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Effect of multipass friction stir processing on structure formation, mechanical and tribological properties of CuSn6 copper alloy
IF 0.4 4区 物理与天体物理
Russian Physics Journal Pub Date : 2025-01-14 DOI: 10.1007/s11182-024-03344-5
A. M. Cheremnov, A. V. Chumaevskii, E. O. Knyazhev, E. A. Kolubaev
{"title":"Effect of multipass friction stir processing on structure formation, mechanical and tribological properties of CuSn6 copper alloy","authors":"A. M. Cheremnov,&nbsp;A. V. Chumaevskii,&nbsp;E. O. Knyazhev,&nbsp;E. A. Kolubaev","doi":"10.1007/s11182-024-03344-5","DOIUrl":"10.1007/s11182-024-03344-5","url":null,"abstract":"<div><p>The samples of CuSn6 copper alloy are produced by multipass friction stir processing. Their examination reveals the presence of 5.8–7.6 μm equiaxed grains formed in the stir zone. A decrease in tensile strength and an increase in ductility are observed as a result of material de-hardening in the stir zone after its processing. The coefficients of friction and wear decrease after multi-pass processing.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 11","pages":"2049 - 2055"},"PeriodicalIF":0.4,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143571093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Verification of ERA5 reanalysis data for interpretation of radiosonde measurements in 2009–2023 in western Siberia
IF 0.4 4区 物理与天体物理
Russian Physics Journal Pub Date : 2025-01-14 DOI: 10.1007/s11182-024-03361-4
O. Kuchinskaia, I. Bryukhanov, M. Penzin, E. Ni, I. Samokhvalov, K. Pustovalov
{"title":"Verification of ERA5 reanalysis data for interpretation of radiosonde measurements in 2009–2023 in western Siberia","authors":"O. Kuchinskaia,&nbsp;I. Bryukhanov,&nbsp;M. Penzin,&nbsp;E. Ni,&nbsp;I. Samokhvalov,&nbsp;K. Pustovalov","doi":"10.1007/s11182-024-03361-4","DOIUrl":"10.1007/s11182-024-03361-4","url":null,"abstract":"<div><p>The article presents the joint analysis of vertical profiles obtained from radiosonde observations and the ERA5 data produced by the European Centre of Medium-Range Weather Forecasts. It is shown how accurately the ERA5 data can be used to interpret high-level clouds observations by the polarization-sensitive lidar.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 11","pages":"2169 - 2177"},"PeriodicalIF":0.4,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143571089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ON BRST Lagrangian Formulation of Massless Higher Spin Fields
IF 0.4 4区 物理与天体物理
Russian Physics Journal Pub Date : 2025-01-14 DOI: 10.1007/s11182-024-03317-8
I. L. Buchbinder, S. A. Fedoruk, A. P. Isaev, V. A. Krykhtin
{"title":"ON BRST Lagrangian Formulation of Massless Higher Spin Fields","authors":"I. L. Buchbinder,&nbsp;S. A. Fedoruk,&nbsp;A. P. Isaev,&nbsp;V. A. Krykhtin","doi":"10.1007/s11182-024-03317-8","DOIUrl":"10.1007/s11182-024-03317-8","url":null,"abstract":"<div><p>The paper is dedicated to the blessed memory of Professor Vladislav Gavrilovich Bagrov, an outstanding Russian scientist in theoretical and mathematical physics. He had a great influence on the formation of scientific interests of dozens of scientists in Tomsk and Russia as a whole. Two of the authors (I. L. B. and V. A. K.) are grateful to one degree or another to Prof. Bagrov for a comprehensive support in the initial period of their scientific career. Two other authors (S. A. F. and A. P. I.) are familiar with and use the work of scientists from the Tomsk School of Theoretical Physics founded by Prof. Bagrov. This paper is devoted to certain aspects of the higher-spin field theory mainly initiated and continued during I. L. B. and V. A. K. work in Tomsk. We demonstrate in details the simplicity and clarity of the Lagrangian formulation for free four-dimensional massless higher-spin fields within the universal BRST approach, while describing these fields in terms of two-component spin-tensors.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 11","pages":"1806 - 1818"},"PeriodicalIF":0.4,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143571091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Simulation by discrete element method using complex particles
IF 0.4 4区 物理与天体物理
Russian Physics Journal Pub Date : 2025-01-14 DOI: 10.1007/s11182-024-03355-2
D. V. Lobovikov, E. V. Matygullina, L. D. Sirotenko
