A5028385707- Microstructure and mechanical properties
- Surface Treatment and Residual Stress
- Advanced Welding Techniques Analysis
- Titanium Alloys Microstructure and Properties
- Additive Manufacturing Materials and Processes
- Advanced materials and composites
- Welding Techniques and Residual Stresses
- Aluminum Alloys Composites Properties
- Surface Treatment and Coatings
- Mechanical and Thermal Properties Analysis
- High-pressure geophysics and materials
- Metal Forming Simulation Techniques
- Engineering Technology and Methodologies
- Fusion materials and technologies
- Electromagnetic Effects on Materials
- Metallurgy and Material Forming
Institute of Metal Superplasticity Problems
2017-2023
Bashkir State University
2014-2018
Russian Academy of Sciences
2018
Institute of Technical Acoustics
2014
Ultrasound is widely used in the treatment of materials. Its applications melt processing, surface hardening or finishing, metal forming, welding, etc., are well known and have been reviewed numerous review articles books. Among ultrasound-assisted processes, direct action ultrasonic waves on structure properties bulk materials special interest. Ultrasonic induce oscillating shear stresses which exert mechanical forces crystal lattice defects, primarily dislocations, can yield a number...
Effect of ultrasonic treatment (UST) on the microstructure and microhardness ultrafine grained nickel processed by high pressure torsion (HPT) was studied. With this aim, samples after HPT were subjected to oscillating compression-tension stresses with amplitudes 15, 30, 45, 60 90 MPa in zone strain antinode an instrument. The initial ultrasonically treated studied X-ray diffraction analysis, transmission electron microscopy back-scatter (EBSD). Dependences average dislocation density,...
Impact strength tests of nickel samples exposed to equal-channel angular pressing (ECAP) were carried out. The influence annealing and ultrasonic treatment with stress amplitudes 20, 50 100 MPa on the impact fracture ultrafine grained processed by ECAP was shown.<br />
Joints of copper sheets with a thickness 0.8 mm were produced by ultrasonic welding. To assess the quality joints, tensile lap-shear strength, area fraction bonding, distributions normal strains in cross sections welded samples, linear weld density at magnification ×1000, and microstructure microhardness samples analyzed. It was proved that arrangement microbonds length gaps joint zones significantly depended on local caused penetration tool ridges under clamping pressure. Joint regions more...
Effect of ultrasonic treatment (UST) with an amplitude oscillating tension-compression stresses 100 MPa on the characteristics superplastic deformation Ti-6Al-4V alloy ultrafine grained (UFG) structure processed by equal-channel angular pressing (ECAP) is studied. During tensile tests at 600°C initial strain rates in interval from 10 -4 to -3 s -1 , ultrasonically irradiated samples exhibit a reduced flow stress, higher values rate sensitivity coefficient and elongation failure as compared...
Commercially pure nickel was processed by equal-channel angular pressing (ECAP) and subjected to ultrasonic treatment (UST) with a stress amplitude of 100 MPa. The microstructure, microhardness mechanical properties the deformed sonicated samples were studied. It shown that UST affected microstructure ECAP nickel. A refinement grains in longitudinal section, changes texture, an increase dislocation density microstrain observed. Tensile tests have elongation failure without any noticeable...
Abstract This work presents the results of a study mechanical properties titanium alloy Ti-5Al processed by equal channel angular pressing (ECAP) and ultrasonic treatment (UST). The UST was carried out at frequency 20 kHz with an amplitude oscillating tension-compression stresses 100 MPa. It shown that subjected to exhibited low temperature superplastic properties. Its elongation exceeded value 300%, coefficient m 0.3 strain rate 1.7×10 −4 1/s.
Abstract The results of the study on microstructure and properties solid state joints titanium sheets obtained by ultrasonic welding (USW) with frequency 20 kHz vibration amplitude μm during 2 3 s under a 6 kN clamping force are presented. thermo-mechanically affected zone is observed along defect-free weld line (joint). It was found that length width this increased time. In zone, significant grain growth takes place, change in texture maxima near 60° 90° boundary misorientation...
Abstract Improving the superplasticity characteristics of alloys widely used in industry, such as titanium alloy Ti-6Al-4V, is an important practical problem. Processing by methods severe plastic deformation can reduce temperature superplasticity. However, material exhibits high flow stresses. In this work we studied effect preliminary ultrasonic treatment with amplitude oscillating tension-compression stresses 100 MPa on Ti-6Al-4V processed equal channel angular pressing (ECAP). It shown...
Abstract Effect of oscillating tension-compression stresses on a nonequilibrium grain boundary containing disclination dipole in titanium is studied by means molecular dynamics simulations. The system with was constructed joining two bicrystals tilt boundaries Ɵ = 36.87 ° and 28.07 °, thus the had strength ω 8.8 °. relaxed equilibrated at temperature T=300 K for 200 ps. Then sinusoidal stress σ 0 ×sin (2πt / τ) period τ 160 ps applied along x axis same its effect structure bicrystal studied....
Abstract The results of studies on the development instruments for ultrasonic welding (USW) metals, which is basic process additive manufacturing, are presented. influence parameters (static loading and time) microstructure strength joints produced by USW commercially pure copper, nickel titanium studied. Preliminary first metals in an ultrafine grained (UFG) state presented prospects using UFG manufacturing evaluated.
УЛЬТРАЗВУКОВАЯ СВАРКА МЕТАЛЛОВ: ОБОРУДОВАНИЕ