Abstract
We study the ultimate ductility and failure modes of a commercial transformation-induced plasticity (TRIP) 800 steel under different loading conditions with an advanced microstructure-based finite-element analysis. The representative volume element (RVE) for the TRIP 800 under examination is developed based on an actual microstructure obtained from scanning electron microscopy. The ductile failure of the TRIP 800 under different loading conditions is predicted in the form of plastic strain localization without any prescribed failure criteria for the individual phases. This indicates that the microstructure-level inhomogeneity of the various constituent phases can be the key factor influencing the final ductility of the TRIP 800 steel under different loading conditions. Comparisons of the computational results with experimental measurements suggest that the microstructure-based modeling approach accurately captures the overall macroscopic behavior of the TRIP 800 steel under different loading and boundary conditions.
| Original language | English |
|---|---|
| Pages (from-to) | 2592-2604 |
| Number of pages | 13 |
| Journal | Acta Materialia |
| Volume | 57 |
| Issue number | 8 |
| DOIs | |
| State | Published - May 2009 |
| Externally published | Yes |
Funding
Pacific Northwest National Laboratory is operated by Battelle Memorial Institute for the US Department of Energy under Contract No. DE-AC05-76RL01830. This work was funded by the Department of Energy Office of FreedomCAR and Vehicle Technologies under the Automotive Lightweighting Materials Program managed by Dr. Joseph Carpenter. Use of the Advanced Photon Source was supported by the US Department of Energy, Office of Science laboratory, under Contract No. DE-AC02-06CH11357.
Keywords
- Ductility
- Finite-element analysis (FEA)
- Martensitic phase transformation
- TRIP steel
- X-ray diffraction (XRD)