期刊
INTERNATIONAL JOURNAL OF PLASTICITY
卷 148, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijplas.2021.103139
关键词
Rapid solidification; Phase field method; Crystal plasticity; Residual stress; Dislocation structures
资金
- Academy of Finland [333226]
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Canada Research Chairs (CRD) Program
- Academy of Finland (AKA) [333226] Funding Source: Academy of Finland (AKA)
A coupled phase field and crystal plasticity model is used to analyze the formation of dislocation structures and residual stresses during the rapid solidification of additively manufactured 316L stainless steel. The study reveals the significant influence of microsegregation related to the intra-grain cellular microstructure on the microstructure and mechanical properties.
A coupled phase field and crystal plasticity model is established to analyze formation of dislo-cation 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 micro-structures 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.
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