| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
On the Selection of Flow Rule and Slip System in Crystal Plasticity Simulations of Cyclic Deformation in Martensitic Steels |
| Author(s) |
Tim Fischer, Carl F.O. Dahlberg, Peter Hedström |
| On-Site Speaker (Planned) |
Tim Fischer |
| Abstract Scope |
The prediction of microscopic fatigue crack initiation in high-strength steels requires constitutive models that reflect the local stress and strain fields as accurately and efficiently as possible. Only few research works have been devoted to the investigation of the power law-based flow rule (Hutchinson or Chaboche) and the slip systems ({110}<111> and {112}<111>) in crystal plasticity simulations of body-centred cubic metals under cyclic loading. This paper, aims to shed some light on these two effects by studying a lath martensite-based high-strength steel under varying loading conditions. It can be shown that the commonly used Hutchinson and Chaboche flow rule provide comparable predictions. However, using the Hutchinson setting increases the computational performance considerably. If plastic deformation is assumed not only on the slip systems {110}<111>, but also on the {112}<111> type, a clear redistribution of the local stresses occurs. The Hutchinson flow rule performance remains less affected by this. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, Iron and Steel |