Precipitation Process of Carbon in Alpha-Iron

Abstract

The precipitation process of carbon in alpha-iron was studied by measuring the internal friction, and by observing the precipitates by electron microscope. The experimental results are expressed fairly well by the formula which expresses the sum of the two processes, one being the absorption of carbon atoms by the precipitates by way of dislocations and the other being the absorption of carbon atoms through the surfaces of the precipitates by the diffusion-limited process. The observation of the precipitates supports this explanation of the precipitation process.