Physical Mesomechanics最新文献_第2页

Influence of Heat Treatments on Martensitic Transformations and Elastocaloric Effect in Two-Phase (β + γ) NiFeGa Alloys 热处理对两相 (β + γ) NiFeGa 合金中马氏体转变和弹性效应的影响

IF 1.8 4区材料科学

Physical Mesomechanics Pub Date : 2024-08-23 DOI: 10.1134/S1029959924040040

I. D. Kurlevskaya, E. Yu. Panchenko, A. B. Tokhmetova, E. I. Yanushonite, A. S. Eftifeeva, N. Yu. Surikov, E. E. Timofeeva, Yu. I. Chumlyakov

{"title":"Influence of Heat Treatments on Martensitic Transformations and Elastocaloric Effect in Two-Phase (β + γ) NiFeGa Alloys","authors":"I. D. Kurlevskaya, E. Yu. Panchenko, A. B. Tokhmetova, E. I. Yanushonite, A. S. Eftifeeva, N. Yu. Surikov, E. E. Timofeeva, Yu. I. Chumlyakov","doi":"10.1134/S1029959924040040","DOIUrl":"10.1134/S1029959924040040","url":null,"abstract":"This study reveals the impact of the formation mechanism of a two-phase (β + γ) structure during heat treatment on thermoelastic L21(B2)-10M/14M-L10 martensitic transformations and elastocaloric parameters of polycrystalline Ni54Fe19Ga27 alloy. It is experimentally shown that annealing of the as-cast Ni54Fe19Ga27 alloy in the temperature range 1173–1463 K for 0.5 h followed by water quenching leads to the precipitation of the γ phase at grain boundaries and inside grains. As the annealing temperature increases from 1173 to 1463 K, the thickness of the γ-phase layer at the grain boundaries doubles, particles inside the grains coarsen, and their volume distribution becomes nonuniform. Simultaneously, the martensitic transformation temperatures increase by 31–69 K. The nonuniform distribution of the γ-phase particles and the morphological features of martensite (refinement of its twinned structure) lead to a 5–6-fold widening of the martensitic transformation intervals in crystals annealed at 1448 K compared to the as-cast alloy. After cyclic superelastic tests with 20 to 100 loading/unloading cycles, two-phase (β + γ) polycrystals demonstrate the stable adiabatic cooling temperature ∆Tad (2.7–3.0 K) and do not crack along grain boundaries, unlike those in the as-cast state. Significant fatigue strength and a high coefficient of performance (up to 18.3) make (β + γ) Ni54Fe19Ga27 polycrystals promising for practical use in solid-state cooling.","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"27 4","pages":"398 - 408"},"PeriodicalIF":1.8,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nitrogen-Stabilized DLC Coatings: Optimization of Properties and Deposition Parameters Using Randomized Tree and Neural Network Algorithms 氮稳定 DLC 涂层：使用随机树和神经网络算法优化性能和沉积参数

IF 1.8 4区材料科学

Physical Mesomechanics Pub Date : 2024-08-23 DOI: 10.1134/S1029959924040015

A. I. Voropaev, V. I. Kolesnikov, O. V. Kudryakov, V. N. Varavka, I. V. Kolesnikov, M. S. Lifar, S. A. Guda, A. A. Guda, A. V. Sidashov

{"title":"Nitrogen-Stabilized DLC Coatings: Optimization of Properties and Deposition Parameters Using Randomized Tree and Neural Network Algorithms","authors":"A. I. Voropaev, V. I. Kolesnikov, O. V. Kudryakov, V. N. Varavka, I. V. Kolesnikov, M. S. Lifar, S. A. Guda, A. A. Guda, A. V. Sidashov","doi":"10.1134/S1029959924040015","DOIUrl":"10.1134/S1029959924040015","url":null,"abstract":"This work discusses the predictable control of plasma-assisted physical vapor deposition (PVD) of coatings. The multiple process parameters and the instability of the nonequilibrium ion plasma system create substantial obstacles to the wide industrial application of promising multicomponent functional coatings. Here we propose a solution to this problem, which includes: creation of a database of diamond-like carbon (DLC) coatings to identify a limited set of adjustable process control parameters, determination of how these parameters affect the coating properties, analysis of the revealed effects using statistical methods and neural network algorithms, and use of the results for the predictable tuning of specified coating properties. The object of research is original DLC coatings whose structure is stabilized with nitrogen instead of conventionally used hydrogen. The experimental database of DLC coatings is created based on our previous studies and includes structural, morphological and architectural characteristics of coatings, various types of substrates, sublayers, physical, mechanical and tribological properties, and various combinations of coating deposition parameters. A specific problem is solved to determine the influence of deposition parameters such as chamber pressure P, stabilizer content (% nitrogen), ion flux rate (coil current λ) and deposition time t on hardness H and elastic modulus E of coatings. Based on the results obtained, the deposition parameters are optimized so as to obtain predictable strength values of the formed carbon coating. The optimization procedure is developed using both classical statistical methods and modern algorithms of ridge regression, randomized trees (ExtraTrees), and a fully connected neural network (multilayer perceptron MLP).","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"27 4","pages":"355 - 369"},"PeriodicalIF":1.8,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Wear and Failure Analysis of Ti-6Al-4V Titanium Alloy with a Protective Coating during High-Speed Erosion 带保护涂层的 Ti-6Al-4V 钛合金在高速腐蚀过程中的磨损和失效分析

