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Morphology of bainite and widmanstätten ferrite
Metallurgical and Materials Transactions A, 1994Morphology of bainite and Widmanstatten ferrite in various steels has been investigated by means of microstructural and surface relief observations. It was shown that upper and lower bainite should be classified by ferrite morphology,i.e., lathlike or platelike, and that the morphology of cementite precipitation cannot be the index for the ...
Yasuya Ohmori +4 more
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Lengthening kinetics of ferrite and bainite sideplates
Metallurgical Transactions, 1973The rate of lengthening of ferrite and bainite sideplates and the radius of curvature of the plate edges were measured as a function of reaction temperature in three Fe-C alloys. These data were analyzed on the basis of an equation due to Trivedi. The analysis proved that the mobility of the sideplate edges is limited.
E. P. Simonen +2 more
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Anisotropy in Thermal Expansion of Bainitic Ferrite
Metallurgical and Materials Transactions A, 2014The evolution of local d-spacings between lattice planes of bainitic ferrite in a high strength quenched and tempered structural steel, S690QL1 (Fe-0.16C-0.2Si-0.87Mn-0.33Cr-0.21Mo (wt pct)), has been determined to calculate the thermal expansion behavior.
R. K. Dutta +6 more
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Formation mechanism of bainitic ferrite and carbide
Metallurgical and Materials Transactions A, 1994Superledges on the broad faces of bainitic ferrite plates have been observed with transmission electron microscope (TEM). The observed superledges, ranging from less than 1 to 24 nm in height, are imaged in three dimension by way of tilt operation under TEM.
Hong-Sheng Fang +2 more
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Metals and Materials International, 2019
In this work, low carbon low alloy steel specimens were subjected to suitable heat treatment schedules to develop ferrite–pearlite (FP), ferrite–bainite (FB) and ferrite–martensite (FM) microstructures with nearly equal volume fraction of hard second phase or phase mixture.
Saroj Kumar Basantia +3 more
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In this work, low carbon low alloy steel specimens were subjected to suitable heat treatment schedules to develop ferrite–pearlite (FP), ferrite–bainite (FB) and ferrite–martensite (FM) microstructures with nearly equal volume fraction of hard second phase or phase mixture.
Saroj Kumar Basantia +3 more
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New Insights into Carbon Distribution in Bainitic Ferrite*
HTM Journal of Heat Treatment and Materials, 2018Abstract A number of studies on bainite transformation at low temperature have revealed that bainitic ferrite formed super-saturated in carbon. The most sensible explanation to this is the increased solubility of a tetragonal ferrite lattice, by virtue of synchrotron radiation and X-ray diffraction results, as well as ab-initio ...
R. Rementeria +2 more
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Carbon content of bainite ferrite in 40CrMnSiMoV steel
Materials Chemistry and Physics, 2009A refined method for analysing X-ray diffraction spectrum was used to determine the carbon content of bainite ferrite in 40CrMnSiMoV steel. The supersaturated carbon concentration linearly decreases with increase of isothermal holding time at 310 °C due to the carbon repartition and carbide precipitation.
Kang, M.K. +5 more
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The Nanohardness of Acicular Ferrite and Bainitic Ferrite in Low Carbon Microalloying Steel
Materials Science Forum, 2007Dynamic continuous stiffness measurement (CSM) nanoindentation method was applied to measure nanohardness in low carbon microalloying steel. The matrix hardness for quenched phase and acicular ferrite calculated through analysis of curves is less fluctuated than the raw results, which shows that the analysis of the curves is helpful for determining ...
Cheng Jia Shang +4 more
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Materials Chemistry and Physics, 2015
Abstract It is well documented that much of the strength and hardness of nanostructured, carbide free bainitic steels come from the very small thickness of bainitic ferrite plates. In the current work, the Williamson–Hall method has been used to determine the bainitic ferrite plate thickness.
M.N. Yoozbashi, S. Yazdani
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Abstract It is well documented that much of the strength and hardness of nanostructured, carbide free bainitic steels come from the very small thickness of bainitic ferrite plates. In the current work, the Williamson–Hall method has been used to determine the bainitic ferrite plate thickness.
M.N. Yoozbashi, S. Yazdani
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Transformation of austenite into bainitic ferrite and martensite
Steel Research, 1996The stress induced martensitic transformation in the upper metastable intermediate state of γ-α-transformation in ferrous materials, structured as ferritic bainite, is discussed. The fibrous structured ferritic bainite consists of retained austenite and ferrite platelets growing in the [111]α//[101]γ direction.
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