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Microstructure,Corrosion and Mechanical Properties of Medium-Thick 6061-T6 Alloy/T2 Pure Cu Dissimilar Joints Produced by Double Side Friction Stir Z Shape Lap-Butt Welding

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Chinese Journal of Mechanical Engineering 2024年第2期37卷 385-400页

作者： Jiuxing Tang Guoxin Dai Lei Shi Chuansong Wu sergey mironov Surendra Kumar Patel Song Gao Mingxiao Wu MOE Key Lab for Liquid-Solid Structure Evolution and Materials Processing Shandong UniversityJinan 250061China Laboratory of Mechanical Properties of Nanoscale Materials and Superalloys Belgorod State UniversityBelgorod 308015Russia School of Mechanical Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China State Grid Henan Electric Power Research Institute Zhengzhou 450052China

A novel double side friction stir Z shape lap-butt welding(DS-FSZW)process was proposed to achieve excellent mechanical properties of Al/Cu medium-thick dissimilar *** influence of welding parameters on weld microstructure and properties of DS-FSZW joint were systematically *** indicated that defect-free medium-thick Al/Cu DS-FSZW joint could be achieved under an optimal welding ***-FSZW joint was prone to form void defects in the bottom of the second-pass *** recrystallization mechanisms at the top and middle of the weld nugget zone(WNZ)were continuous dynamic recrystallization(CDRX)and geometric dynamic recrystallization(GDRX).While the major recrystallization mechanism at the bottom of the WNZ was ***-FSZW joint of the optimal welding condition with 850 r/min-400 mm/min was produced with a continuous thin and crack-free IMCs layer at the Al/Cu interface,and the maximum tensile strength of this joint is 160.57 MPa,which is equivalent to 65.54%of pure Cu base ***,the corrosion resistance of Al/Cu DS-FSZW joints also achieved its maximum value at the optimal welding parameter of 850 r/min-400 mm/*** demonstrates that the DS-FSZW process can simultaneously produce medium-thick Al/Cu joints with excellent mechanical performance and corrosion resistance.

关键词： DS-FSZW Al/Cu dissimilar joint Corrosion behaviour Intermetallic compounds Microstructure Mechanical properties

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Reformulation of Relativistic Quantum Mechanics Equations with Non-Commutative Sedeons

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Applied Mathematics 2013年第10期4卷 53-60页

作者： Victor L. mironov sergey V. mironov Institute for Physics of Microstructures of the Russian Academy of Sciences Nizhniy Novgorod Russia

We present sixteen-component values “sedeons”, generating associative non-commutative space-time algebra. The generalized relativistic wave equations based on sedeonic wave function and space-time operators are proposed. We demonstrate that sedeonic second-order wave equation for massive field can be reformulated as the quasi-classical equation for the potentials of the field or in equivalent form as the Maxwell-like equations for the field intensities. The sedeonic first-order Dirac-like equations for massive and massless fields are also discussed.

关键词： Clifford Algebra Sedeons Relativistic Quantum Mechanics Sedeonic Klein-Gordon and Dirac Equations

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Associative Space-Time Sedenions and Their Application in Relativistic Quantum Mechanics and Field Theory

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Applied Mathematics 2015年第1期6卷 46-56页

作者： Victor L. mironov sergey V. mironov Institute for Physics of Microstructures RAS Nizhny Novgorod Russia Lobachevsky State University of Nizhny Novgorod Nizhny Novgorod Russia

We present an alternative sixteen-component hypercomplex scalar-vector values named “space-time sedenions”, generating associative noncommutative space-time Clifford algebra. The generalization of relativistic quant... 详细信息

关键词： Clifford Algebra Space-Time Sedenions Relativistic Quantum Mechanics Sedenionic Klein-Gordon Equation Sedenionic Dirac Equation Sedenionic Maxwell Equiations

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Sedeonic Equations of Gravitoelectromagnetism

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Journal of Modern Physics 2014年第10期5卷 917-927页

作者： Victor L. mironov sergey V. mironov 1Institute for Physics of Microstructures RAS Nizhniy Novgorod Russia 2Lobachevsky State University of Nizhniy Novgorod Nizhniy Novgorod Russia Institute for Physics of Microstructures RAS Nizhniy Novgorod Russia

In present paper we develop the description of massless fields on the basis of space-time algebra of sixteen-component sedeons. The generalized sedeonic second-order equation for unified gravito-electromagnetic (GE) field describing simultaneously weak gravity and electromagnetism is proposed. The relations for the GE field energy, momentum and Lorentz invariants are derived. The special case of GE field described by first-order sedeonic wave equation is also discussed.