IF 1.8 4区材料科学

Physical Mesomechanics Pub Date : 2024-08-23 DOI: 10.1134/S1029959924040039

S. A. Atroshenko, R. Z. Valiev, N. F. Morozov, R. R. Valiev, Ya. N. Savina, M. N. Antonova, A. D. Evstifeev

引用次数: 0

A Function-on-Function Regression Model for Monitoring the Manufacturing Process Performance with Application in Friction Stir Welding 用于监控制造过程性能的功能对功能回归模型在搅拌摩擦焊中的应用

IF 1.8 4区材料科学

Physical Mesomechanics Pub Date : 2024-08-23 DOI: 10.1134/S102995992404009X

F. Ramezankhani, R. Noorossana, M. R. M. Aliha

{"title":"A Function-on-Function Regression Model for Monitoring the Manufacturing Process Performance with Application in Friction Stir Welding","authors":"F. Ramezankhani, R. Noorossana, M. R. M. Aliha","doi":"10.1134/S102995992404009X","DOIUrl":"10.1134/S102995992404009X","url":null,"abstract":"Friction stir welding is a relatively new way to join solid materials without melting using a nonconsumable tool, which has many applications in different industries including automotive, shipbuilding, and aerospace. Destructive testing is an integral part of engineering science, which costs a lot. Reducing the number of destructive tests via numerical calculations to determine the quality of welded parts is valuable. On the other hand, advances in computer technology and embedded sensing systems in different domains have made it possible to collect a variety of data in huge volume at an unbelievable velocity, which provides an opportunity and at the same time a challenge to engineers and practitioners to utilize this rich source of information efficiently. Functional data as a rich form of structured data allows for high dimensionality modeling and analysis of the data. In this paper, we develop a fully functional linear regression model to quantify and predict the quality of the process outputs by reducing the number of destructive tests and presenting a change-point detection model to avoid using the model when a change has occurred in one of the components of the process. Important issues such as autocorrelation and correlation are taken into account in the presented model. The functional variables of the model are solved by polynomial basis function expansions. The results of the experimental tests indicate that the proposed method performs well in detecting out-of-control conditions as well as estimating the change-point location. The obtained value of the multiple correlation coefficient 0.98 and the corresponding F-value equal to 652.95 support these results.","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"27 4","pages":"447 - 460"},"PeriodicalIF":1.8,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation on Thermomechanical Bending of Functionally Graded Sandwich Plates Using a Novel Combined 2D Integral Plate Model 使用新型组合二维积分板模型研究功能分级三明治板的热力学弯曲问题

IF 1.8 4区材料科学

Physical Mesomechanics Pub Date : 2024-08-23 DOI: 10.1134/S1029959924040118

H. Belarbi, B. Boucham, F. Bourada, A. Kaci, M. Bourada, A. Tounsi

引用次数: 0

One of the Scenarios for Supershear Earthquakes 超剪切地震场景之一

IF 1.8 4区材料科学

Physical Mesomechanics Pub Date : 2024-08-23 DOI: 10.1134/S1029959924040064

A. M. Budkov, S. B. Kishkina

{"title":"One of the Scenarios for Supershear Earthquakes","authors":"A. M. Budkov, S. B. Kishkina","doi":"10.1134/S1029959924040064","DOIUrl":"10.1134/S1029959924040064","url":null,"abstract":"This paper is a part of the study on the rupture propagation and seismic wave emission during the movement along the fault, whose fracture surface in different regions is made of geomaterials with different frictional properties. The slip surface of the fault is frictionally heterogeneous. It contains weakening zones (asperities), strengthening zones (barriers), and “background” zones that are almost neutral with respect to velocity and displacement. The scenario of a seismogenic rupture is determined precisely by the presence, number, and size of such zones with different dynamics of frictional characteristics. The study deals with the mechanics of supershear earthquakes, in which the rupture propagates with an unusually high velocity exceeding the shear wave velocity of the medium. Numerical simulation results confirm the existence of two different mechanisms governing the transition of an earthquake to the supershear regime. A model of the so-called “weak” fault is considered, for which the rupture velocity continuously increases from the sub-Rayleigh velocity CR to the shear wave velocity Cs and quickly exceeds it without any jump. This scenario is typical for faults with the measure of strength S under 0.8. The solved problem is not only of fundamental importance for understanding the earthquake mechanics, but also can find application in engineering seismology and the study of earthquake-induced rupture processes, because unlike an ordinary earthquake, supershear or fast ruptures cause strong shaking at a much greater distance from the source of the event (from the fault). This is confirmed by direct data on near-field ground motion obtained in recent years by research groups from different countries.","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"27 4","pages":"417 - 425"},"PeriodicalIF":1.8,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Grain Interaction and Elastic Strain Distribution in Polycrystalline Materials 多晶材料中的晶粒相互作用和弹性应变分布

