Abstract Two-way multi-axial forging was performed on a newly designed closed-die tool. The tool operated an MTS 810 material testing system. connected computer recorded force and crosshead displacement as function of time during operation. sample the four-step experiment CuE copper alloy. plastic deformation 0.8 per step, thus rate cumulative equivalent strain 3.2 by end process. speed movemen...

es ist mehr als 100 jahre, das auf der welt die gewinnung von eisen und stahl auf basis von roheisenerzeugung im hochofen erfolgt, in letzten jahren sind die moglischkeiten zum eisengewinnung mit reduzierenden gasen auf verschiedenen verfahren untersucht und zum teil breits in halbtechnischen versuchsanlagen erprobt. in dieser arbeit wird em uberblick auf samtlichen eisengewinnungsver, fahren s...

The hydrostatic extrusion is a new method of extrusion process. The most important advantage of this method is reduction of friction and close tolerance for the coating thickness. In this study, the hydrostatic extrusion simulation of bimetallic wires has performed using of finite element method. In the following the advantages of hydrostatic extrusion compared to the direct extrusion are prese...

The problem of finding a recursive structure for the evaluation of features through a ~running' window is investigated. A general closed form expression is found for features satisfying a direct or indirect recursion condition. It is shown that most of the commonly used features (mean value, energy, autocorrelation function, DFT, Z-transform, entropy, etc.) satisfy these analytic expressions. T...

Forging dies at high temperatures are under contact pressure, variable mechanical loads and thermal shock, furthermore they should withstand wear and friction in a high level. So, in order to increase die life, the selection of die material, coating and hardness is essential. In this review, various methods used for die life enhancement such as carbide coating, using the super alloy stellite 6 ...

Background The performance of TVS, TRS and MRI for the diagnosis of DIE have been separately reported in earlier studies. However, the three methods have not been concurrently compared in terms of their overall performance and classified results as per different anatomical locations of DIE lesions in a large study population. This study was an attempt to compare pelvic magnetic resonance imagin...

This paper presents a novel digital closed loop microelectromechanical system (MEMS) accelerometer with the architecture and experimental evaluation. The complicated timing diagram or complex power supply in published articles are circumvented by using a charge pump system of adjustable output voltage fabricated in a 2P4M 0.35 µm complementary metal-oxide semiconductor (CMOS) process, therefore...