Rectangular waveguide is one of the earliest types of transmission lines. Rectangular waveguide can be produced by hot extrusion process. In this paper, the hot extrusion process of CuZn5 rectangular waveguide was investigated by Finite Element Method (FEM). In addition, Genetic Algorithm (GA) was used to optimize the die geometry and process conditions to achieve the lowest magnitude of extrus...

In any metal forming process, both the strain rate and deformation rate depend on the die profile. The die profile also, is responsible for the non-uniformity of the deformation along the cross-section. These affect the quality and mechanical properties of the product. Therefore, if a die is designed, in which the affecting variables can be controlled spontaneously it is hoped to obtain a produ...

Langmuir is published by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Large scale hexagonal domainlike structures superimposed on the atomic corrugation of a graphite surface observed by scanning tunneling microscopy Chong Yang. Liu, Hsiangpin. Chang, and Allen J. Bard Langmuir, 1991, 7 (6), 1138-1142 • DOI: 10.1021/la00054a020 Downloaded from http://pubs.acs....

Rail corrugation is a common railway defect that involves diverse and complex factors. grinding also the most commonly used method to address corrugations. Through numerous irregularity tests one-third octave frequency spectrum analyses, this study determined characteristics development process for rail on high-speed tracks. The vibration transmission properties of train were tested using force...

Abstract A systematic study of carbon dioxide in wedge pores under subcritical conditions were conducted with Grand Canonical Monte Carlo simulation. The effects various factors: temperature, pore geometry (i.e., width, length, tilt angle and corrugation), on the formation stepwise isotherms, particularly investigated. occurrence this step-wise adsorption behaviour is correlated to alternate pa...

The purpose of introducing ultrasonic vibrations in the tube hydroforming process is to create more formability by obtaining a lower corner radius, improve thickness distribution of the wall and provide good tribological conditions at the tube and the die interface. Vibrations imposed on the die create alternating gaps which improve the formability in the tube hydroforming process in the presen...