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A spheroidization processing has been designed for the forged ultrahigh carbon steels (UHCSs) containing Al, in which the mechanism of the divorced eutectoid transformation is applied. Guided by the CALPHAD calculations, the processing is carried out by two periods consisting of austenization at an intermediate temperature in the three-phase(γ+α+cementite)-zone and then isothermal annealing at a temperature...
A relationship between the growth kinetics and the topology of individual grains in three dimensions, as an equivalent to Von Neumann's law in two dimensions, was derived theoretically. The relationship depicts that the changing rate of the surface area of an individual three-dimensional grain, other than that of grain volume, is independent of grain size and proportional to (F-F c ), where...
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