Authors: Yusaku Tomio Goro Miyamoto Tadashi Furuhara
Publish Date: 2016/07/27
Volume: 47, Issue: 10, Pages: 4970-4978
Abstract
Precipitation of fine alloy nitrides near the specimen surface results in significant surface hardening in nitriding of alloyed steels In this study a simulation model of alloy nitride precipitation during nitriding is developed for FeM binary system based upon the Kampmann–Wagner numerical model in order to predict variations in the distribution of precipitates with depth The model can predict the number density average radius and volume fraction of alloy nitrides as a function of depth from the surface and nitriding time By a comparison with the experimental observation in a nitrided FeCr alloy it was found that the model can predict successfully the observed particle distribution from the surface into depth when appropriate solubility of CrN interfacial energy between CrN and α and nitrogen flux at the surface are selected
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