This paper aims to develop a new forming technique manufacture long semihollow stepped part. Traditionally, hot backward extrusion is used, but this not suitable because it requires very high load act on the die and punch, especially at contact between punch workpiece. As result, service life of low. Therefore, overcome problem needed. A combined bulging–piercing was proposed developed in resea...

An AZ41 magnesium alloy in the hot-rolled condition without further thermomechanical processing to modify its microstructure was investigated establish suitability for use within a superplastic forming process and optimum parameters. Formability assessed using elevated temperature tensile testing hot gas bulging, across range of strain rates (1×10?1?1×10?3 s?1) temperatures (350?450 °C). Circle...

A bare AISI420J2 punch often suffers from severe adhesion of metallic titanium as well oxide debris particles in dry, cold forging biomedical alloys. This was plasma-carburized at 673 K for 14.4 ks to harden it up 1200 HV on average and achieve carbon supersaturation the carburized layer. employed cold, dry a pure wire into flat plate while reducing thickness by 70%. The contact interface width...

This study investigated the high-speed cutting performance of 7050 aluminum alloy with prefabricated crystal orientations under dry-cutting conditions. Three specimens different were using pre-deformations 10, 15, and 20%, effects parameters on force, surface morphology, tool wear analyzed. The results showed that three-dimensional force initially increased then decreased increase in speed. In ...