IF 1.8 4区材料科学

Physical Mesomechanics Pub Date : 2024-08-23 DOI: 10.1134/S1029959924040076

V. E. Shavshukov

{"title":"Grain Interaction and Elastic Strain Distribution in Polycrystalline Materials","authors":"V. E. Shavshukov","doi":"10.1134/S1029959924040076","DOIUrl":"10.1134/S1029959924040076","url":null,"abstract":"Statistical distributions of the elastic strain and stress tensor components in the grains of polycrystalline materials are necessary to calculate the probabilities of various local critical events, such as damage and others, which are of random origin due to the stochastic grain structure. Many experimental and computational studies suggest that these distributions can be approximated by a normal distribution. The normal distribution parameters are determined from histogram-like plots obtained experimentally or by computer simulation. Most published histogram distributions are highly skewed, in contrast to the normal distribution. Here we present a new direct calculation method for the probability densities of the elastic strain tensor components. The method uses an integral equation for strains in heterogeneous solids, which reduces the solution of the boundary value problem of polycrystal deformation to the sum of solutions of some problems for neighboring grains. The focus is on the influence of random grain interactions on the strain distribution. Calculations are carried out for polycrystals with different elastic symmetries and degrees of grain anisotropy. All probability densities are finite, asymmetric, and noticeably different from Gaussian ones. It is shown that very few particularly located neighboring grains (of dozens) have a much greater effect on the distribution pattern and limiting values of the strain tensor components than all the others.","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"27 4","pages":"426 - 435"},"PeriodicalIF":1.8,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Damping Characteristics of Nonlocal Strain Gradient Waves in Thermoviscoelastic Graphene Sheets Subjected to Nonlinear Substrate Effects 受非线性基底效应影响的热弹性石墨烯薄片中的非局部应变梯度波的阻尼特性

IF 1.8 4区材料科学

Physical Mesomechanics Pub Date : 2024-08-23 DOI: 10.1134/S1029959924040106

R. Selvamani, T. Prabhakaran, F. Ebrahimi

引用次数: 0

Investigation of Thermal Impacts and Different Gradient Elasticity Theories on Wave Propagation through the Polymer Matrix Incorporated Carbon Nanotube Walls 热影响和不同梯度弹性理论对穿透聚合物基质碳纳米管壁的波传播的影响研究

IF 1.8 4区材料科学

Physical Mesomechanics Pub Date : 2024-08-23 DOI: 10.1134/S102995992404012X

K. Antar, Kh. Amara, A. Besseghier

引用次数: 0

Mechanical Properties of the Al3(TiTaZrNbHf) High Entropy Intermetallic Compound: A Molecular Dynamic Study Al3(TiTaZrNbHf) 高熵金属间化合物的力学性能：分子动力学研究

IF 1.8 4区材料科学

Physical Mesomechanics Pub Date : 2024-08-23 DOI: 10.1134/S1029959924040088

A. Ostovari Moghaddam, R. Fereidonnejad, D. V. Mikhailov, M. Naseri, E. A. Trofimov

{"title":"Mechanical Properties of the Al3(TiTaZrNbHf) High Entropy Intermetallic Compound: A Molecular Dynamic Study","authors":"A. Ostovari Moghaddam, R. Fereidonnejad, D. V. Mikhailov, M. Naseri, E. A. Trofimov","doi":"10.1134/S1029959924040088","DOIUrl":"10.1134/S1029959924040088","url":null,"abstract":"Deformation mechanisms of the Al3(TiTaZrNbHf) high entropy intermetallic compound under tensile loading were studied using molecular dynamic simulations. To this end, the site occupancy of the five constituent atoms that form the high entropy sublattice of Al3(TiTaZrNbHf) was first determined by simulating the near-equilibrium melting/crystallization process. It is shown that nuclei of intrinsic stacking faults are formed under early plastic deformation due to dislocation nucleation and glide, which further contribute to the formation and growth of twin boundaries. Twinning and 1/6<112> Shockley partial dislocations are key components in the plastic deformation of Al3(TiTaZrNbHf) at room and elevated temperatures, which is in good agreement with the experimental observations for D022-structured materials. The tensile strength of Al3(TiTaZrNbHf) is 4.6 GPa at 300 K and slightly decreases to 4.34 GPa at 1000 K, highlighting the unique properties of high entropy intermetallic compounds in retaining their mechanical properties at elevated temperatures. The derived results provide grounds for understanding the atomic-scale origin of deformation mechanisms in high entropy intermetallic compounds. They also show potentials for tailoring the chemical composition of intermetallic compounds to overcome the problem of low ductility, paving the way to their industrial applications.","PeriodicalId":726,"journal":{"name":"Physical Mesomechanics","volume":"27 4","pages":"436 - 446"},"PeriodicalIF":1.8,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0