| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Performance Steels
|
| Presentation Title |
Microstructure-Correlated Strain Maps of ‘1D’, ’2D, & ‘3D’ Tests Reveal Strong Lath Martensite Plastic Anisotropy in DP Steel |
| Author(s) |
Tijmen Vermeij, Job Wijnen, Jorn A.C. Verstijnen, Roy L.A. Kerkhof, Casper J.A. Mornout, Vahid Rezazadeh, Ron H.J. Peerlings, Marc G.D. Geers, Johan P.M. Hoefnagels |
| On-Site Speaker (Planned) |
Tijmen Vermeij |
| Abstract Scope |
Lath martensite is an essential constituent of advanced steels, particularly as the strengthening phase in Dual-Phase (DP) steels. Typically considered brittle, lath martensite has also demonstrated significant plasticity. Understanding this contrasting behavior is essential for improving predictions of plasticity and damage in automotive steel parts. We investigate the plasticity and damage mechanisms of lath martensite within DP steels using a combination of '1D', '2D', and '3D' experimental/numerical frameworks. High-resolution strain maps, acquired using SEM-DIC, were subjected to advanced analysis to correlate microstructural features with deformation mechanisms, revealing significant anisotropy in the plasticity of lath martensite. ‘1D’ nano-tensile tests provided insights into initial plasticity under simple loading, while ‘2D’ tests introduced more microstructural complexity, allowing for quantitative comparisons with simulations. The ‘3D’ tests offered a more comprehensive view of plasticity and damage mechanisms representative of bulk material behavior, leading to new insights into the mechanisms and significance of lath martensite plasticity. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Characterization, Mechanical Properties |