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 | |
| Publication status | Published - 2022 |
| MoE publication type | A1 Journal article-refereed |
Funding
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).
Keywords
- rapid solidification
- phase field method
- crystal plasticity
- residual stress
- dislocation structures