Luminescence of metals excited by fast nondestructive loading

Абрамова, К. Б.; Rusakov, A.I.; Semenov, A. A.; Щербаков, И. П.

doi:10.1134/1.1130467

Cited by 5 publications

(8 citation statements)

References 12 publications

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“…It is known that the concentration of defects is largest at grain boundaries. Therefore, when grain size changes, defects undergo redistribution in the bulk of the sample, which means that some of the defects are set in motion during laser irradiation . The mechanism proposed to account for the ML in metals is as follows. During the course of fracture, plastic zones with a high dislocation density form at the crack tip.…”

Section: Mechanistic Aspects Of Laser Induced ML In Metalsmentioning

confidence: 99%

“…The significance of this study is as follows: The paper reports the laser power dependence of the ML intensity in metals for the first time. Because the magnitude of laser pulses can be changed from low to high, and the time duration can be varied from nanoseconds to a longer duration, the laser‐induced shock wave should be more suitable for studying ML and have significant potential for providing a wealth information about the ML of metals. The effect of laser power density on temperature and thermal stress in the sample are reported. Good agreement is found between the experimental and mathematical results. Laser‐induced ML in metals may be useful as a potential tool for probing the surface states of metals and the kinetics of emergence of mobile dislocations on the surface with high time resolutions . …”

Section: Introductionmentioning

confidence: 95%

“…Subsequently, laser pulse‐induced ML has been studied for different metals such as copper, gold, silver, platinum, tungsten and molybdenum . Abramova et al reported the luminescence excited on the back side of metal targets irradiated with laser pulses of energy substantially below the plasma‐flare formation threshold, and calculated the temporal and spatial distributions of temperature, thermal stresses and rate of thermal–stress variation in a sample. They compared the evolution of the luminescence pulse with that of the laser pulse, sample temperature, thermal stresses and rate of thermal–stress variation.…”

Section: Introductionmentioning

confidence: 99%

“…Mechanoluminescence (ML) is an interesting luminescence phenomenon, whereby light emission in solids is caused by mechanical stimuli such as grinding, rubbing, cutting, cleaving, shaking, scratching, compressing, loading, crushing and impulsive deformation (1,2). Researchers have attempted to check the affordability of laser pulses as a source of mechanical energy (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14). Because a laser-induced shock wave is associated with a mechanical factor, namely pressure (15), its exposure on metal should stimulate ML.…”

Section: Introductionmentioning

confidence: 99%

“…(3) used a pulsed Nd:YAG laser as a source of mechanical energy for the first time to study the tribo-ML, popularly called triboluminescence, of crystalline materials. Subsequently, laser pulse-induced ML has been studied for different metals such as copper, gold, silver, platinum, tungsten and molybdenum (4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14). Abramova et al (4)(5)(6) reported the luminescence excited on the back side of metal targets irradiated with laser pulses of energy substantially below the plasma-flare formation threshold, and calculated the temporal and spatial distributions of temperature, thermal stresses and rate of thermal-stress variation in a sample.…”

Section: Introductionmentioning

confidence: 99%

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Laser power dependence of mechanoluminescence in metals

2016

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Mechanoluminescence (ML) glow is produced on the back side when the front of a metal sample is irradiated with infrared Nd:YAG laser pulses. An incident laser beam with a power density below the plasma-flare onset threshold causes a rise in temperature in the studied metal. As the incident laser power density increases, the intensity of the ML glow signal also increases. On the basis of the laser power density-induced temperature, an expression is derived for the temperature-induced thermal stress. An expression is derived for the correlation between thermal stress and laser power density, which indicates that the temperature-induced thermal stress is directly related to the incident laser power density. In the region of plastic deformation, temperature-induced thermal stress is related to the strain and, consequently, to the emitted ML intensity. Finally, an expression is derived for the laser power dependence of the ML intensity, and good agreement is found between the theoretical and experimental results. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Mechanistic Aspects Of Laser Induced ML In Metalsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Laser power dependence of mechanoluminescence in metals

2016

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Survey of the literature on mechanoluminescence from 1605 to 2013

2014

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Mechanoluminescence (ML) is a type of luminescence induced by any mechanical action on solids. The light emissions induced by elastic deformation, plastic deformation and fracture of solids are called elastico ML (EML), plastico ML (PML) and fracto ML (FML), respectively. Whereas nearly 50% of all organic molecular solids and inorganic salts exhibit FML, only a few solids exhibit EML and PML. The EML and FML of certain solids are so intense that they can be seen during daylight with the naked eye. Mechanolumnescence has a great potential for use in different types of mechano-optical devices such as stress sensors, damage sensors, impact sensors, fracture sensors and safety management monitoring systems. This article reports a survey of the literature from 1605 to 2013. Mechanoluminescence is studied by physicists, chemists, material scientists, geologists, medical scientists, engineers and technologists, among others and researchers will certainly benefit from the literature survey on ML given here. In addition, the field of mechanoluminescence may attract the interest of many new researchers.

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