{"title":"Simulation by discrete element method using complex particles","authors":"D. V. Lobovikov,&nbsp;E. V. Matygullina,&nbsp;L. D. Sirotenko","doi":"10.1007/s11182-024-03355-2","DOIUrl":"10.1007/s11182-024-03355-2","url":null,"abstract":"<div><p>Granular materials are characterized by complex mechanical behavior influenced significantly by the complex shape of real particles. An effective approach to studying the mechanical behavior of granular materials is currently simulation using the discrete element method. This paper presents a new model of a particle of complex shape with a minimal but sufficient number of constituent elements to reduce computer simulation time and a list of tests for verifying this model.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 11","pages":"2123 - 2128"},"PeriodicalIF":0.4,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143571085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of periodic overloads on the ∆K threshold estimates in an aluminum alloy
IF 0.4 4区 物理与天体物理
Russian Physics Journal Pub Date : 2025-01-14 DOI: 10.1007/s11182-024-03337-4
A. V. Eremin, A. A. Bogdanov, M. V. Burkov, S. V. Panin, R. Sunder
{"title":"Effect of periodic overloads on the ∆K threshold estimates in an aluminum alloy","authors":"A. V. Eremin,&nbsp;A. A. Bogdanov,&nbsp;M. V. Burkov,&nbsp;S. V. Panin,&nbsp;R. Sunder","doi":"10.1007/s11182-024-03337-4","DOIUrl":"10.1007/s11182-024-03337-4","url":null,"abstract":"<div><p>The effect of single overloads on the assessment of the threshold range of stress intensity factor in aluminum alloy AA7085 is analyzed. It is shown that in the cases where the testing procedure for measuring the ∆K threshold includes periodic overloads, the real threshold value might be underestimated by up to 49%. The estimates obtained in this study using a standard procedure are equal to ∆Kth=1.14 MPa √m, while the real value is 0.71 MPa √m. It is argued that a possible error in measuring ∆K threshold is to be compensated in fatigue tests by varying the load amplitude.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 11","pages":"1992 - 1998"},"PeriodicalIF":0.4,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143571087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On integrability of Klein-Gordon equations in electromagnetic fields invariant under subgroups of the Poincare group
IF 0.4 4区 物理与天体物理
Russian Physics Journal Pub Date : 2025-01-14 DOI: 10.1007/s11182-024-03324-9
A. A. Magazev, I. V. Shirokov
{"title":"On integrability of Klein-Gordon equations in electromagnetic fields invariant under subgroups of the Poincare group","authors":"A. A. Magazev,&nbsp;I. V. Shirokov","doi":"10.1007/s11182-024-03324-9","DOIUrl":"10.1007/s11182-024-03324-9","url":null,"abstract":"<div><p>The structure of the symmetry operator algebra of the Klein-Gordon equation in an external electromagnetic field is described in terms of cohomologies of the Poincare subalgebras. An application of the method of noncommutative integration to constructing exact solutions of the Klein-Gordon equation is discussed. A classification of inequivalent electromagnetic fields invariant under simply transitive subgroups of the Poincare group, admitting the noncommutative integration of the Klein-Gordon equation, is presented.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 11","pages":"1878 - 1886"},"PeriodicalIF":0.4,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143571092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electromagnetic spectra of magnetite and MWCNT ferrofluids
IF 0.4 4区 物理与天体物理
Russian Physics Journal Pub Date : 2025-01-14 DOI: 10.1007/s11182-024-03362-3
A. A. Pavlova, V. I. Suslayev, E. Yu. Korovin, D. A. Mazilov
{"title":"Electromagnetic spectra of magnetite and MWCNT ferrofluids","authors":"A. A. Pavlova,&nbsp;V. I. Suslayev,&nbsp;E. Yu. Korovin,&nbsp;D. A. Mazilov","doi":"10.1007/s11182-024-03362-3","DOIUrl":"10.1007/s11182-024-03362-3","url":null,"abstract":"<div><p>The paper focuses on electrophysical properties of ferrofluids based on kerosene and synthetic oil with iron oxides. The influence of multi-walled carbon nanotubes on shielding properties of ferrofluids is studied at different magnetic field orientations relative to electromagnetic field lines. Reflection coefficient spectra are obtained at the microwave frequency using mathematical simulation. This work shows the possibility of using ferrofluids to solve health and safety problems.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 11","pages":"2178 - 2184"},"PeriodicalIF":0.4,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143571090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Angular distribution of radiation from charged particle moving along circular arc