关键词： Gravitoelectromagnetism Clifford Algebra Space-Time Sedeons

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Use of KDP crystal as a Kerr nonlinear medium for compressing PW laser pulses down to 10 fs

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High Power Laser Science and Engineering 2021年第4期9卷 86-92页

作者： Andrey Shaykin Vladislav Ginzburg Ivan Yakovlev Anton Kochetkov Alexey Kuzmin sergey mironov Ilya Shaikin sergey Stukachev Vladimir Lozhkarev Artem Prokhorov Efim Khazanov Institute of Applied Physics of the Russian Academy of Sciences Nizhny Novgorod 603950Russia

The input pulse of the laser PEARL with energy of 18 J and pulse duration of about 60 fs was compressed to 10 fs after passage through a 4-mm-thick KDP crystal and reflection at two chirped mirrors with sum dispersion of-200 fs^(2).The experiments were performed for the B-integral values from 5 to 19 without visible damage to the optical elements,which indicates that small-scale self-focusing is not a significant *** was shown that,by virtue of the low dispersion of the group velocity,the KDP crystal has some advantages over silica:a larger pulse compression coefficient,especially at a small value of the B-integral(B=5,...,9),lower absolute values of chirped mirror dispersion,and also a possibility to control the magnitude of nonlinearity and dispersion by changing crystal orientation.

关键词： CafCA petawatt lasers post-compression self-phase modulation small-scale self-focusing thin film compression third-order nonlinearity

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Suppressing small-scale self-focusing of high-power femtosecond pulses

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High Power Laser Science and Engineering 2023年第2期11卷 103-109页

作者： Mikhail Martyanov Vladislav Ginzburg Alexey Balakin sergey Skobelev Dmitry Silin Anton Kochetkov Ivan Yakovlev Alexey Kuzmin sergey mironov Ilya Shaikin sergey Stukachev Andrey Shaykin Efim Khazanov Alexander Litvak Institute of Applied Physics of the Russian Academy of Sciences Nizhny NovgorodRussia

It was shown experimentally that for a 65-fs 17-J pulse,the effect of filamentation instability,also known as small-scale self-focusing,is much weaker than that predicted by stationary and nonstationary theoretical models for high B-integral *** this discrepancy has been left unexplained at the moment,in practice no signs of filamentation may allow a breakthrough in nonlinear pulse post-compression at high laser energy.

关键词： B-integral cubic Kerr nonlinearity filamentation instability high-power femtosecond laser nonlinear post-compression

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Fiber laser with random-access pulse train profiling for a photoinjector driver

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Photonics Research 2017年第4期5卷 293-298页

作者： EKATERINA I.GACHEVA ANATOLY K.POTEOMKIN sergey YU.mironov VIKTOR V.ZELENOGORSKII EFIM A.KHAZANOV KONSTANTIN B.YUSHKOV ALEXANDER I.CHIZHIKOV VLADIMIR YA.MOLCHANOV Institute of Applied Physics of the Russian Academy of Sciences (IAP RAS) National University of Science and Technology "MISIS "

We report on the design and performance of a fiber laser system with adaptive acousto-optic macropulse control for a novel photocathode laser driver with 3D ellipsoidal pulse shaping. The laser system incorporates a threestage fiber amplifier with an integrated acousto-optical modulator. A digital electronic control system with feedback combines the functions of the arbitrary micropulse selection and modulation resulting in macropulse envelope profiling. As a benefit, a narrow temporal transparency window of the modulator, comparable to a laser pulse repetition period, effectively improves temporal contrast. In experiments, we demonstrated rectangular laser pulse train profiling at the output of a three-cascade Yb-doped fiber amplifier.

