Effects of high energy nitrogen implantation on stainless steel microstructure
作者： H Pelletier , P Mille , A Cornet , J.J Grob , J.P Stoquert
DOI: 10.1016/S0168-583X(98)00846-5
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摘要: Abstract Low energy ion implantation is known to improve chemical and mechanical surface properties of metals. This treatment often used enhance wear corrosion resistance or life-time fatigue test stainless steel titanium alloys. The aim this work investigate these effects at higher energy, for which deeper (and still not well understood) modifications occur. High fluence (1018 cm−2) 15N 14N implantations 1 MeV have been performed in the 316LL some specimen annealed 200–500°C temperature range. Nitrogen concentration distribution, structure, morphology microhardness examined with Nuclear Resonance Analysis, Grazing Incidence X-Ray Diffraction Nanoindentation, respectively. Precipitates chromium nitride phases a superficial martensitic transformation can be observed, leading significant increase hardness. best result obtained after one hour annealing 425°C, due larger more homogeneous repartition species. In case, near accumulation observed explained terms diffusion precipitation mechanisms.
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