Simulation of New Multilayer Waveguides by Explosion Welding

2021 ◽  
Vol 410 ◽  
pp. 155-160
Author(s):  
Iurii V. Savchenko ◽  
Alexander A. Shapoval ◽  
Yana S. Paleshko
Keyword(s):  
Edge Effects ◽  
Explosion Welding ◽  
Wave Formation ◽  
Rigid Base ◽  
Homogeneous Material ◽  
Cylindrical Waveguides

The possibility of obtaining multilayer cylindrical waveguides by explosion welding is investigated. The fact that the technological welding scheme has a significant impact on the shaping of workpieces and the value of edge effects was established. The studies demonstrated that the nature of wave formation during the manufacture of multilayer cylindrical waveguides from a homogeneous material by explosion welding using a central rod is identical to the wave formation when welding flat multilayer compositions on a rigid base.

scholarly journals TEMPERATURE MEASUREMENT AT THE BOUNDARY OF THE JOINT AND HEAT-AFFECTED ZONE IN EXPLOSION WELDING

2020 ◽  
pp. 5-9
Author(s):  
S. V. Khaustov ◽  
V. V. Pai ◽  
Ya. L. Lukyanov ◽  
S. V. Kuz’min ◽  
V. I. Lysak ◽  
...  
Keyword(s):  
Heat Release ◽  
Temperature Measurement ◽  
Heat Affected Zone ◽  
Experimental Methods ◽  
Explosion Welding ◽  
Wave Formation ◽  
Narrow Region

This paper presents the results of measuring the temperature at the joint boundary and in the heat-affected zone using the developed computational and experimental methods based on the use of natural thermocouples. It is shown that in explosion welding of materials with developed wave formation at the joint boundary, the main heat release occurs in a narrow region limited by the size of the generated waves.

Numerical and experimental simulation of wave formation during explosion welding

2013 ◽  
Vol 281 (1) ◽  
pp. 12-26 ◽  
Author(s):  
S. K. Godunov ◽  
S. P. Kiselev ◽  
I. M. Kulikov ◽  
V. I. Mali
Keyword(s):  
Explosion Welding ◽  
Wave Formation ◽  
Experimental Simulation

scholarly journals Sound scattering by free surface piercing and fluid-loaded cylindrical shells

2011 ◽  
Vol 369 (1947) ◽  
pp. 2852-2863 ◽  
Author(s):  
Eldad J. Avital ◽  
Touvia Miloh
Keyword(s):  
Shallow Water ◽  
Applied Pressure ◽  
Continuous Distribution ◽  
Discrete Distribution ◽  
Rigid Base ◽  
Homogeneous Material ◽  
Thin Cylindrical Shell ◽  
Zero Sound ◽  
Sound Scattering ◽  
Pressure Load

A vertical flexible, thin, cylindrical shell is considered to be clamped to a rigid base in shallow water and piercing its surface. The shell is composed of an isotropic and homogeneous material and may be empty inside or filled with compressible fluid. Linear acoustics and structural dynamics are used to model sound scattering caused by an external incident sound wave. A solution is derived using a Fourier transform in the tangential and vertical directions. A collocation technique coupled with an orthogonalization procedure is used to account for the edge conditions of the shell. It is shown that zero sound scattering, indicating acoustic invisibility, is theoretically attainable and can be achieved when a continuous distribution of an oscillating pressure load is applied on the shell’s wall. Similarly, zero sound transmission into the shell’s inner fluid can also be considered. The possibility of using a pre-determined discrete distribution of the applied pressure load is also discussed. The derived equations are numerically solved to examine sound scattering by a thin aluminium shell in shallow water.

