The article considers one of the combined methods severe plastic deformation (SPD), which includes twist extrusion (TE) and subsequent rolling. use forming is promising for industrial use. Titanium grade 1 was used as a material in experiments. Rolling carried out three stages with decrease temperature from 350°C to 180°C number passes heating. accumulated strain degree e = 4.6 at 3 Increasing ...

Meso-scale surface roughening evolution in 6022-T4 Al sheets was investigated using plane-strain tension. Formation of grain-scale hills and valleys and their relation to the morphologies and corresponding orientations of surface grains after deformation were examined experimentally. These observations were analyzed using various approaches based on the Schmid and Taylor crystal plasticity mode...

Cold rolled sheet metal often used in laser forming exhibits anisotropic properties, which are mostly caused by preferred orientations of grains developed during the severe plastic deformation. In present study, the textures of cold-rolled mild steel sheets are characterized and the influence of the plastic anisotropy on laser forming process is investigated. Deformation textures are measured i...

Abstract Rolling speed ratios during the rolling process are critical to ring forming in this pepper. The selected roll feed mode is constant with increasing of diameter main stage. Based on Deform-3D finite element software, a large size φ1530 mm was taken as research object. numerical model 40Cr13 stainless steel established. radial-axial rings under different increase speeds simulated, and c...

Uniform antimony (Sb) nanotubes were successfully synthesized via a facile solvothermal method without the need for any surfactants or templates. The Sb nanotubes are confirmed to be pure rhombohedral phase and have better crystallinity. These nanotubes show middle-hollow and open-ended structures, as well as multi-walled structures with the wall thickness of about 10 nm. Also, they have an ave...

A method of tube joining by plastic deformation has efficient, reliable and environmentally friendly features, so that it is widely applied into the fabrication aviation pipeline. Internal rolling potential to join high strength titanium alloy tubes withstanding pressure medium with better sealing performance. Taking TA18 as case material, this presentation combines numerical modelling experime...

Using molecular dynamics simulations, we show that sheared solutions of cylindrical micelle-forming amphiphiles behave very differently under extreme confinement as compared to the bulk. When confined to ultrathin films, the self-assembled cylindrical micelles roll along the shearing direction and align parallel to each other with their axes along the vorticity direction, as opposed to aligning...

there is a complicated relation between cold flat rolling parameters such as effective input parameters of cold rolling, output cold rolling force and exit thickness of strips. in many mathematical models, the effect of some cold rolling parameters has been ignored and the outputs have not a desirable accuracy. in the other hand, there is a special relation among input thickness of strips, the ...