Showing papers by "David J. Srolovitz published in 1982"
TL;DR: In this article, a method of describing the thermal fluctuations in the local atomic structure of liquid and amorphous metals in terms of the fluctuations in atomic level stresses is proposed, and the energy of the system is expressed in the terms of these stresses in the elastic approximation.
Abstract: A method of describing the thermal fluctuations in the local atomic structure of liquid and amorphous metals in terms of the fluctuations in the atomic level stresses is proposed. The energy of the system is expressed in terms of these stresses in the elastic approximation. The temperature dependence of the second moments of the stresses is then calculated and shown to be linear with temperature. The glass transition is assumed to take place when the second moments freeze to certain values determined by computer simulation. It is shown that the pressure fluctuations and the shear fluctuations freeze at different temperatures. The glass transition, in the normal sense, is described by the freezing of the pressure fluctuation. This method provides a reasonable estimate of the glass transition temperature, and predicts it to be proportional to the product of atomic volume and bulk modulus. It furthermore provides an explanation of the different relaxation behaviours between the pressure and shear fluctuations.
166 citations
35 citations
TL;DR: A simulation procedure for grain growth has been developed which accounts for local structure and topology in isotropic polycrystalline metals and ceramics as mentioned in this paper, showing that the growth exponent, n < 1/2, is inherent to the grain growth process and is not due to impurities, preferred orientation, etc as had been previously thought.
Abstract: A simulation procedure for grain growth has been developed which accounts for local structure and topology The simulated microstructures show excellent agreement with those found in isotropic polycrystalline metals and ceramics The grain size distribution, topological distribution, and the topology-grain relations are all in excellent agreement with experiment Similarly, the kinetics found also reproduce the experimental results It is suggested that the growth exponent, n < 1/2, is inherent to the grain growth process and is not due to impurities, preferred orientation, etc as had been previously thought