Results 171 to 180 of about 59,106 (209)

Experimental evidence for non-cubic bainitic ferrite [PDF]

Scripta Materialia, 2013
The first evidence is provided for the existence of a tetragonal or slightly orthorhombic unit cell of bainitic ferrite. It supports the hypothesis that the excess carbon that persists in the ferrite, which is in contact with austenite, is a consequence of an increased solubility due to the change in symmetry from the conventional cubic unit cell.
H K D H Bhadeshia
exaly   +4 more sources

Application of interrupted cooling experiments to study the mechanism of bainitic ferrite formation in steels

Acta Materialia, 2013
New interrupted cooling experiments have been designed to study the kinetics of bainitic ferrite formation starting from a mixture of austenite and bainitic ferrite.
Sybrand van der Zwaag, Hao Chen, John Ågren   +2 more
exaly   +2 more sources

Growth of bainitic ferrite and carbon partitioning during the early stages of bainite transformation in a 2 mass% silicon steel studied by in situ neutron diffraction, TEM and APT

Journal of Applied Crystallography, 2016
In situ neutron diffraction, transmission electron microscopy (TEM) and atom probe tomography (APT) have been used to study the early stages of bainite transformation in a 2 mass% Si nano-bainitic steel. It was observed that carbon redistribution between
Hossein Béládi, Dierk Raabe, I B Timokhina   +2 more
exaly   +3 more sources

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Anisotropy in Thermal Expansion of Bainitic Ferrite

Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 2014
The 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.
Murugaiyan Amirthalingam, Ian Richardson
exaly   +2 more sources

Critical assessment 20: on carbon excess in bainitic ferrite

Materials Science and Technology, 2016
For several decades, the question of carbon supersaturation in bainitic ferrite has attracted the attention of physical metallurgists. Originally, this was associated with excess carbon due to the displacive nature ofphase transformation and its ...
E V Pereloma
exaly   +1 more source

Ferrite and bainite in alloy steels

Metallurgical Transactions, 1972
The addition of alloying elements even in small concentrations can alter the properties and structure of ferrite and bainite. The various morphologies of ferrite-carbide aggregates are surveyed including alloy pearlite, fibrous carbide eutectoids and precipitation of fine alloy carbides atγ-α interfaces.
R. W. K. Honeycombe, F. B. Pickering
openaire   +1 more source

Morphology of bainite and widmanstätten ferrite

Metallurgical and Materials Transactions A, 1994
Morphology 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, Hiroyuki Ohtsubo, Yun Chul Jung, Shuji Okaguchi, Hiroo Ohtani   +4 more
openaire   +1 more source

The Effect of Primary Ferrite on Bainitic Transformation, Microstructure, and Properties of Low Carbon Bainitic Steel

Metal Science and Heat Treatment, 2020
The effects of primary ferrite on bainitic transformation, microstructure, and properties of low carbon bainitic steel Fe – 0.22C – 2.01Si – 2.20Mn – 0.22Mo are investigated by metallographic and dilatometric methods. It is found that the effect of primary ferrite on subsequent bainite formation appears as a change in the ratio of two competing ...
Zhenye Chen, Man Liu, Guang Xu
exaly   +2 more sources

Formation mechanism of bainitic ferrite and carbide

Metallurgical and Materials Transactions A, 1994
Superledges 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, Jia-Jun Wang, Yan-Kang Zheng   +2 more
openaire   +1 more source

Low temperature bainitic ferrite: Evidence of carbon super-saturation and tetragonality

Acta Materialia, 2015
Experimental evidence indicates that bainitic ferrite formed by transformation at low temperatures (200–350 °C) contains quantities of carbon in solid solution far beyond those expected from para-equilibrium.
Matthias Kuntz, Carlos Garcia-Mateo, Lucia Morales-Rivas   +2 more
exaly   +2 more sources