Crimson Publishers-Material Science

Corrosion Behaviour of Friction Stir Welded Aluminium Alloys: Unpredictability and Protection by Uyime Donatus* in Crimson Publishers: Peer Reviewed Material Science Journals The corrosion susceptible regions in friction stir weldments of aluminium alloys are largely unpredictable. Several factors dictate the undesirable susceptibility of an Al alloy friction stir weldment. A change in temper or processing parameters can significantly alter the corrosion behaviour of an Al alloy weldment. Pronounced zonal heterogeneities induced by the welding process causes increased corrosion rate of the susceptible region due to galvanic coupling with the more noble regions. To prevent this, different protection methods and techniques have been employed and are currently being developed. Laser surface melting, post-weld heat treatment, micro-arc oxidation, application of corrosion resistant material, conventional anodizing, and pre-sputter deposition prior to anodizing have all been shown to...

Experimental Study to Improve the Tribological Behaviors of M50 Steel via WS2 Solid Lubricant under High Temperatures-Crimson Publishers Experimental Study to Improve the Tribological Behaviors of M50 Steel via WS2 Solid Lubricant under High Temperatures by Essa FA* in Crimson Publishers: Journal of Materials Science & Technology An experimental investigation is conducted to improve the tribological properties of M50 composites (M). Using WS2 (MW) is investigated under different temperatures (RT, 200, 400, 600, and 800 °C), and constant applied load (12N) and sliding speed (0.2m/s). The XRD, EPMA, FESEM, and EDS Mapping are conducted to understand the major mechanisms leading to improve the tribological properties of the M50 composites. Results suggested that MW provides the best tribological behaviors over the wide temperature range. The friction coefficients of MW are decreased by 13.51% as compared to that of M at 800 °C due to the formation of lubricating tribo-f...