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Friction surfacing is a method suitable to generate a wide variety of metallic coatings by means of frictional heating and severe shear deformation. It is a solid-state joining method, and therefore may be applied to non-fusion weldable as well as non-deformable brittle materials, as Cr-based alloys are. In the present study coatings of Cr60Ni40 alloy are generated onto Nimonic 80A substrates. Microstructural...
Tribochemical reactions in a protein lubricated metal-on-metal (MoM) sliding contact may play a significant role for its wear performance. Such reactions lead to the formation of a carbonaceous ‘tribofilm’, which can act as a protective layer against corrosion and wear. The purpose of this study was to determine the effect of contact load on wear and the formation and retention of tribofilms.Wear...
Metal-on-metal hip arthroplasties have been successfully implanted for many years. During the last decade the metal-on-metal hip resurfacing has also experienced a renaissance. Both perform low wear rates due to nano-meter-scale wear particles. These particles represent a limitation causing harm to the human body.In order to investigate the emission of wear particles in ultra-low wear systems micro-structural...
The main goal of the present investigation was to understand the acting wear mechanisms for a microtextured high-nitrogen stainless steel under self-mating sliding wear conditions. Therefore, the worn surface and subsurface was observed by means of scanning and transmission electron microscopy, respectively. It was shown that the alloying with nitrogen has a distinct effect on the dislocation movement...
Wear debris from artificial metallic implant joints is known to provoke detrimental foreign-body reactions in the surrounding human tissue. Although commonly used biotolerant metals generate only a little amount of particles, wear is still a major cause for concern. It is the aim of this work to evaluate the sliding wear resistance of a topologically modified high-nitrogen austenitic stainless steel...
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