title: Ti-WC nanocrystalline coating formed by surface mechanical attrition treatment process on 316L stainless steel.
abstract: Nanocrystalline coatings were performed on the surface of 316L stainless steel plates mechanically with a mixture of Ti and WC powders under vacuum conditions. The targets were replaced in the end of the high energy milling rig, while Ti-WC mixture was milled as usual. It is shown that the coatings are nanocrystalline in nature with narrow distribution of average size of nanocrystallites. X-ray diffraction and scanning electron microscopy (with energy-dispersive spectrometer) revealed that the top layer of the coatings is uniform. Microhardness, roughness and primary corrosion tests (tafel tests) proved enhancement of coated samples with respect to raw materials. Transmission electron microscope image of deformed surface confirmed surrounding of nanoparticles by dislocation loops after plastic deformation.
authors.affiliation: Department of Materials Engineering, Faculty of Engineering, Tarbiat Modares University, P.O. Box: 14115-143, Tehran, Iran.
authors.forename: M
authors.initials: M
authors.lastname: Aliofkhazraei
authors.forename: A Sabour
authors.initials: AS
authors.lastname: Rouhaghdam
authors.forename: E
authors.initials: E
authors.lastname: Ghobadi