Effects of ausforming temperature on bainite transformation, microstructure and variant selection in nanobainite steel
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Date
2013-06-01
Journal Title
Journal ISSN
Volume Title
Publisher
Pergamon-Elsevier Science Ltd.
Abstract
The bainite transformation behavior after plastic deformation of austenite, i.e., ausforming was studied by in situ neutron diffraction and ex situ experiments, and the effects of ausforming temperature was made clear. Ausforming, at a low temperature (573 K) was found to accelerate bainite transformation and produce a characteristic microstructure, whereas at a high temperature (873 K), ausforming had little influence. The reason for the different results stems from the dislocation structure introduced in austenite; planar dislocations remaining on the active slip planes are believed to assist bainite transformation, accompanied by strong variant selection. The variant selection rule that focuses on Shockley partial dislocation was verified from electron backscatter diffraction results. © 2013, Elsevier Ltd.
Description
Keywords
Bainite, Crystallography, Neutron diffraction, Austenite, Dislocations, Backscattering
Citation
Gong, W., Tomota, Y., Adachi, Y., Paradowska, A. M., Kelleher, J. F., & Zhang, S. Y. (2013). Effects of ausforming temperature on bainite transformation, microstructure and variant selection in nanobainite steel. Acta Materialia, 61 (11), 4142-4154. doi:10.1016/j.actamat.2013.03.041