Russian Physics Journal最新文献_第2页

Hydrogen continuum in discharges in argon, nitrogen, and air with water vapor 氢连续体在氩气、氮气和空气中随水蒸气排出

IF 0.8 4区物理与天体物理

Russian Physics Journal Pub Date : 2026-06-23 DOI: 10.1007/s11182-026-03716-z

V. F. Tarasenko, E. Kh. Baksht, A. N. Panchenko

引用次数: 0

On the possibility of melting the contact layer of steel in dry sliding against steel under electric current 在电流作用下，钢与钢干滑动时接触层熔化的可能性

IF 0.8 4区物理与天体物理

Russian Physics Journal Pub Date : 2026-06-23 DOI: 10.1007/s11182-026-03704-3

M. I. Aleutdinova, V. V. Fadin

{"title":"On the possibility of melting the contact layer of steel in dry sliding against steel under electric current","authors":"M. I. Aleutdinova, V. V. Fadin","doi":"10.1007/s11182-026-03704-3","DOIUrl":"10.1007/s11182-026-03704-3","url":null,"abstract":"<div>Dry sliding of C235 steel against quench-hardened C45 steel is performed at a high-density alternating electric current. The contact layer is subjected to plastic deformation. The formation of a tribolayer consisting mainly of FeO and α‑Fe phases is demonstrated. The contact surface is found to contain two sectors with different morphological features. One of the sectors shows the signs of melt formation. Using an EDX analysis, higher oxygen content is demonstrated in the melt zone, compared with that in the other sector. Oxygen serves as an indicator of FeO formation. A decrease in the oxygen concentration is found with the increasing distance from the sliding surface. It is noted that this is not indicative of a gradient structure. These data are used to calculate the melt layer thickness, which decreases with the decreasing electrical power at the contact spot. The maximum power at the contact spots causes the formation of a melt layer thinner than 7 μm under mild wear conditions. The calculation serves as the evidence for melt formation due to Joule heat, but not due to electric arc formation. A tribolayer scheme consisting of three sublayers is proposed.</div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"69 2","pages":"149 - 157"},"PeriodicalIF":0.8,"publicationDate":"2026-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699659","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 vibrational frequency shifts on internal conversion rate constant calculations 振动频移对内换算常数计算的影响

IF 0.8 4区物理与天体物理

Russian Physics Journal Pub Date : 2026-06-23 DOI: 10.1007/s11182-026-03708-z

L. I. Valiulina, R. Valiyev, V. N. Cherepanov, V. P. Tuguldurova

引用次数: 0

The influence of ultrasound on the structure and properties of the Mg-8.6Zn-1.2Zr biodegradable magnesium alloy during multi-cycle ECAP 超声对Mg-8.6Zn-1.2Zr可生物降解镁合金在多循环ECAP过程中结构和性能的影响

IF 0.8 4区物理与天体物理

Russian Physics Journal Pub Date : 2026-06-23 DOI: 10.1007/s11182-026-03709-y

D. A. Aksenov, R. N. Asfandiyarov, M. A. Shishkunova, A. G. Raab, Y. R. Sementeeva

引用次数: 0

Possibilities of forming a plasma antenna by laser radiation in an aerosol atmosphere 在气溶胶大气中用激光辐射形成等离子体天线的可能性

IF 0.8 4区物理与天体物理

Russian Physics Journal Pub Date : 2026-06-23 DOI: 10.1007/s11182-026-03718-x

S. F. Balandin, Yu. I. Buyanov, V. A. Donchenko, V. F. Myshkin, A. I. Potekaev, V. A. Khan

引用次数: 0

Computer modeling of mechanical and optical effects in standard fiber-Optic cables under mechanical load 机械载荷下标准光纤电缆机械和光学效应的计算机模拟

