Discontinuous Precipitation in a High-Nitrogen Austenitic Steel
The discontinuous precipitation of a high-nitrogen (0.8 wt%) austenitic steel has been investigated after successive steps of heat treatment at two different temperatures (800 and 850 °C). After each step of heating the material has been examined by X-ray diffraction (XRD), optical microscopy (OM), transmission electron microscopy (TEM), Auger electron spectroscopy (AES) and microhardness tests. The precipitation of Cr2N induces the formation of a secondary austenitic phase, leads to the redistribution of N between transformed and untransformed zones and to local variations of mechanical properties.
T. Chandra, N. Wanderka, W. Reimers , M. Ionescu
L. Rovatti et al., "Discontinuous Precipitation in a High-Nitrogen Austenitic Steel", Materials Science Forum, Vols. 638-642, pp. 3597-3602, 2010