Physics of Metals and Metallography最新文献

{"title":"Simulation of the Evolution of Phase Composition and Austenite Grain Size upon Multi-Pass Hot Deformation of Low-Alloy Steels","authors":"I. I. Gorbachev, E. I. Korzunova, V. V. Popov, D. M. Khabibulin, N. V. Urtsev","doi":"10.1134/s0031918x23602858","DOIUrl":"https://doi.org/10.1134/s0031918x23602858","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\u0000<b>Abstract</b>\u0000</h3><p>The paper presents a model for predicting the structural characteristics and phase composition of low-alloy steels upon hot rolling in the multi-pass deformation mode. The model considers recovery, dynamic, primary, dynamic and static recrystallization of grains, and the normal grain growth, as well as nucleation (including accelerated nucleation during deformation), growth or dissolution, and coarsening of carbonitride particles. The comparison between the calculated results and the experimental data available in the publications shows a satisfactory agreement.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"58 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141166750","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}

{"title":"Temperature Studies of the LaMn2Si2 Intermetallide by the Raman Spectroscopy and Magnetic Force Microscopy Methods","authors":"Yu. V. Korkh, E. A. Ponomareva, A. V. Druzhinin, E. G. Gerasimov, N. V. Mushnikov, T. V. Kuznetsova","doi":"10.1134/s0031918x23603086","DOIUrl":"https://doi.org/10.1134/s0031918x23603086","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\u0000<b>Abstract</b>\u0000</h3><p>Raman spectra of the LaMn₂Si₂ compound were obtained for the first time by Raman spectroscopy. The change in the Raman spectral characteristics in the temperature range of 263–553 K was investigated. The high sensitivity of the Raman spectroscopy method to a change in the magnetic state caused by a temperature influence has been determined. A change in the spectral characteristics of the vibration mode of manganese atoms near the Curie and Neel temperatures has been revealed. The magnetic force microscopy technique was used to investigate the surface features of the LaMn₂Si₂ compound at room temperature. A change in the type of magnetic domain structure in LaMn₂Si₂ after cooling from 298 to 263 K has been found.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"46 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141166752","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}

{"title":"Investigation of the Absorption Properties of Multilayer Composites Based on ABS Plastic with Boron Nitride","authors":"N. A. Kovalenko, V. V. Tarnavich, Yu. O. Chetverikov","doi":"10.1134/s0031918x23602834","DOIUrl":"https://doi.org/10.1134/s0031918x23602834","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The absorption capabilities of various plastics, including those with different contents of boron nitride for ABS plastic, were simulated. Simulation was performed using the PHITS software package. In this study, the results of simulating the absorption capacity of plastic are compared with the experimental data. A case of the practical application of ABS plastic as neutron-absorbing shutters of a diaphragm is considered.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"25 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140925783","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}

{"title":"The Features of the Phase Composition and Structure of a Rapidly Quenched Ferromagnetic Mn–Al–Ga Alloy","authors":"A. S. Fortuna, T. A. Morozova, D. Yu. Karpenkov, M. V. Gorshenkov","doi":"10.1134/s0031918x23602810","DOIUrl":"https://doi.org/10.1134/s0031918x23602810","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\u0000<b>Abstract</b>—</h3><p>Rapidly quenched Mn₅₅Al₃₆Ga₉ ribbons have been obtained using a spinning method. In the initial quenched state, the ribbon structure is a two-phase one consisting of the ε and γ₂ phases. It has been established that, upon heating, the alloy undergoes a series of phase transformations, including the precipitation of the equilibrium β-Mn phase and its subsequent dissolution, the formation of the ferromagnetic τ phase from both the ε and γ₂ phases. The largest amount of the τ phase was obtained by annealing at a temperature of 700°C for 20 min. This work describes both the phase composition obtained as a result of annealing at different temperatures and the features of the microstructure studied via electron microscopy.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"38 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140925849","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}

{"title":"Capillary Phenomena during Interaction of Copper Melt with Dense and Porous MAX Phases with General Formula (Cr,Mn)2AlC","authors":"S. N. Zhevnenko, M. V. Gorshenkov","doi":"10.1134/s0031918x23602640","DOIUrl":"https://doi.org/10.1134/s0031918x23602640","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In this study, we experimentally investigated the interaction of a pure copper melt with dense MAX phase (Cr,Mn)₂AlC obtained as a result of sintering by the spark plasma method and with a porous phase compacted by room temperature pressing. The porous phase (porosity 20%) absorbs a molten copper at temperatures above 1200°C. The absorption kinetics is measured using a high speed (HS) thermo-visioning camera and an HS video camera. The experiments are carried out under a vacuum pressure of 10^–3 Pa. Scanning electron microscopy studies, microanalyses by the method of X-ray spectroscopy, and X-ray diffraction studies have shown that chemical reactions of the MAX phase with a copper melt lead to the formation of a solution of aluminum and chromium in copper and the decomposition of the MAX phase to stable and/or metastable chromium carbides. The dense sintered sample reacts with the melt though the contact (wetting) angles are more than 100°. The difference between porous and dense samples is in the reaction kinetics. The obtained results are compared with the earlier conducted experiments on wetting of the Cr₂AlC MAX phase by a Cu melt (with 0.8 at % Cr). The conditions in the earlier described experiments and the results of determining changes in the chemical composition and the phase composition during capillary experiments indicate that a composite material with a submicrometer structure of chromium carbide impregnated with aluminum bronze can be obtained.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"357 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140942219","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}

