The precipitation of tungsten nitride upon internal nitriding of ferritic Fe0.5 at.% W alloy was investigated at 610 °C in a flowing NH3/H2 gas mixture. Different tungsten nitrides developed successively; the thermodynamically stable hexagonal δ-WN could not be detected. The state of deformation of the surface plays an important role for the development of tungsten nitride at the surface. The m...

in this study, the effect of grain size on nitrogen diffusion into ck45 has been investigated. in order to obtain different grain sizes, samples were annealed and normalized at various temperatures and durations.the grain size was determined with clemex vision software. then, the specimens were exposed to dc plasma nitriding treatment and again analyzed by optical microscope ,scanning electron ...

Abstract The impact of plasma nitriding on the microstructure and hardness a recently developed 4 wt.-% medium manganese steel are presented. In contrast to standard quench tempering steels, investigated material achieves its martensitic by air-cooling from forging heat, which enables reduction carbon footprint forged components. influence this grade has not been so far, but fundamental differe...

Titanium and its composites are widely used in implants of bones teeth. Besides mechanical properties also surface characteristics very important these biomaterials. Very such as topography, roughness, chemistry, energy, wettability, Ti oxides or nitride layers thickness. The concentrated solar power was successfully to Grade 2 powder metallurgical prepared from hydrogenated dehydrogenated powd...