Optical measurements of the deformation behavior of thin metallized viscoelastic layers for light valves

2007 ◽  
pp. 63-68 ◽  
Author(s):  
R. Gerhard-Multhaupt ◽  
W. Brinker ◽  
R. Tepe
Keyword(s):  
Deformation Behavior ◽  
Optical Measurements ◽  
Viscoelastic Layers

Deformation Behavior Of Thin Viscoelastic Layers Used In An Active-Matrix-Addressed Spatial Light Modulator

1989 ◽  
Author(s):  
W. Brinker ◽  
R. Gerhard-Multhaupt ◽  
W.-D. Molzow ◽  
R. Tepe
Keyword(s):  
Deformation Behavior ◽  
Spatial Light Modulator ◽  
Light Modulator ◽  
Active Matrix ◽  
Viscoelastic Layers

Plastic deformation of θ ' in Al-4%Cu alloy

1978 ◽  
Vol 36 (1) ◽  
pp. 576-577
Author(s):  
Shrikant P. Bhat
Keyword(s):  
Deformation Behavior ◽  
Room Temperature ◽  
Electron Microscopic Observation ◽  
Bulk Alloy ◽  
Electron Microscopic ◽  
Cu Alloy ◽  
Cu Alloys ◽  
Orowan Mechanism ◽  
The Subject ◽  
Cyclic Straining

deformation behavior of Al-Cu alloys aged to contain θ ' has been the subject of many investigations (e.g., Ref. 1-5). Since θ ' is strong and hard, dislocations bypass θ ' plates (Orowan mechanism) at low strains. However, at high strains the partially coherent θ ' plates are probably sheared, although the mechanism is complex, depending on the form of deformation. Particularly, the cyclic straining of the bulk alloy is known to produce gross bends and twists of θ '. However, no detailed investigation of the deformation of θ ' has yet been reported; moreover, Calabrese and Laird interpreted the deformation of θ ' as largely being elastic.During an investigation of high temperature cyclic deformation, the detailed electron-microscopic observation revealed that, under reversed straining conditions, θ ' particles are severely distorted--bent and twisted depending on the local matrix constraint. A typical electronmicrograph, showing the twist is shown in Fig. 1. In order to establish whether the deformation is elastic or plastic, a sample from a specimen cycled at room temperature was heated inside the microscope and the results are presented in a series of micrographs (Fig. 2a-e).

Observation of secondary slip systems in tungsten bicrystals

1984 ◽  
Vol 42 ◽  
pp. 478-479
Author(s):  
J. R. Fekete ◽  
R. Gibala
Keyword(s):  
Stress Field ◽  
Grain Boundaries ◽  
Deformation Behavior ◽  
Stress Axis ◽  
Polycrystalline Materials ◽  
Slip Systems ◽  
Metallic Materials ◽  
Twist Boundary ◽  
Secondary Slip ◽  
Plane Normal

The deformation behavior of metallic materials is modified by the presence of grain boundaries. When polycrystalline materials are deformed, additional stresses over and above those externally imposed on the material are induced. These stresses result from the constraint of the grain boundaries on the deformation of incompatible grains. This incompatibility can be elastic or plastic in nature. One of the mechanisms by which these stresses can be relieved is the activation of secondary slip systems. Secondary slip systems have been shown to relieve elastic and plastic compatibility stresses. The deformation of tungsten bicrystals is interesting, due to the elastic isotropy of the material, which implies that the entire compatibility stress field will exist due to plastic incompatibility. The work described here shows TEM observations of the activation of secondary slip in tungsten bicrystals with a [110] twist boundary oriented with the plane normal parallel to the stress axis.

TEM characterization of proton-exchanged LiNbO3 optical waveguides

1986 ◽  
Vol 44 ◽  
pp. 480-481
Author(s):  
W. E. Lee
Keyword(s):  
Refractive Index ◽  
Benzoic Acid ◽  
Optical Waveguides ◽  
Total Internal Reflection ◽  
Index Of Refraction ◽  
Optical Measurements ◽  
Lithium Ions ◽  
Wide Channel ◽  
Tem Characterization

An optical waveguide consists of a several-micron wide channel with a slightly different index of refraction than the host substrate; light can be trapped in the channel by total internal reflection.Optical waveguides can be formed from single-crystal LiNbO3 using the proton exhange technique. In this technique, polished specimens are masked with polycrystal1ine chromium in such a way as to leave 3-13 μm wide channels. These are held in benzoic acid at 249°C for 5 minutes allowing protons to exchange for lithium ions within the channels causing an increase in the refractive index of the channel and creating the waveguide. Unfortunately, optical measurements often reveal a loss in waveguiding ability up to several weeks after exchange.

Transformation and Deformation Behavior in Sputter-Deposited Ti-Ni-Cu Thin Films

1995 ◽  
Vol 05 (C8) ◽  
pp. C8-689-C8-694 ◽  
Author(s):  
T. Hashinaga ◽  
S. Miyazaki ◽  
T. Ueki ◽  
H. Horikawa
Keyword(s):  
Thin Films ◽  
Deformation Behavior ◽  
Sputter Deposited

Deformation behavior of ultra high-purity Fe-50 MASS %Cr alloyed with tungsten

2003 ◽  
Vol 91 ◽  
pp. 81-85
Author(s):  
S. Isozaki ◽  
T. Takemoto ◽  
K. Abiko
Keyword(s):  
High Purity ◽  
Deformation Behavior ◽  
Ultra High Purity

Load Deformation Behavior of Drilled Shafts in Residual Soil

2010 ◽  
Author(s):  
H. Sarhan
Keyword(s):  
Deformation Behavior ◽  
Drilled Shafts ◽  
Residual Soil

ffect of Temperature on Deformation Behavior and Fracture of the Composites Based on Polyethylene

INEOS OPEN ◽  
2020 ◽  
Vol 3 ◽  
Author(s):  
O. A. Serenko ◽  
◽  
A. V. Efimov ◽  
Keyword(s):  
Deformation Behavior

A Study on Extrusion Deformation Behavior of ZAM631 Magnesium Alloy Using the Rigid Plastic Finite Element Method

2015 ◽  
Vol 53 (8) ◽  
pp. 569-577 ◽  
Author(s):  
Kwang Shin ◽  
Ki Soon Choi ◽  
Ji Hoon Hwang ◽  
Kyunghoon Lee
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Magnesium Alloy ◽  
Deformation Behavior ◽  
Rigid Plastic ◽  
Element Method
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