Abstract
A comprehensive theoretical analysis is made of the kinetics of the α →γ transformation in carbon steels. It is shown that the α →γ transformation process is of the same relaxation nature during the stages of nucleation of grains as well as during the grain-growth stage, and can be described by the relaxation time of the lattice transformation process. Estimates are obtained of the radius of a critical nucleus and of the width of the lattice modification zone. A theoretical estimate is made of the size of austenite grains in carbon steels at laser heating rates in agreement with metallographic data. It is suggested that the acceleration of the diffusion processes during fast heating of steel is due to a moving lattice modification zone. A simple expression, suitable for technological estimates, is proposed for the calculation of the size of austenitic grains as a function of the heating rate and temperature.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
