Investigation of the influence of the thickness of nanolayers in wear-resistant layers of Ti-TiN-(Ti,Cr,Al)N coating on destruction in the cutting and wear of carbide cutting tools

The Effect of Elemental Composition and Nanostructure of Multilayer Composite Coatings on Their Tribological Properties at Elevated Temperatures

“…Coatings were deposited through the filtered cathodic vacuum arc deposition (FCVAD) [5,7,[25][26][27][28][29] technology. The experiments were carried out using a unit VIT-2, (IDTI RAS -MSTU STANKIN, Russia) with two arc evaporators with a pulsed magnetic field and one arc evaporator with filtering the vapor-ion flow.…”

“…The proposed method is based on a physical model [25] (Figure 1), which reflects with sufficient accuracy the actual conditions of friction and wear at a local contact in the cutting area. In accordance with this model, a spherical indenter 2 made of a coated tool material (imitating an individual asperity of a contact spot of solids subject to friction), compressed by two plane-parallel counterbodies 1 made of the material being machined (with high precision and cleanliness of the contacting surfaces) rotates under load around its own axis.…”

“…an adhesion component, which results from the solid body molecular interaction in the actual contact area, and a deformation component, which result from the surface layer deformation on solid bodies during the friction process [31]. In [25], the proposed model demonstrated that the forces to rotate the indenter were mainly related to the shear stress of the adhesive (interatomic and intermolecular) bonds, while in this case, no deformation component of the tangential forces was actually detected. Under the conditions of seizure, no deformation or fracture occur on the contact surface during the sliding, while the detected maximum tangential stresses reflect the hardness of near-surface layer of the softest body out of all the contacting bodies.…”

“…To apply the above method under the conditions of elevated temperatures, a special adhesiometer was developed, which allowed heating the contact area to a temperature of up to 1100°C and providing the typical temperature distribution over the depth of the contacting bodies [25]. Certain shortcomings of the above method include the relatively low rates of deformation and relative sliding.…”

An experimental analysis of the influence of electrolyte compositions, current density and duration of the micro­arc oxidation process on the structural­phase state and properties of VT3­1 titanium alloy

“…Plasma processes have recently become the basis of modern surface hardening technologies [1,2]. Due to the strong disequilibrium of such processes, it is difficult to simulate them [3,4], therefore, to predict the properties obtained as a result of plasma technologies of materials, the method of structural engineering began to be used [5,6].…”