Print Email Facebook Twitter Effect of the anisotropy of martensitic transformation on ferrite deformation in Dual-Phase steels Title Effect of the anisotropy of martensitic transformation on ferrite deformation in Dual-Phase steels Author Atreya, V. (TU Delft Team Maria Santofimia Navarro) van Dokkum, J.S. (TU Delft Team Jilt Sietsma) Bos, C. (TU Delft Team Jilt Sietsma; Tata Steel) Santofimia, Maria Jesus (TU Delft Team Maria Santofimia Navarro) Date 2022 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. Subject Dual-phase steelElectron backscatter diffractionMartensite variantsMartensitic transformationMicromechanical modelingPlastic deformation To reference this document use: http://resolver.tudelft.nl/uuid:139729c7-44fc-4e77-bb5f-becaa9925610 DOI https://doi.org/10.1016/j.matdes.2022.110805 ISSN 0264-1275 Source Materials & Design, 219 Part of collection Institutional Repository Document type journal article Rights © 2022 V. Atreya, J.S. van Dokkum, C. Bos, Maria Jesus Santofimia Files PDF 1_s2.0_S0264127522004270_main.pdf 3.43 MB Close viewer /islandora/object/uuid:139729c7-44fc-4e77-bb5f-becaa9925610/datastream/OBJ/view