Results 141 to 150 of about 387 (175)
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Kinetics of bainite transformation in heterogeneous microstructures
Materials Letters, 2012Abstract In classical models for microstructural evolution, the natural dispersion existing in the samples is often neglected. In this paper, we propose a general procedure that takes into account the distribution of austenite grain size on kinetics of bainite transformation in steels. Through this example and by comparison with experimental data, it
Gouné, M. +4 more
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The role of carbon on the kinetics of bainite transformation in steels
Scripta Materialia, 2002Abstract The roles of carbon, cementite precipitation and substitutional alloying elements are discussed with respect to their effects on the bainite transformation kinetics. Our description of the nucleation and growth steps has allowed the derivation of a kinetic model for the overall transformation.
D Quidort, Y Bréchet
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Kinetics model of bainitic transformation with stress
Metals and Materials International, 2018Thermal simulations were conducted on a Gleeble 3800 simulator. The main purpose is to investigate the effects of stress on the kinetics of bainitic transformation in a Fe-C-Mn-Si advanced high strength bainitic steel. Previous studies on modeling the kinetics of stress affected bainitic transformation only considered the stress below the yield ...
Mingxing Zhou +4 more
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On the effect of plasticity on the kinetics of the isothermal bainitic transformation
International Journal of Microstructure and Materials Properties, 2010Forging processes are accompanied by large plastic deformations and residual stresses. Depending on the local cooling rate the deformed material typically is in the stable or the supercooled austenitic state. The results show that plastic deformation of the stable austenite does not accelerate the kinetics of the isothermal bainitic phase ...
Hans Gerd Lambers +2 more
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International Journal of Materials Research, 2017
Abstract The continuous cooling transformation diagram of a low carbon bainitic–martensitic steel was constructed using dilatometry and metallographic methods. It was found that as cooling rate increases, the structure changes from granular bainite to lath martensite.
Reza Vafaei, Ehsan Mohammad Sharifi
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Abstract The continuous cooling transformation diagram of a low carbon bainitic–martensitic steel was constructed using dilatometry and metallographic methods. It was found that as cooling rate increases, the structure changes from granular bainite to lath martensite.
Reza Vafaei, Ehsan Mohammad Sharifi
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The Kinetics of Bainitic Transformation of Roll Steel 75Kh3MF
Metal Science and Heat Treatment, 2018The critical points of steel 75Kh3MF and the temperature of the start of martensitic transformation are determined by a dilatometric method. The thermokinetic and isothermal diagrams of decomposition of supercooled austenite are plotted. The microstructure and microhardness of steel specimens cooled at different rates are studied.
O. A. Kletsova +4 more
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The effect of niobium in solid solution on the transformation kinetics of bainite
Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 1995Abstract A study is made of the effect of niobium in solid solution in microalloyed austenite on the kinetics of transformation to bainite upon cooling, using a combination of dilatometry, scanning and transmission electron microscopy. The steels investigated are three laboratory melts with systematic variations in niobium concentration, and an ...
H K D H Bhadeshia
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Continuous cooling transformation behaviour and bainite formation kinetics of new bainitic steel
Materials Science and Technology, 2016In order to avoid the appearance of soft particles composed of ferrite or pearlite in the actual production of new bainitic steel, the phase transformation behaviour and bainite formation kinetics were investigated by DIL805A dilatometer, optical microscopy, scanning electron microscopy and Vickers-durometer.
Y.-F. Zheng +3 more
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Bainite transformation kinetics Part 1 Modified model
Materials Science and Technology, 1992AbstractAn earlier model for the overall transformation kinetics of bainite has been corrected and modified to be consistent with known details of the mechanisms of bainitic nucleation and growth. A comparison with published experimental data shows that the model is capable of accurately representing the development of transformation as a function of ...
G. I. Rees, H. K. D. H. Bhadeshia
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Kinetics of Martensitic transformation in partially bainitic 300M steel
Materials Science and Engineering: A, 1990Abstract The kinetics of athermal martensitic transformation have been studied in a high silicon steel (300 M), beginning with samples which were first partially transformed to bainitic ferrite. It is found that the way in which the volume fraction of martensite increases with undercooling below the martensite start temperature is not greatly ...
S.A. Khan, H.K.D. Bhadeshia
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