Chemical deposition of nanostructured tungsten and tungsten-alloy coatings from gas phase

2008 ◽  
Vol 44 (4) ◽  
pp. 319-332 ◽  
Author(s):  
Yu. V. Lakhotkin
Keyword(s):  
Gas Phase ◽  
Chemical Deposition ◽  
Tungsten Alloy ◽  
And Tungsten

Laser-induced gas-phase pyrolysis of dimethyl selenium: chemical deposition of selenium and poly(selenoformaldehyde)

2004 ◽  
Vol 71 (2) ◽  
pp. 635-644 ◽  
Author(s):  
Dana Pokorná ◽  
Markéta Urbanová ◽  
Zdeněk Bastl ◽  
Jan Šubrt ◽  
Josef Pola
Keyword(s):  
Gas Phase ◽  
Chemical Deposition

Simulation Analysis of Penetration Performance of Tungsten Alloy and Tungsten Carbide Rod Penetrator

2012 ◽  
Vol 182-183 ◽  
pp. 283-287
Author(s):  
Qun Biao Wu ◽  
Pei Hui Shen ◽  
Rong Zhong Liu
Keyword(s):  
Tungsten Carbide ◽  
Simulation Analysis ◽  
Tungsten Alloy ◽  
Distinct Advantage ◽  
Penetration Mechanics ◽  
Armor Steel ◽  
The One ◽  
The Impact ◽  
Better Than ◽  
And Tungsten

In penetration mechanics, the material parameters of the rod penetrator are very important factors which influence the effect of penetration. The effect of each parameter changes with the impact velocity. Simulation analysis of two models filled with tungsten alloy and tungsten carbide separately penetrating semi-infinite armor steel target at medium to high velocities has been made to quantitatively analyze the key roles that the density and hardness play. Simulation results indicate that a dividing line of velocity exists between the penetrations of two materials. Above the line, tungsten alloy rod with greater density has a distinct advantage with increasing velocity. Below the line, the advantage of tungsten carbide rod with greater hardness is significantly more with the decreasing velocity. In the process of penetration, penetration velocity decreases rapidly from a high value to zero. The simulation result provides quantitative analytic basis which can be used to prove that the penetrator composed of two different materials is better than the one composed of homogenous material.

Chemical deposition of substance from gas phase in nonisothermal channels

2000 ◽  
Vol 43 (20) ◽  
pp. 3877-3882 ◽  
Author(s):  
H.Y. Kim ◽  
H.C. Kim ◽  
V.V. Levdansky ◽  
V.G. Leitsina ◽  
J. Smolik
Keyword(s):  
Gas Phase ◽  
Chemical Deposition

Experimental Analysis of Visco-Plastic Properties of the Aluminium and Tungsten Alloys by Means of Hopkinson Bars Technique

2014 ◽  
Vol 566 ◽  
pp. 110-115 ◽  
Author(s):  
Leopold Kruszka ◽  
Mariusz Magier ◽  
Mariusz Zielenkiewicz
Keyword(s):  
Aluminium Alloy ◽  
Testing Machine ◽  
Construction Materials ◽  
Constitutive Models ◽  
Tungsten Alloy ◽  
Strain Rates ◽  
Dynamic Tests ◽  
Plastic Properties ◽  
Split Hopkinson ◽  
And Tungsten

The main aim of studies on dynamic behaviour of construction materials at high strain rates is to determine the variation of mechanical properties (strength, plasticity) as a function of the strain rate and temperature. On the basis of results of dynamic tests on the properties of constructional materials the constitutive models are formulated to create numerical codes applied to solve constructional problems with computer simulation methods. In the case of military applications connected with the phenomena of gunshot and terminal ballistics it's particularly important to develop a model of strength and armour penetration with KE projectile founded on reliable results of dynamic experiments and constituting the base for further analyses and optimization of projectile designs in order to achieve required penetration depth. Static and dynamic results of strength investigations of the EN AW-7012 aluminium alloy (sabot) and tungsten alloy (penetrator) are discussed in this paper. Static testing was carried out with the INSTRON testing machine. Dynamic tests have been conducted using the split Hopkinson pressure bars technique at strain rates up to 1,2·104 s-1 (for aluminium alloy) and 6·103 s-1 (for tungsten alloy).

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