Sliding wear of nanocrystalline Ni-W alloys with grain sizes from 3 to 45 nm, a range which spans the transition in deformation mechanisms from intrato intergranular, is studied through pin-on-disk wear testing. The extreme conditions produced during sliding wear are found to result in structural evolution and a deviation from Archard scaling for the finest grain sizes; in the finest nanocrysta...

Tribological properties of Ethylene-Propylene-Diene-rubber (EPDM) containing electron modified Polytetrafluoroethylene (PTFE) have been investiagted with the help of pin on disk tribometer without lubrication for a testing time of 2 hrs in atmospheric conditions at a sliding speed and applied normal load of 0.05 m·s–1 and FN = 1 N, respectively. Radiation-induced chemical changes in electron mo...

The presence of oxygen in the environment in which a steel sliding system operates will promote a mild form of wear with wear debris consisting mainly of iron oxides. Of the oxidation-dominated mechanisms, mild-oxidational wear (the prefix describes the extent of oxidation and not the wear rate) has been most extensively investigated. In this paper, examples will be used to show that the wear-m...

Surface grafting of polyelectrolyte brush, such as 3-sulfopropyl methacrylate potassium salt (SPMK), on hip implant materials has been reported to reduce the wear of the orthopaedic bearing surface. However, the biotribocorrosion behaviour of the SPMK brush has not been taken into consideration in previous research. In the present study, SPMK was grafted on Co28Cr6Mo alloy through photo-induced...

Floating wind turbine facilities installed in deep sea areas play an essential role carbon dioxide emissions reduction.One of the problems associated with commercialization these is maintenance cost for mooring chains.Therefore,it necessary to establish a quantitative wear evaluation method chains.Wear coefficient measured by tests one physical parameters evaluate performance metals.The pin-on-...

Ledeburitic tool steel X210Cr12 was processed by passing through a semi-solid state with subsequent forming on hydraulic press, thus achieving fine-grained martensitic matrix, uniformly dispersed fine precipitates, and removal of sharp-edged primary chromium carbides. The hardness value over 700 HV10. decomposition austenite the promotion further carbide precipitation were carried out cryogenic...

Production of aluminum matrix composites is widespread because these material provide enhanced mechanical properties compared to aluminum. One the most important parameters of metal matrix composite production is uniform distribution of reinforcing nanoparticles in matrices using the stir-casting method. Second is ensuring high wettability, which is determined by evaluating the properties of ma...

Responding to the PIN cracking attacks from Berkman and Ostrovsky (FC 2007), we outline a simple solution called salted-PIN. A randomly generated salt value of adequate length (e.g. 128-bit) is stored on a bank card in plaintext, and in an encrypted form at a verification facility under a bank-chosen salt key. Instead of sending the regular user PIN, salted-PIN requires an ATM to generate a Tra...

The telephone directory retrieval task requires high-speed partial matching, and many processes run concurrently so there is a need to reduce resource requirements such as CPU power. To realize the high-speed partial matching that satisfies these requirements, this paper proposes a method for generating supplementary index records. This method enables us to retrieve all candidates including all...