Mechanical Properties Of High Nitrogen 16cr-2ni-Mn - Mo - N Stainless Steel Synthesized By Mechanical Alloying And Spark Plasma Sintering

16Cr - 2Ni - Mn- Mo - xN (wt.%) stainless steel powders were synthesized by mechanical alloying (MA) of elemental powders and nitrogen-containing ferrochrome (FeCrN) powders alloy. Compaction of resulting powders was carried out using spark plasma sintering (SPS) technology.The microstructural and phase evolution of the powders at different times of alloying, microstructure, phase composition and mechanical properties after SPS were studied. The X-Ray diffraction (XRD) and Scanning Electron Microscopy (SEM) analysis showed that increasing alloying time up to 30 ks improves chemical homogeneity of the powders and promotes the formation of a-phase solid solution for the sample without nitrogen source and incomplete dissolution of FeCrN on the a-phase solid solution for the sample with a nitrogen source. The XRD and SEM analysis of sintering samples showed the formation of a and.-phase solid solution. Tensile and microhardness tests showed increasing of tensile stress and increasing hardness for the sample with a nitrogen source.