Print Email Facebook Twitter High-resolution X-ray diffraction investigation on the evolution of the substructure of individual austenite grains in TRIP steels during tensile deformation Title High-resolution X-ray diffraction investigation on the evolution of the substructure of individual austenite grains in TRIP steels during tensile deformation Author Blondé, R.J.P. Jimenez-Melero, E. Huizenga, R.M. Zhao, L. Wright, J. Brück, E.H. Van der Zwaag, S. Van Dijk, N.H. Faculty Delft University of Technology Date 2014-06-01 Abstract The martensitic transformation behaviour of the metastable austenite phase in low-alloyed transformation-induced plasticity (TRIP) steels has been studied in situ using high-energy X-ray diffraction during deformation. The austenite stability during tensile deformation has been evaluated at different length scales. A powder diffraction analysis has been performed to correlate the macroscopic behaviour of the material to the observed changes in the volume phase fraction. Moreover, the austenite deformation response has been studied at the length scale of individual grains, where an in-depth characterization of four selected grains has been performed, including grain volume, local carbon concentration and grain orientation. For the first time, a high-resolution far-field detector was used to study the initial and evolving structure of individual austenite grains during uniaxial tensile deformation. It was found that the austenite subgrain size does not change significantly during tensile deformation. Most austenite grains show a complete martensitic transformation in a single loading step. Subject TRIP-assisted steelmartensitic transformationsynchrotron radiationhigh-resolution characterization To reference this document use: http://resolver.tudelft.nl/uuid:82b0001a-8ae4-47cc-822b-1c2d8dc15826 DOI https://doi.org/10.1107/S1600576714008553 Publisher International Union of Crystallography ISSN 0021-8898 Source Journal of Applied Crystallography, 47 (3), 2014 Part of collection Institutional Repository Document type journal article Rights (c) 2014 International Union of Crystallography Files PDF Blonde_2014.pdf 1.04 MB Close viewer /islandora/object/uuid%3A82b0001a-8ae4-47cc-822b-1c2d8dc15826/datastream/OBJ/view