Impact of short-range ordering on yield strength of high manganese austenitic steels

A model is suggested to quantitatively predict the compositional and temperature effects on the yield strength of high manganese austenitic steels. In the model, short-range ordering is considered to be an effective obstacle against the dislocation glide at the yield point, and the required stress to destroy the short-range ordering was calculated by employing the reported cell model as well as ab initio calculations. The obtained stress depends on both composition and temperature and is systematically related to the yield strength. The model is successfully validated with a number of experimental results and can be employed to tailor the yield strength of the high Mn austenitic steels.