Results 151 to 160 of about 7,724 (204)
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Metallurgical Transactions, 1972
A critical appraisal of theory and experiments for both isothermal and forced velocity pearlite is presented. It is concluded for binary systems that both the theoretical models for volume diffusion and boundary diffusion control are well-advanced and adequate for the purposes of experimental test.
M. P. Puls, J. S. Kirkaldy
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A critical appraisal of theory and experiments for both isothermal and forced velocity pearlite is presented. It is concluded for binary systems that both the theoretical models for volume diffusion and boundary diffusion control are well-advanced and adequate for the purposes of experimental test.
M. P. Puls, J. S. Kirkaldy
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On the Decarburization of Surface Pearlite
Metallurgical and Materials Transactions A, 2021Under appropriate conditions, surface pearlite can form on the outer surfaces of specimen. The microstructure evolution during the decarburization of surface pearlite was investigated. Two cementite dissolution mechanisms were observed. The first involved the direct dissolution of cementite into the pearlitic ferrite.
Sai Li +5 more
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Ledge mechanism of pearlite growth: growth velocity of ferrous pearlite
Materials Science and Technology, 1995AbstractAn analysis of available data of the growth offerrous pearlite using moving boundary diffusivities rather than those for stationary grain boundaries is presented. Two ledge growth approaches are tested and compared with the classic Zener–Hillert approach.
M. J. Whiting, P. Tsakiropoulos
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The spheroidization of pearlite
Metal Science, 1977AbstractIn a current publication we show that the kinetics of spheroidization of a deformed Al-CuAl2 eutectic can be explained by a simple geometric model based on Mullins's analysis of thermal grooving of grain boundaries. For this particular eutectic the kinetics are controlled by rapid interface diffusion, but in other systems the controlling rate ...
E. Ho, G. C. Weatherly
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Electron backscatter diffraction on pearlite structures in steel
Journal of Microscopy, 2006 Electron backscatter diffraction measurements were performed on a set of pearlitic steel samples after different heat treatments. The strengths and limitations of the technique with respect to the pearlite issue are presented.
Walentek, Artur +4 more
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Continuum Mechanics and Thermodynamics, 2011
Zener’s model of pearlite transformation in steels can be viewed as the prototype of many microstructure evolution models in materials science. It links principles of thermodynamics and kinetics to the scale of the microstructure. In addition it solves a very practical problem: How the hardness of steel is correlated to the conditions of processing ...
Ingo Steinbach, Mathis Plapp
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Zener’s model of pearlite transformation in steels can be viewed as the prototype of many microstructure evolution models in materials science. It links principles of thermodynamics and kinetics to the scale of the microstructure. In addition it solves a very practical problem: How the hardness of steel is correlated to the conditions of processing ...
Ingo Steinbach, Mathis Plapp
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Ultrasonic attenuation in pearlitic steel
Ultrasonics, 2014Expressions for the attenuation coefficients of longitudinal and transverse ultrasonic waves are developed for steel with pearlitic microstructure. This type of lamellar duplex microstructure influences attenuation because of the lamellar spacing. In addition, longitudinal attenuation measurements were conducted using an unfocused transducer with 10 ...
Hualong, Du, Joseph A, Turner
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The ledge mechanism of pearlite growth
Scripta Metallurgica et Materialia, 1995The nature of the pearlite phase transformation has received much attention over the last decade. Most notably a body of work has presented observations that have been rationalized in terms of the operation of a ledge mechanism during pearlite growth and of a greater role for crystallography than previously accepted.
Whiting, Mark J, Tsakiropoulos, P
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Acta Metallurgica, 1987
Abstract Transmission electron microscopy of the pearlite: retained austenite growth interface in an Fe-0.8 wt%C-12 wt%Mn steel has revealed a direct relationship between growth ledges and the formation of steps on the ferrite-cementite lamellar interface.
S.A. Hackney, G.J. Shiflet
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Abstract Transmission electron microscopy of the pearlite: retained austenite growth interface in an Fe-0.8 wt%C-12 wt%Mn steel has revealed a direct relationship between growth ledges and the formation of steps on the ferrite-cementite lamellar interface.
S.A. Hackney, G.J. Shiflet
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Metallurgical Transactions A, 1977
Pearlite with its lamellae oriented mainly parallel to the longitudinal direction was prepared by Bolling's method of transformation in a steep temperature gradient. The Fe-0.7 pct Mn-0.9 pct C pearlite was drawn into wire and also into strip in dies designed to minimize macroscopically nonuniform deformation.
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Pearlite with its lamellae oriented mainly parallel to the longitudinal direction was prepared by Bolling's method of transformation in a steep temperature gradient. The Fe-0.7 pct Mn-0.9 pct C pearlite was drawn into wire and also into strip in dies designed to minimize macroscopically nonuniform deformation.
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