In the recent years, the addition of nitrogen to iron alloys by mechanical alloying has attracted considerable attention. In this paper, mechanical alloying of Fe–18Cr–8Mn powder mixture under a nitrogen atmosphere was considered from the viewpoints of nitrogen supersaturation and phase transformation. By progression of milling, austenitization and amorphization transformations were detected. The contribution of interstitial sites of the nanocrystalline phases to the nitrogen supersaturation was estimated by X-ray diffraction experiments. It was found that the contribution was progressively decreased by increasing the total nitrogen content. Typically, only about 4% of total incorporated nitrogen was distributed among the crystal interstitial sites of the Fe–18Cr–8Mn–2.5N alloy.

Crystal Interstitial Sites Contribution to Nitrogen Supersaturation in Mechanically Alloyed Fe–Cr–Mn–N Alloys. E.Salahinejad, R.Amini, M.Ghaffari, M.J.Hadianfard: Journal of Alloys and Compounds, 2010, 505[2], 584-7