Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 638, Issue -, Pages 219-227Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2015.04.075
Keywords
Quenching and Partitioning; Retained austenite stability; In-situ Electron Backscatter Diffraction (EBSD); Micro-tensile deformation
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Funding
- Governmental Institute for the Promotion of Innovation by Science and Technology in Flanders (IWT)
- project New advanced high strength steels by the Quenching and Partitioning process (NewQP) [RFCS-CT-2011-00017]
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The effect of the microstructural characteristics of retained austenite on its transformation stability in steel after Quenching and Partitioning (Q&P) was studied via interrupted tensile tests and Electron Backscatter Diffraction measurements on a pre-determined zone of a micro-tensile test sample. The evolution of the retained austenite fraction was obtained as a function of the plastic strain. The dependence of the austenite transformation stability on the corresponding grain size, morphology, and local crystallographic orientation was discussed. Furthermore, the importance of the parameters on the austenite stability was analysed and it was shown that the austenite grains rotated, in addition to being transformed, constituting therefore an additional contribution to the ductility of Q&P steel. (C) 2015 Elsevier B.V. All rights reserved.
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