IF 0.8 4区物理与天体物理

Russian Physics Journal Pub Date : 2026-06-23 DOI: 10.1007/s11182-026-03692-4

A. D. Alkina, A. D. Mekhtiyev, E. N. Bilichenko, E. G. Neshina, A. M. Asylbekova

{"title":"Computer modeling of mechanical and optical effects in standard fiber-Optic cables under mechanical load","authors":"A. D. Alkina, A. D. Mekhtiyev, E. N. Bilichenko, E. G. Neshina, A. M. Asylbekova","doi":"10.1007/s11182-026-03692-4","DOIUrl":"10.1007/s11182-026-03692-4","url":null,"abstract":"<div>The paper presents a hybrid physico-mathematical model for the quantitative analysis and prediction of optical losses in standard fiber-optic cables subjected to mechanical loading. The stress-strain state is calculated by the finite element modeling in ANSYS Mechanical, which is combined with numerical solutions of the Helmholtz equation in COMSOL Multiphysics to describe the light propagation. It is shown that tension and microbending cause the stress redistribution in the fiber core and a change in the refractive index according to ∆n = −0.5n3pε, leading to an increase in the attenuation coefficient following the exponential law α = α0exp(kσ). Numerical results are in good agreement with the experimental data (R = 0.95, deviation < 7%). The developed model is aimed at practical production and diagnostic tasks in fiber-optic network operation implemented in AO ‘Kazakhtelecom’ and the QarTech Innovation and Industrial Hub. The results make it possible to predict the optical degradation without the structural modification of the cable and provide a basis for design of quasi-distributed fiber-optic sensors applicable to telecommunication and energy systems.</div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"69 2","pages":"227 - 234"},"PeriodicalIF":0.8,"publicationDate":"2026-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699631","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

Influence of dislocation structure, temperature and grain size on hardening of Cu-Al alloys in low-stability state 位错组织、温度和晶粒尺寸对Cu-Al合金低稳定态硬化的影响

IF 0.8 4区物理与天体物理

Russian Physics Journal Pub Date : 2026-06-23 DOI: 10.1007/s11182-026-03710-5

L. I. Trishkina, A. A. Klopotov, A. I. Potekaev, T. V. Cherkasova, V. I. Borodin, V. V. Kulagina, O. G. Volokitin

{"title":"Influence of dislocation structure, temperature and grain size on hardening of Cu-Al alloys in low-stability state","authors":"L. I. Trishkina, A. A. Klopotov, A. I. Potekaev, T. V. Cherkasova, V. I. Borodin, V. V. Kulagina, O. G. Volokitin","doi":"10.1007/s11182-026-03710-5","DOIUrl":"10.1007/s11182-026-03710-5","url":null,"abstract":"<div>The paper focuses on the dependence σ = f(ρ½) between the flow stress and the square root of average scalar dislocation density for the Cu-Al system alloys in a low-stability state with regard to the types of the dislocation structure. This linear dependence σ = f(ρ½) is obtained in a wide range of strain (at each stage), temperature, and grain size at different content of the second element. It is found that at a given strain stage, a transition from the main dislocation structure to another indicates to a transition to the next stage. In this case, this dependence demonstrates changes in the slope of the curve. It is shown that these changes can be caused by two reasons: the formation of the new type of the dislocation structure and changes in the deformation mechanism associated with the number of microtwin systems and a transition from one slip system to several of them.Experiments show that in a wide range of strain, content of the solid solution, temperature, and grain size, the relation σ = σf + mαGbρ½ is satisfied. The deviation from the linear dependence σ = f(ρ½) and changes in the dimensionless factor mα are attributed to the formation of new dislocation structures and another deformation mechanisms. In alloys consisting of the higher content of the alloying element, the substructural hardening is supplemented by the twinning mechanism.</div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"69 3","pages":"306 - 317"},"PeriodicalIF":0.8,"publicationDate":"2026-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149068047","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

Localization of adiabatic shear bands in an AZ31 magnesium plate under loading by a punch AZ31镁板在冲压载荷下绝热剪切带的局部化

IF 0.8 4区物理与天体物理

Russian Physics Journal Pub Date : 2026-06-19 DOI: 10.1007/s11182-026-03712-3

S. A. Zelepugin, V. V. Skripnyak, V. A. Skripnyak, A. E. Kiryushkin

引用次数: 0

Influence of hyperparameter optimization on the predictive accuracy of supervised machine learning models for the wear behavior of AA7075/SiC microwave sintered composites 超参数优化对监督机器学习模型对AA7075/SiC微波烧结复合材料磨损行为预测精度的影响

