stress

KW - dislocation structures

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U2 - 10.1016/j.ijplas.2021.103139

DO - 10.1016/j.ijplas.2021.103139

M3 - Article

SN - 0749-6419

VL - 148

JO - International Journal of Plasticity

JF - International Journal of Plasticity

M1 - 103139

ER -

Dislocation density in cellular rapid solidification using phase field modeling and crystal plasticity

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