Effect of nitrogen on the temperature dependence of the yield strength of austenitic steels

摘要

The temperature dependence of the yield strength R_p0.2 in the range of 4-300K is studied on Cr18Ni16Mn10 steel alloyed with nitrogen or carbon or having no interstitials introduced purposefully. A striking increase of the yield strength of nitrogen steel was observed at temperatures below 100 K in Accordance with previous results. The temperature dependence of stacking fault energy(SFE) in the Range 300-130 K was measured by means of transmission electron microscopy and it was shown that Nitrogen causes a sharp decrease of the SFE with decreasing temperature while no marked temperature Dependence of the SFE was observed in carbon steel.