| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
Micromechanical Modeling of Length-scale Effects and Performance of SLM Stainless Steel Microstructures |
| Author(s) |
Matti Lindroos, Samuel Forest, Tatu Pinomaa, Anssi Laukkanen |
| On-Site Speaker (Planned) |
Tatu Pinomaa |
| Abstract Scope |
Stainless steel 316L is known to develop cellular microstructure during selective laser melting. These cellular structures inside the grains contribute to the notably increased strength of the material. To estimate material performance, such as fatigue life of the SLM microstructures, modeling of the deformation behavior require attention to length-scale characteristics in addition to multiple deformation mechanisms, i.e., dislocation slip and deformation twining. A reduced micromorphic crystal plasticity model, akin to strain gradient plasticity, is used to analyze localized effects and provide reasonable regularization to strain localization produced by slip bands and twin concentrations in various 316L SLM microstructures. Emphasis is placed on providing cost-efficient and representative length-scale dependent crystal plasticity model that is usable in virtual materials design workflows. Performance outcomes of different rapidly cooled microstructures, produced by phase field simulations, are discussed, while the effect of local microstructure scale defects are analyzed, and an overall ICME workflow is presented. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |