Diffusion Rates of Carbon in Iron-Molybdenum and Iron-Tungsten Alloys

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Abstract
Measurements are reported of the influence of tungsten and molybdenum on the diffusion rate of carbon in face-centered iron at 1000°C. Both of these elements slow down the diffusion of carbon, the influence of tungsten being more than twice that of molybdenum. These results are compared with previous measurements on iron-cobalt alloys and other known data. No connection seems to exist between the variation in lattice parameter of face-centered iron and the variation in diffusion rate of carbon.