The densification of zinc powders by uniaxial hot pressing is investigated under both isothermal and thermal cycling conditions. Thermal cycling results in enhanced densification kinetics as compared to isothermal compaction at the upper cycle temperature. Using mechanistic models of initial-stage powder densification, the experimental data are analyzed to reveal the creep stress-exponent and a...

A novel anemometer was designed and implemented for simultaneous measurement of velocity and temperature in air flows with a single hot wire probe. The principle of periodically varying the overheat ratio of the wire was selected and applied through a parameterizable electronic chain. The specific methods developed for the calibration procedure and the signal processing are explained. The accur...

In our previous works, the effects of forging and heat treatment variables on microstructure evolution mechanical properties have been studied for an ingot-metallurgy Re-bearing nickel base superalloy. To overcome issues associated with production large-scale ingots fine-grained workpieces, in present work, effect hot was a superalloy prepared via powder metallurgy. The purpose study to reach p...

This paper presents an approach for a holistic simulation of forging processes considering the interactions between forging press, tooling system and forging process. It can be used in coupled simulations and will enable industrial users in forging industry to do simulation-aided tool optimizations in the design stage of newly developed forging dies. The final aim is to reduce the time-consumin...

The Finite-Element-Analysis (FEA) is of major importance for the design and improvement of forging processes. In this field, FEA is traditionally used to predict die fill, residual stresses and forming forces. The intention of the work presented in this paper is the development of an advanced simulation model for the description of phase transformation processes in forging dies based on FEA. Th...

The grain boundary character distribution (GBCD) of a fully-orthorhombic (O) Ti–25Al–24Nb (at.%) microstructure was investigated using electron backscatter diffraction (EBSD). The fine-grained (GS=17 lm) equiaxed microstructure was processed by hot forging and hot-rolling operations performed below the body-centered cubic (bcc) phase transus temperature followed by heat treatment in the O-phase...

The purpose of this research is to achieve the optimal parameters for producing forged aluminium alloy 7075 aircraft door bracket by using finite element modelling (FEM) with commercial DEFORM-3D V6.1 and physical simulations with plasticine and Plexiglas dies. Also, forging speed has been examined as the main factor for controlling to produce a part without any defects. The results of Physical...

The creep behaviour of hot hammer forged Ti-6Al-4V alloy under different forging temperatures has an essential influence on their high-temperature service performance. In this article, the mechanical property and at were first investigated experimentally. Then, in view critical effect microcracks other defects life components forging, characteristics tip a 2 mm crack characterized by finite ele...

The high cost of titanium alloys can be reduced using alternative manufacturing techniques and cheap alloying elements. In this study, the Ti-5Al-2.5Fe alloy, a cheaper α + β alloy than workhorse Ti-6Al-4V, was produced by powder metallurgy combined with hot thermomechanical deformation means forging. forged subsequently subjected to heat treatment at 750 °C for several annealing times in order...