Effect of the initial temperature on the process of jet and wave formation with explosion welding

1979 ◽  
Vol 15 (3) ◽  
pp. 410-414 ◽  
Author(s):  
�. O. Mindeli ◽  
V. G. Kabulashvili ◽  
T. G. Mardaleishvili ◽  
�. Sh. Chagelishvili
Keyword(s):  
Initial Temperature ◽  
Explosion Welding ◽  
Wave Formation

scholarly journals STRUCTURAL FORMATION OF INTERLAYER BOUNDARIES LAYERED METAL MATERIAL IN EXPLOSION WELDING

2020 ◽  
pp. 41-45
Author(s):  
A. E. Rosen ◽  
A. E. Korneev ◽  
A. V. Horin ◽  
A. V. Pryshchak ◽  
A. S. Gudenko ◽  
...  
Keyword(s):  
Structure Formation ◽  
Transition Zone ◽  
Explosion Welding ◽  
Wave Formation ◽  
Optimal Parameters ◽  
Structural Formation ◽  
Metal Material ◽  
Metal Materials

The paper presents the results of studies of interlayer boundaries of laminated metal materials with an inner protector during explosion welding. The calculation of the optimal parameters of explosion welding and their influence on wave formation in the interlayer boundaries is carried out. The structure formation of the transition zone of the interlayer boundary has been studied.

Effect of the grain size on the start of the process of wave formation with explosion welding

1976 ◽  
Vol 12 (5) ◽  
pp. 712-715
Author(s):  
M. P. Bondar' ◽  
A. A. Deribas ◽  
V. I. Mali ◽  
V. A. Simonov
Keyword(s):  
Grain Size ◽  
Explosion Welding ◽  
Wave Formation

Applications of Photoelectron Microscopy

1976 ◽  
Vol 34 ◽  
pp. 506-507
Author(s):  
William J. Baxter
Keyword(s):  
Electron Microscopy ◽  
Thermal Decomposition ◽  
Chemical Composition ◽  
Ultraviolet Radiation ◽  
Thin Layer ◽  
Edge Effects ◽  
Electron Optics ◽  
Surface Layers ◽  
Crystalline Orientation ◽  
Fluorescent Screen

In this form of electron microscopy, photoelectrons emitted from a metal by ultraviolet radiation are accelerated and imaged onto a fluorescent screen by conventional electron optics. image contrast is determined by spatial variations in the intensity of the photoemission. The dominant source of contrast is due to changes in the photoelectric work function, between surfaces of different crystalline orientation, or different chemical composition. Topographical variations produce a relatively weak contrast due to shadowing and edge effects.Since the photoelectrons originate from the surface layers (e.g. ∼5-10 nm for metals), photoelectron microscopy is surface sensitive. Thus to see the microstructure of a metal the thin layer (∼3 nm) of surface oxide must be removed, either by ion bombardment or by thermal decomposition in the vacuum of the microscope.

Ion thinning of integrated circuit transverse specimens for transmission electron microscopy

1992 ◽  
Vol 50 (2) ◽  
pp. 1426-1427
Author(s):  
F. Shaapur
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Integrated Circuit ◽  
Substrate Surface ◽  
Homogeneous Material ◽  
Material System ◽  
Ion Milling ◽  
Cross Sectional ◽  
Transmission Electron ◽  
Motion Profile

Non-uniform ion-thinning of heterogenous material structures has constituted a fundamental difficulty in preparation of specimens for transmission electron microscopy (TEM). A variety of corrective procedures have been developed and reported for reducing or eliminating the effect. Some of these techniques are applicable to any non-homogeneous material system and others only to unidirectionalfy heterogeneous samples. Recently, a procedure of the latter type has been developed which is mainly based on a new motion profile for the specimen rotation during ion-milling. This motion profile consists of reversing partial revolutions (RPR) within a fixed sector which is centered around a direction perpendicular to the specimen heterogeneity axis. The ion-milling results obtained through this technique, as studied on a number of thin film cross-sectional TEM (XTEM) specimens, have proved to be superior to those produced via other procedures.XTEM specimens from integrated circuit (IC) devices essentially form a complex unidirectional nonhomogeneous structure. The presence of a variety of mostly lateral features at different levels along the substrate surface (consisting of conductors, semiconductors, and insulators) generally cause non-uniform results if ion-thinned conventionally.

Sign in / Sign up

Export Citation Format

Share Document