The effect of surface mechanical attrition treatment on low temperature plasma nitriding of an austenitic stainless steel

SURFACE & COATINGS TECHNOLOGY

卷:221

Article

Chemkhi, M.¹  Retraint, D.¹  Roos, A.¹  Garnier, C.¹  Waltz, L.²  Demangel, C.³  Proust, G.⁴ 

[1] Univ Technol Troyes, Charles Delaunay Inst, LASMIS, UMR STMR CNRS 6279, F-10004 Troyes, France

[2] Lab Mecan & Genie Civil LMGC Montpellier, F-34090 Montpellier, France

[3] CRITT MDTS, F-08000 Charleville Mezieres, France

[4] Univ Sydney, Sch Civil Engn, Sydney, NSW 2006, Australia

关键词: Surface diffusion;    SMAT;    Nanocrystalline materials;    Plasma nitriding;    Austenitic stainless steels;   

DOI  :  10.1016/j.surfcoat.2013.01.047

来源: Elsevier

【 摘 要 】

The combined effect of superficial nanoaystallisation by SMAT (Surface Mechanical Attrition Treatment) followed by plasma nitriding on the mechanical properties of a medical grade austenitic stainless steel was studied. SMAT conditions were optimised to enhance nitrogen diffusion. Experimental observations (energy dispersive X-ray spectroscopy profiles, cross-sectional optical micrographs, phase analysis by X-ray diffraction and micro-hardness profiles) show that polishing away a very thin layer after SMAT and before nitriding significantly improves nitrogen diffusion into the substrate, yielding a 50% thicker nitrided layer. Possible causes for this improvement are discussed. (C) 2013 Elsevier B.V. All rights reserved.

【 授权许可】

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