Results 171 to 180 of about 1,989 (204)

The bainite transformation in a silicon steel

Metallurgical Transactions A, 1979
An experimental silicon steel has been used in a detailed kinetic and structural study of the bainite transformation in an attempt to resolve some of the controversies concerning the reaction mechanism. Distinct reaction ‘C’ curves and transformation mechanisms were observed for the upper and lower bainite reactions. The observed set of three minima in
H. K. D. H. Bhadeshia, D. V. Edmonds
openaire   +1 more source

Autocatalysis in bainite transformations

Materials Science and Engineering: A, 2000
The objective of the study is to provide a better account of the autocatalysis phenomenon in bainite transformation in steels. The phenomenon of autocatalysis is related to the nucleation of ferrite subunits at the surfaces of bainite sheaves during transformation. The analytical forms of the effective nucleation rate are derived based on two different
openaire   +1 more source

Bainitic transformation of steels

Journal of Materials Science Letters, 1986
Presentation des derniers resultats experimentaux: courbes TTT et etude microstructurale par microscopie electronique a balayage relatifs a la transformation bainitique de l'acier non allie (0,38 C-0,23 Si-1,4 Mn-0,22 Cr-0,18 Ni)
openaire   +1 more source

Bainitic Transformations in Titanium Alloys

Physics of Metals and Metallography, 2021
A large number of factors have an effect on the features and conditions of bainitic (intermediate) transformations in titanium alloys, namely: the type of phase diagram, the position of the eutectoid temperature, the eutectoid composition, the temperature of the start of martensitic transformation, and the rate of diffusion processes.
openaire   +1 more source

The bainite transformation: unresolved issues

Materials Science and Engineering: A, 1999
Abstract A great deal of research, over many decades since the discovery of bainite, has revealed substantial information about the mechanism of the bainite transformation in steels. Elements of the theory are now routinely being used in many parts of the world in the design of novel alloys and in the interpretation of a variety of experimental data.
openaire   +1 more source

Bainite transformation in deformed austenite

Metallurgical Transactions A, 1976
In this work the effect of deformation of metastable austenite on its subsequent isothermal decomposition in bainite regions was investigated in three chromium steels with varying carbon contents. Four different types of treatments were used and the effect of carbon content was studied.
Rudolf Freiwillig, Jirí Kudrman, Pavel Chráska   +2 more
openaire   +1 more source

The bainite transformation

2004
«The mechanism of bainite formation has been the subject of numerous original research papers and reviews for almost a century hut without any signs of controversies being resol ved. For beginners and even for experts in related fields this wealth of information has been very confusing...» M Hillert in Preface to the Viewpoint Set on: Bainite“[Hil02 ...
openaire   +1 more source

The effect of hydrogen on the bainite transformation

Journal of Materials Science, 1999
The effect of hydrogen on the upper bainite transformation in two silicon containing steels has been investigated. For comparison, isothermal transformation at the same temperature has also been performed in a helium atmosphere. In both Fe-0.2C-3Mn-2Si and Fe-0.4C-4Ni-2Si (nominal wt %) alloys it was discovered that the bainite reaction proceeds ...
H. K. Yalci, D. V. Edmonds
openaire   +1 more source

Influence of Co and Al on Bainitic Transformation in Super Bainitic Steels

steel research international, 2013
AbstractThe effect of cobalt and aluminum addition on the bainitic transformation of super bainitic steels was investigated. Nanostructured bainitic ferrite and retained austenite microstructures were obtained when the steels were transformed at low temperatures. The bainitic transformation was accelerated by the addition of Co and Al. The thickness of
Feng Hu, Kai‐Ming Wu, Hua Zheng
openaire   +1 more source

Effects of ausforming strain on bainite transformation in nanostructured bainite steel

International Journal of Minerals, Metallurgy, and Materials, 2017
The effects of ausforming strain on bainite transformation in high-carbon low-alloy nanobainite steel were investigated using a Gleeble 3500 thermomechanical simulator machine. The bainite transformation speed at 300°C was found to be accelerated by ausforming at 300, 600, and 700°C under applied strains ranging from 10% to 50% followed by isothermal ...
Hong-liang Fan, Ai-min Zhao, Qing-chun Li, Hui Guo, Jian-guo He   +4 more
openaire   +1 more source