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

Research output: Contribution to journalArticleScientificpeer-review

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 languageEnglish
Article number103139
JournalInternational Journal of Plasticity
Volume148
DOIs
Publication statusPublished - 2022
MoE publication typeA1 Journal article-refereed

Keywords

  • rapid solidification
  • phase field method
  • crystal plasticity
  • residual stress
  • dislocation structures

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