Mass Transfer by Laser-Generated Dislocations

Pogorelov, A. E.; Журавлев, А. Ф.

doi:10.4028/www.scientific.net/ddf.194-199.1247

Cited by 5 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Calculations in [5] and experimental data in [24] show that temperature influence of the laser beam during nano-second reaches the depths in order of µm. As a result the concentration of the vacancies in the near-to-surface layers are much than the concentration of the interstitials and vise versa in deepest layers [4] .…”

Section: Calculations and Estimationsmentioning

confidence: 99%

“…As a result, effective forces, which appears due to the action of the inhomogeneous thermal-elastic stresses, cause the displacements of the part of dislocation or whole piled up dislocation group, which, in turn cause the plastic deformation of the near-to-surface areas of the laser-influenced metal. The transmission electronic microscopy data show [7], that the formation of the cellular structure is the result of the creation, accumulation, A motion of the dislocations and its interactions also cause the generation of point defects [4]. A type of generated defect, namely, a vacancy or an interstitial atom, depends on as the dislocation interaction mechanism [14], [15], as the deformation velocity [16].…”

Section: Basic Relationsmentioning

confidence: 99%

“…were performed in the work [4], show the dynamical state of the laser-influenced metal. This state is stipulated by the moving of the gradients of thermal rapidchanged stresses from the skin layer into the bulk of the metal.…”

Section: Introductionmentioning

confidence: 99%

“…This mechanism cannot interpret observed experimentally long-range mass transfer, because the interstitial atoms are short-live defects, which quickly eliminated on sinks. To escape this problem the authors of the work [4] supposed interstitial atom dragging by the dislocations, which were moving by the thermal stresses. In this case lifetime of the complex "dislocation+interstitial atom" was sufficient for right estimations of the penetration depth.…”

Section: Introductionmentioning

confidence: 99%

“…Dislocation structure analysis, which was performed with the data presented in the work [8], has evidenced the possibility of generating large amount of point defects of interstitial type under these conditions. Model calculations, which were performed in the work [4], show the dynamical state of the laser-influenced metal. This state is stipulated by the moving of the gradients of thermal rapidchanged stresses from the skin layer into the bulk of the metal.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Mass transfer mechanism in real crystals by pulsed laser irradiation

Pogorelov

Ryaboshapka

Zhuravlyov

2002

Journal of Applied Physics

View full text Add to dashboard Cite

The dynamic processes in the surface layers of metals subjected activity of a pulsing laser irradiation, which destroyed not the crystalline structure in details surveyed. The procedure of calculation of a dislocation density generated in bulk of metal during the relaxation processes and at repeated pulse laser action is presented. The results of evaluations coincide with high accuracy with transmission electron microscopy dates. The dislocationinterstitial mechanism of laser-stimulated mass transfer in real crystals is presented on the basis of the ideas of the interaction of structure defects in dynamically deforming medium. The good compliance of theoretical and experimental results approves a defining role of the presented mechanism of mass transfer at pulse laser action on metals. The possible implementation this dislocation-interstitial mechanism of mass transfer in metals to other cases of pulsing influences is justified 1

show abstract

Section: Calculations and Estimationsmentioning

confidence: 99%

Section: Basic Relationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Mass transfer mechanism in real crystals by pulsed laser irradiation

Pogorelov

Ryaboshapka

Zhuravlyov

2002

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

Optimization of data storage density and data media quality monitoring in film storage thermal recording devices

Pogorelov

Pogoryelov

Zhuravlev

2002

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

Transport Phenomena Induced by the Energy Pulse in a Crystal

Pogorelov¹

2016

Metallofiz. Noveishie Tekhnol.

View full text Add to dashboard Cite

The phenomenon of rapid mass-transfer in solid state observed in metals after pulsed action is characterized by transfer of atoms within the short periods of action time to the depths significantly exceeding the diffusion depth under the conditions of stationary annealing. The features of other transport phenomena (mass-transfer, heat-transfer, etc.) arising in metal at pulsed energy action on a crystal are also discussed. The best instrument to study transformations in the matter under pulsed action is an easily controlled laser pulse. In a given work, the nature and correlations between transport phenomena in metals excited by the energy pulse are studied.Швидкісна деформація металів у твердій фазі призводить до ґенерації і перенесення дефектів кристалічної ґратниці на значні віддалі. В таких умовах атоми проникають на глибини, які істотно перевищують глибину дифузії в умовах стаціонарного відпалу за такі ж самі терміни часу. При-скорене перенесення атомів може також супроводжуватися й іншими явищами перенесення (електро-і теплоперенесення) в металі за умов дії енергетичного імпульсу на кристал. Найкращим джерелом такого імпу-льсу є легкокероване лазерне опромінення. В даній роботі встановлено природу та взаємозв'язок між транспортними явищами в металах, збу-джених енергетичним імпульсом.Скоростная деформация металлов в твёрдой фазе приводит к генерации и переносу дефектов кристаллической решётки на значительные расстоя-ния. В этих условиях атомы проникают на глубины, существенно превы-шающие глубину диффузии в условиях стационарного отжига за сопоста-вимые времена. Ускоренный перенос атомов может также сопровождать-ся и другими явлениями переноса (электро-и теплоперенос) в металле при воздействии энергетического импульса на кристалл. Наилучшим ис-точником такого импульса является легкоуправляемое лазерное излуче-ние. В данной работе установлены природа и взаимосвязь между транс-портными явлениями в металлах, возбуждённых энергетическим им-пульсом. Металлофиз. новейшие технол. / Metallofiz. Noveishie Tekhnol. 2014, т. 36, № 3, сс. 383-389 Оттиски доступны непосредственно от издателя Фотокопирование разрешено только в соответствии с лицензией 2014 ИМФ (Институт металлофизики им. Г. В. Курдюмова НАН Украины) Напечатано в Украине. 384A. E. POGORELOV

show abstract

Mass Transfer by Laser-Generated Dislocations

Cited by 5 publications

References 0 publications

Mass transfer mechanism in real crystals by pulsed laser irradiation

Mass transfer mechanism in real crystals by pulsed laser irradiation

Optimization of data storage density and data media quality monitoring in film storage thermal recording devices

Transport Phenomena Induced by the Energy Pulse in a Crystal

Contact Info

Product

Resources

About