Current Issue : January - March Volume : 2021 Issue Number : 1 Articles : 5 Articles
In order to avoid subjective estimation of the direction of groove by using a tester in the four-ball friction test, an automatic wear\nangle detection method based on gray difference of inclination angle is proposed in this paper....................................
The Ni-65wt%WC cladding layers were prepared on the surface of Q235 using laser cladding technology, in which the effect of heat\ntreatment on microstructure and tribocorrosion performance was investigated...........................................................
Mechanical and tribological properties of the hard-multilayer TiN-AlTiN/nACo-CrN/\nAlCrN-AlCrO-AlTiCrN coating deposited on WC-Co substrate were investigated.........................................
The objective of this work is to study the tribological behavior of the contacting surfaces of SKD11 grade hardened cold work tool\nsteel against grade SUS304BA austenitic stainless steel. DLC, CrN, TiN, and TiCN films were coated on the surface of the tool\nmaterial to test the tribological performance. Simulation testing with a pin-on-disk was used in this study. The study was done\nunder dry conditions with sliding velocities at 50, 100, and 150 mm/s and contact pressures of 807, 1095, and 1280MPa. The\nresults show that the main problem is the adhesion of the workpiece material on the tool surface. The severity of the adhesion from\nthe workpiece material is proportional to the sliding velocity and the contact pressure between the contacting surfaces. The\ncoefficient of friction between the contacting surfaces has a positive relationship with the adhesion occurring on the tool surface.\nThe hardness of the film coating is useful for preventing wear of the tool material, especially under high pressure between the\ncontacting surfaces. However, it does not prevent the adhesion of workpiece material of low sliding velocity and low contact\npressure conditions. Noncoated SKD11 tool steel has better effectiveness of adhesion performance than CrN, TiN, and TiCN\nfilm coatings....
The exfoliation of graphene has opened a new frontier in material science with a focus on 2D\nmaterials. The unique thermal, physical and chemical properties of these materials have made them\none of the choicest candidates in novel mechanical and nano-electronic devices...............................
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