IF 0.4 4区 物理与天体物理
Russian Physics Journal Pub Date : 2025-01-13 DOI: 10.1007/s11182-024-03328-5
S. E. Boichenko, G. F. Kopytov, V. B. Tlyachev
{"title":"Angular distribution of radiation from charged particle moving along circular arc","authors":"S. E. Boichenko,&nbsp;G. F. Kopytov,&nbsp;V. B. Tlyachev","doi":"10.1007/s11182-024-03328-5","DOIUrl":"10.1007/s11182-024-03328-5","url":null,"abstract":"<div><p>The paper presents the in-depth analysis of the angular distribution of one linear polarization component of the radiation power averaged over frequency, for the charge moving along the circular arc with the radius R and central angle 2γ. Based on the numerical analysis, the angle range is obtained for extreme values of the sigma component of the radiation power. The velocity is determined for asymptotic formulas with good approximation.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 11","pages":"1918 - 1924"},"PeriodicalIF":0.4,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143570990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dual Lagrangian formulations for free massive fields of higher spins in three dimensions
IF 0.4 4区 物理与天体物理
Russian Physics Journal Pub Date : 2025-01-09 DOI: 10.1007/s11182-024-03329-4
E. D. Skvortsov, A. A. Sharapov, D. J. Shcherbatov
{"title":"Dual Lagrangian formulations for free massive fields of higher spins in three dimensions","authors":"E. D. Skvortsov,&nbsp;A. A. Sharapov,&nbsp;D. J. Shcherbatov","doi":"10.1007/s11182-024-03329-4","DOIUrl":"10.1007/s11182-024-03329-4","url":null,"abstract":"<div><p>New relativistic wave equations and Lagrangians are proposed for massive fields of integer spins in three-dimensional Minkowski space.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 11","pages":"1925 - 1930"},"PeriodicalIF":0.4,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143570915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cosmological lithium problem solution in accelerator experiment
IF 0.4 4区 物理与天体物理
Russian Physics Journal Pub Date : 2025-01-09 DOI: 10.1007/s11182-024-03320-z
G. N. Dudkin
{"title":"Cosmological lithium problem solution in accelerator experiment","authors":"G. N. Dudkin","doi":"10.1007/s11182-024-03320-z","DOIUrl":"10.1007/s11182-024-03320-z","url":null,"abstract":"<div><p>The cosmological lithium problem is a serious problem for understanding the early Universe, which casts doubt on the Big Bang nucleosynthesis (BBN) model. The problem is that the data on the abundance of <sup>6</sup>Li and <sup>7</sup>Li elements obtained from astronomic observations and in the BBN model are too different, based on the data on all nuclear reactions in which these elements produce (or destroy). Astronomy continues to improve the optical instrumentation in order to achieve better resolution and efficiency. In nuclear physics, cross sections of all reactions resulting in the lithium nucleus production (or destruction) are being clarified. This work presents a brief review of related theoretical calculations and experimental data. Experimental results are presented in the laboratory coordinate system for <sup>3</sup>H(<sup>3</sup>He, γ)<sup>6</sup>Li reaction at an energy of 38 keV, first obtained using the Hall ion accelerator in National Research Tomsk Polytechnic University, Tomsk, Russia. <i>S</i>-factor calculated for <sup>3</sup>H(<sup>3</sup>He, γ)<sup>6</sup>Li S = 0.15 ± 0.03 keV·b reaction is inconsistent either with approximation of the experimental data obtained at high energies, or theoretical calculations. It is also inconsistent with assumptions about a new physics hidden in this reaction. Our work discusses the possibility of solving the cosmological lithium problem <i>via</i> reactions with light neutron clusters.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 11","pages":"1838 - 1848"},"PeriodicalIF":0.4,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143570954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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