The Effect of Plastic Deformation on Nitrogen Diffusion in α-Fe
The surface diffusion layers formed in preliminary deformed (350 %) -Fe after nitriding at 853 K in ammonia medium were studied by means of metallography, electron microscopy, microhardness test and X-ray powder diffractometry. The preliminary plastic deformation (PPD) effects non-monotonously on the structure, microhardness and thickness of nitride - and -phases layers formed in -Fe. The narrow intervals of deformations of 3-8 % and 20-30 % were found in which the accelerated formation of nitride - and -phases occurs.
B.S. Bokstein, A.O. Rodin and B.B. Straumal
L. Demchenko and S. I. Sidorenko, "The Effect of Plastic Deformation on Nitrogen Diffusion in α-Fe", Defect and Diffusion Forum, Vols. 309-310, pp. 155-160, 2011