IF 0.8 4区物理与天体物理

Russian Physics Journal Pub Date : 2026-06-19 DOI: 10.1007/s11182-026-03700-7

Venkateswara Reddy Kunduru

{"title":"Influence of hyperparameter optimization on the predictive accuracy of supervised machine learning models for the wear behavior of AA7075/SiC microwave sintered composites","authors":"Venkateswara Reddy Kunduru","doi":"10.1007/s11182-026-03700-7","DOIUrl":"10.1007/s11182-026-03700-7","url":null,"abstract":"<div>The present study investigates the prediction of wear behavior of AA7075/SiC composites using supervised machine learning (ML) algorithms, emphasizing the role of hyperparameter tuning in enhancing model accuracy. Experimental wear data were generated through pin-on-disc tests under varying SiC reinforcement contents (0–9 wt.%), applied loads, sliding velocities, and sliding distances. Two ensemble-based ML algorithms—Random Forest (RF) and Extreme Gradient Boosting (XGBoost)—have been developed to model the nonlinear relationship between input process parameters and wear rate. Hyperparameter optimization using Grid Search significantly improved predictive performance, yielding R2 ≈ 0.89 and RMSE ≈ 0.0009 for both models. Statistical and residual analyses confirmed that the tuned models provided unbiased and normally distributed errors, ensuring strong generalization capability. The results indicated that SiC reinforcement was the most influential parameter in reducing wear rate, followed by load and sliding distance. The study demonstrates that integrating experimental tribological data with optimized ML algorithms offers a robust and efficient framework for data-driven prediction and process optimization in aluminum matrix composites.</div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"69 2","pages":"173 - 184"},"PeriodicalIF":0.8,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699664","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 repeated weld repairs and stress-relief annealing on tensile properties and microstructure of SS304 stainless steel 反复焊补和去应力退火对SS304不锈钢拉伸性能和显微组织的影响

IF 0.8 4区物理与天体物理

Russian Physics Journal Pub Date : 2026-06-19 DOI: 10.1007/s11182-026-03711-4

Atif Shazad, Muhammad Uzair, Lubna Sharif, Muhammad ShahAreeb

{"title":"Effect of repeated weld repairs and stress-relief annealing on tensile properties and microstructure of SS304 stainless steel","authors":"Atif Shazad, Muhammad Uzair, Lubna Sharif, Muhammad ShahAreeb","doi":"10.1007/s11182-026-03711-4","DOIUrl":"10.1007/s11182-026-03711-4","url":null,"abstract":"<div>Austenitic stainless steels, particularly SS304, are highly regarded for their outstanding mechanical performance and resilience under load, making them a popular choice in a wide range of industrial applications. SS304 stainless steel is frequently used in environments where both mechanical strength and corrosion resistance are critical, e.g., in chemical processing, food and beverage industries, and marine environments. This study investigates the effect of multiple weld repairs and post-weld heat treatment (PWHT) on the microstructure and mechanical properties of SS304 weld joints. Repeated welding causes a significant carbide segregation and the formation of non-metallic inclusions, leading to embrittlement, reduced ductility and mechanical properties. Grain boundary sensitization results from multiple weld repairs; due to non-uniform thermal cycles carbide segregation ultimately causes sensitization. Moreover, very disturbed grain microstructure is ameliorated to the coarse-grained austenite matrix, which promotes ductility. Specifically, ultimate tensile strength (UTS) and yield strength (YS) decline by 37.8% and 24%, respectively, after the first weld repair, with further reductions observed after the second repair. Heat treatment, particularly a stress relieving process, effectively mitigates these adverse effects by promoting the uniform diffusion of carbides and other precipitates in the austenite matrix, reducing embrittlement, relieving residual stresses and coarsening grain boundaries. PWHT further mitigates the UTS by 4.7% and 6.3% for the first and second weld repairs, respectively, while the YS decreases by 8.5% and 9.1%. Percent elongation, a key indicator of ductility, increases by 46% for initial weld samples and approximately by 71% and 68% for repaired samples following PWHT.</div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"69 3","pages":"318 - 327"},"PeriodicalIF":0.8,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149068039","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