Abstract
The volume increase and shape change during austenite to martensite transformation in dual-phase (DP) steels are largely accommodated in the microstructure by the deformation of the surrounding ferrite matrix. Accurate estimation of transformation-induced deformation of ferrite via experiments and modeling is essential for predicting the subsequent mechanical behavior of DP steels. This study aims to illustrate the disadvantages of simplifying the anisotropic transformation deformation of martensite to isotropic dilatation for modeling the transformation-induced deformation of ferrite. A novel methodology is developed comprising sequential experimental and numerical research on DP steels to quantify transformation-induced strains in ferrite. This methodology combines the results of prior austenite grain reconstruction, phenomenological theory of martensite crystallography and electron backscatter diffraction (EBSD) orientation data to estimate variant-specific transformation deformation. Subsequently, by comparison of full-field micromechanical calculation results on a virtual DP steel microstructure with experimental EBSD kernel average misorientation and geometrically necessary dislocation measurement results it is shown that neglecting the shear deformation associated with the martensitic transformation leads to significant underestimation in the prediction of transformation-induced strains in ferrite.
Original language | English |
---|---|
Article number | 110805 |
Number of pages | 11 |
Journal | Materials and Design |
Volume | 219 |
DOIs | |
Publication status | Published - 2022 |
Keywords
- Dual-phase steel
- Electron backscatter diffraction
- Martensite variants
- Martensitic transformation
- Micromechanical modeling
- Plastic deformation
Fingerprint
Dive into the research topics of 'Effect of the anisotropy of martensitic transformation on ferrite deformation in Dual-Phase steels'. Together they form a unique fingerprint.Datasets
-
Supporting data for the article "Effect of the anisotropy of martensitic transformation on ferrite deformation in Dual-Phase steels"
Atreya, V. (Creator), van Dokkum, J. S. (Creator), Bos, C. (Creator) & Santofimia Navarro, M. J. (Creator), TU Delft - 4TU.ResearchData, 7 Jun 2022
DOI: 10.4121/19411379
Dataset/Software: Dataset