Laser Peening with Solid-State Medium Having High Acoustic Impedance as Plasma Confinement Layer

The influence of defects in solid-state dielectric samples on the parameters of the electromagnetic response under deterministic acoustic influence on the control object is shown. The regularities of changes in the parameters of electromagnetic signals with variations and increases in the electric field strength vector relative to the contact of the sample materials and the defect are presented. It is shown that the amplitude-frequency parameters of the emitted electromagnetic signals are directly related to the acoustic impedance and conductivity of the contacting medium and the defect. The amplitudes of electromagnetic responses correspond to the distribution in time and space determined by mathematical modeling of mechanical stresses that occur in a defective system during the propagation of an acoustic pulse. Data on changes in the parameters of electromagnetic signals with an increase in the size of model defects in similar samples are presented.

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Effects of Laser Peening Parameters on Plastic Deformation in Aqueous Glycerol Solution as Plasma Confinement Layer

Journal of Laser Micro/Nanoengineering ◽

10.2961/jlmn.2021.03.2002 ◽

2021 ◽

Keyword(s):

Plastic Deformation ◽

Glycerol Solution ◽

Laser Peening ◽

Plasma Confinement

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Laser Peening of Metals - Enabling Laser Technology

MRS Proceedings ◽

10.1557/proc-499-73 ◽

1997 ◽

Vol 499 ◽

Cited By ~ 4

Author(s):

C. Brent Dane ◽

Lloyd A. Hackel

Keyword(s):

Solid State ◽

Residual Stresses ◽

Surface Treatment ◽

High Throughput ◽

Shot Peening ◽

Phase Conjugation ◽

Solid State Laser ◽

Laser Peening ◽

Laser Technology ◽

Compressive Residual Stresses

ABSTRACTLaser shot peening, a surface treatment for metals, is shown to induce compressive residual stresses of over 0.040 inch to provide improved resistance to vairous forms of failure. A solid state laser technology employing Nd:glass slabs and phase conjugation enables this process to move into high throughput production processing. Details of the technology are discussed.

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Preparation of Thin Cadmium Telluride Samples for Electron Microscope Studies

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100052754 ◽

1974 ◽

Vol 32 ◽

pp. 548-549

Author(s):

T. J. Magee ◽

J. Peng ◽

J. Bean

Keyword(s):

Electron Microscope ◽

Sulfuric Acid ◽

Solid State ◽

Sample Preparation ◽

Cadmium Telluride ◽

Potassium Dichromate ◽

Optical Components ◽

The Past ◽

Solid State Devices

Cadmium telluride has become increasingly important in a number of technological applications, particularly in the area of laser-optical components and solid state devices, Microstructural characterizations of the material have in the past been somewhat limited because of the lack of suitable sample preparation and thinning techniques. Utilizing a modified jet thinning apparatus and a potassium dichromate-sulfuric acid thinning solution, a procedure has now been developed for obtaining thin contamination-free samples for TEM examination.

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The Collagenic Molecular Structural Unit of Solid State Complexes

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100066449 ◽

1971 ◽

Vol 29 ◽

pp. 478-479

Author(s):

Kenneth M. Richter ◽

John A. Schilling

Keyword(s):

Molecular Weight ◽

Solid State ◽

Structural Unit ◽

X Ray Diffraction ◽

X Ray ◽

Naoh Treatment

The structural unit of solid state collagen complexes has been reported by Porter and Vanamee via EM and by Cowan, North and Randall via x-ray diffraction to be an ellipsoidal unit of 210-270 A. length by 50-100 A. diameter. It subsequently was independently demonstrated by us in dog tendon, dermis, and induced complexes. Its detailed morphologic, dimensional and molecular weight (MW) aspects have now been determined. It is pear-shaped in long profile with m diameters of 57 and 108 A. and m length of 263 A. (Fig. 1, tendon, KMnO4 fixation, Na-tungstate; Fig. 2a, schematic of unit in long, C, and x-sectional profiles of its thin, xB, and bulbous, xA portions; Fig. 2b, tendon essentially unmodified by ether and 0.4 N NaOH treatment, Na-tungstate). The unit consists of a uniquely coild cable, c, of ṁ 22.9 A. diameter and length of 2580-3316 A. The cable consists of three 2nd-strands, s, each of m 10.6 A.

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Structure-property relations of liquid crystalline polymers

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100127013 ◽

1987 ◽

Vol 45 ◽

pp. 460-463

Author(s):

Linda C. Sawyer

Keyword(s):

Solid State ◽

Liquid Crystalline ◽

Structural Model ◽

Crystalline Polymer ◽

Liquid Crystalline Polymers ◽

Mechanical Anisotropy ◽

Structure Property ◽

Preparation Methods ◽

Crystalline Polymers ◽

Extended Chain

Recent liquid crystalline polymer (LCP) research has sought to define structure-property relationships of these complex new materials. The two major types of LCPs, thermotropic and lyotropic LCPs, both exhibit effects of process history on the microstructure frozen into the solid state. The high mechanical anisotropy of the molecules favors formation of complex structures. Microscopy has been used to develop an understanding of these microstructures and to describe them in a fundamental structural model. Preparation methods used include microtomy, etching, fracture and sonication for study by optical and electron microscopy techniques, which have been described for polymers. The model accounts for the macrostructures and microstructures observed in highly oriented fibers and films.Rod-like liquid crystalline polymers produce oriented materials because they have extended chain structures in the solid state. These polymers have found application as high modulus fibers and films with unique properties due to the formation of ordered solutions (lyotropic) or melts (thermotropic) which transform easily into highly oriented, extended chain structures in the solid state.

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