关键词： AOM Fiber laser with random-access pulse train profiling for a photoinjector driver

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eXawatt Center for Extreme Light Studies

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High Power Laser Science and Engineering 2023年第6期11卷 101-129页

作者： Efim Khazanov Andrey Shaykin Igor Kostyukov Vladislav Ginzburg Ivan Mukhin Ivan Yakovlev Alexander Soloviev Ivan Kuznetsov sergey mironov Artem Korzhimanov Denis Bulanov Ilya Shaikin Anton Kochetkov Alexey Kuzmin Mikhail Martyanov Vladimir Lozhkarev Mikhail Starodubtsev Alexander Litvak Alexander Sergeev Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences Nizhny Novgorod 603950Russia

The eXawatt Center for Extreme Light Studies project aimed to create a large scientific infrastructure based on lasers with giant peak *** project relies on the significant progress achieved in the last *** planned infrastructure will incorporate a unique light source with a pulse power of 600 PW using optical parametric chirped pulse amplification in large-aperture KD_(2)PO_(4),deuterated potassium dihydrogen phosphate *** interaction of such laser radiation with matter represents a completely new fundamental *** direct study of the space-time structure of vacuums and other unknown phenomena at the frontier of high-energy physics and the physics of superstrong fields will be *** applications will include the development of compact particle accelerators,the generation of ultrashort pulses of hard X-ray and gamma radiation for material science enabling one to probe material samples with unprecedented spatial and temporal resolution,the development of new radiation and particle sources,*** paper is translation from Russian[Kvantovaya Elektronika 53,95(2023)].

关键词： high-power femtosecond lasers interaction of ultrarelativistic field with matter

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Radiation of a TM mode from an open end of a three-layer dielectric capillary

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Chinese Physics B 2024年第7期33卷 311-318页

作者： sergey NGalyamin Alexandr MAltmark St.Petersburg State University 7/9Universitetskayanab.St.Petersburg 199034Russia St.Petersburg Electrotechnical University“LETI” 5ProfessoraPopovaSt.Petersburg 197022Russia

Modern trends in beam-driven radiation sources include the interaction of Cherenkov wakefields in open-ended circular waveguides with complicated dielectric linings, with a three-layer dielectric capillary recently proposed to reduce radiation divergence being a representative example [Opt. Lett. 45 5416(2020)]. We present a rigorous approach that allows for an analytical description of the electromagnetic processes that occur when the structure is excited by a single waveguide TM mode. In other words, the corresponding canonical waveguide diffraction problem is solved in a rigorous formulation. This is a continuation of our previous papers which considered simpler cases with a homogeneous or two-layer dielectric filling. Here we use the same analytical approach based on the Wiener–Hopf–Fock technique and deal with the more complicated case of a three-layer dielectric lining. Using the obtained rigorous solution, we discuss the possibility of manipulating the far-field radiation pattern using a third layer made of a low permittivity material.

关键词： diffraction radiation open-ended waveguide Wiener–Hopf technique Cherenkov radiation

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Pyrrole and Pyrimidine Derivatives as Possible Electron Donors for Colored Charge-Transfer Complexes with a Weakly Electrophilic Energetic Material,FOX-7:A Theoretical Study

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火炸药学报 2023年第5期46卷 390-398,I0002-I0008页

作者： sergey V.Bondarchuk Department of Chemistry and Nanomaterials Science Bogdan Khmelnitsky Cherkasy National Universityblvd.Shevchenko 8118031 CherkasyUkraine

A number of electron-rich heterocycles are studied as potential reagents for visual colorimetric detection of FOX-7 due to colored charge-transfer complexes *** obtained results suggest that pyrrole and pyrimidine derivatives can form such complexes playing the role of electron donors despite a low electrophilicity of *** functional theory calculations,as well as quantum theory of atoms in molecules analysis,suggest stacking binding mode as the most preferable one with the binding energy of about 21-36 kJ/*** the complexes demonstrate a clear single charge-transfer absorption band in the visible region and the expected colors of the complexes are varying from violet and blue to red and *** calculations of the crystalline state of the studied complexes indicate high lattice energies,which are higher than that of pure FOX-7 and are close to the recently reported hydrogen-bonded complex of FOX-7 with 1,*** analysis of the studied charge-transfer complexes using properties based on density difference grids clearly suggests the acceptor role of FOX-7 in the *** analysis can be effectively applied to identify the nature of other possible complexes of FOX-7,in which its role is unclear because of the specific reactivity,namely,both weak electrophilic and nucleophilic properties at the same time.

关键词： FOX-7 charge-transfer colorimetric analysis detection of explosives quantum-chemical calculation

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