About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
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Microstructure-Sensitive Modeling Across Length Scales: An MPMD/SMD Symposium in Honor of David L. McDowell
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| Presentation Title |
E-32: Crystal Plasticity Simulation of Carbide Effects on Multiscale Mechanical Behavior of AISI 420 Steel |
| Author(s) |
Kegu Lu, Yadong Zhou, Soheil Solhjoo, Maysam Naghinejad, Redmer van Tijum, Yutao Pei, Jan Post |
| On-Site Speaker (Planned) |
Kegu Lu |
| Abstract Scope |
Understanding the impact of precipitates on mechanical behavior is crucial for material design. This study investigates AISI 420 stainless steel, featuring a ferritic matrix with dispersed carbides. Using a multiphase crystal plasticity (CP) model, we examine the effect of carbide characteristics, namely, number, size, volume fraction, and fraction of carbides at grain boundaries (GBs), on multiscale mechanical behavior. The workflow involves generating representative volume elements (RVEs), calibrating CP model parameters, and validating the CP-RVE against experiments. A novel approach captures anisotropy consistent with experiments. RVEs are created by adjusting carbide characteristics to assess their effects on stress-strain response, anisotropy, and micromechanical interactions. Results demonstrate that increased carbide fraction at GBs or higher carbide volume fraction enhances steel strength. The derived empirical equations predict these effects efficiently. Additionally, higher carbide volume fractions increase strain and stress heterogeneity while reducing anisotropy. The CP-RVE model effectively links microstructural features to macroscale properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
ICME, Modeling and Simulation, Mechanical Properties |