{"title":"Contact Potential Difference in the Absence of a Current through a Sample in the Quantum Hall Effect Regime in InGaAs/InAlAs Heterostructure","authors":"S. V. Gudina, V. N. Neverov, K. V. Turutkin, I. S. Vasil’evskii, A. N. Vinichenko","doi":"10.1134/s0031918x23603165","DOIUrl":"https://doi.org/10.1134/s0031918x23603165","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The paper presents experimental results of the appearance of a voltage at the potential contacts in the absence of an external current through a sample in the plateau region of the quantum Hall effect in a heterostructure with an InGaAs/InAlAs quantum well. The occurrence of a voltage is associated with the nonequivalence of the edge current in the potential contact areas in a magnetic field in a system with a two-dimensional electron gas.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"5 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140925852","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}

{"title":"Order–Disorder Phase Transitions in Fe81Ga19–RE Alloys (RE = Dy, Er, Tb, Yb) According to Neutron Diffraction Data","authors":"A. M. Balagurov, B. Yerzhanov, B. Mukhametuly, N. Yu. Samoylova, V. V. Palacheva, S. V. Sumnikov, I. S. Golovin","doi":"10.1134/s0031918x2360286x","DOIUrl":"https://doi.org/10.1134/s0031918x2360286x","url":null,"abstract":"<p><b>Abstract</b>—New data on the phase compositions and structural transformations in a number of Fe₈₁Ga₁₉ alloys doped with trace amounts (≤0.2 at %) of rare earth elements are presented. The data were obtained in neutron diffraction experiments performed with high resolution and in a continuous temperature scanning mode under heating to 900°C and subsequent cooling. It has been established that structural rearrangements generally proceed in an identical manner both in the original Fe₈₁Ga₁₉ alloy and in its doped analogues. Slow heating and subsequent cooling of the alloys (at a rate of ±2°C/min) leads to the formation of clusters of the <i>D</i>0₃ phase with sizes in the range of 200–300 Å in the matrix of the disordered <i>A</i>2 phase. The sizes and volume fraction of clusters (~0.3 of the sample volume) weakly depend on a specific composition. The degree of ordering of the atomic structure of clusters changes with temperature according to a phase transition of the second kind and is close to unity at room temperature. The search for structural ordering corresponding to the modified <i>D</i>0₃ phase, which was discovered in a number of electron-diffraction studies, did not lead to a positive result.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"5 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140925855","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}

{"title":"Relaxation of the Excess Free Volume of the Phase Transformation at the Phase Interface between the Crystal and the Melt","authors":"V. O. Esin","doi":"10.1134/s0031918x23602780","DOIUrl":"https://doi.org/10.1134/s0031918x23602780","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The paper analyzes the excess free volume relaxation mechanism of the phase transformation, which is realized in the local dilatation region at the phase interface between the crystal and the melt. It also examines the structural state of phase interface and its influence on the phase interface mobility under pressure, applied during crystal growth from the melt. The paper explains the extreme impact of pressure on the mobility of phase interface. It also discusses the possibility of the phase interface reaching a state of anomalously high mobility under “optimal” pressure (referred to as “ultra-mobility”). As part of the mechanism of viscous flow of melt into the local dilatation region at the phase interface, arising in the crystallization process, a quantitative agreement with the experimental value of the “optimal” pressure, which ensures the extreme nature of the crystal–melt phase interface mobility, has been obtained.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"64 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140925851","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}

{"title":"The Impact of Thermomechanical Treatment on Structure, Electrical Resistance and Hardness of Al–4% Cu–3% Mn Alloy Casted in an Electromagnetic Crystallizer","authors":"N. A. Belov, S. O. Cherkasov, N. O. Korotkova, M. M. Motkov","doi":"10.1134/s0031918x23603177","DOIUrl":"https://doi.org/10.1134/s0031918x23603177","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The impact of thermomechanical treatment on the structure, electrical resistance, and hardness of the Al–4% Cu–3% Mn alloy, which was obtained by casting in an electromagnetic crystallizer, has been investigated using computational and experimental methods. It has been shown that at the cooling rate of more than 1000 K/s, the whole amount of manganese and half of the copper content are dissolved in the aluminum solid solution. This enables the formation of a structure with the maximum possible number of Al₂₀Cu₂Mn₃ dispersoids after subsequent thermomechanical treatment, resulting in a significant improvement in the thermal resistance compared to the known alloys of Al–Cu–Mn system.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"46 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140925854","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}

{"title":"Studying the Effect of Small Additives of Sc and Zr on the Microstructure of Al–Mg–Si Alloy with Excess Silicon during Multi-Step Heat Treatment","authors":"E. V. Aryshenskii, M. A. Lapshov, D. Yu. Rasposienko, S. V. Konovalov, A. M. Drits, V. V. Makarov","doi":"10.1134/s0031918x23602573","DOIUrl":"https://doi.org/10.1134/s0031918x23602573","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The work is devoted to the study of the effect of multi-step heat treatment on the formation of the microstructure of the alloy of Al–Mg–Si series, alloyed with scandium and zirconium at the ratio of Mg/Si = 0.3. For this purpose, the base AlMgSi alloy, containing no scandium and zirconium, as well as its modification AlMgSiScZr with additions of these elements were cast. Multi-step heat treatment of AlMgSiScZr alloy consisted of four steps of annealing: at 550°C for 8 h + at 440°C for 8 h + at 500°C for 0.5 h + at 180°C for 5 h. For AlMgSi alloy, it included two steps: at 550°C for 8 h + at 180°C for 5 h. The microstructure of AlMgSiScZr alloy was studied in the cast state, as well as after each step of heat treatment by scanning and transmission electron microscopy, while AlMgSi alloy was studied in the cast state and after the final heat treatment. After each step of heat treatment, the microhardness of the studied alloys was measured. It was found that during cooling of the ingot, in the alloys under consideration coarse intermetallics of Fe₂Mg₇Si₁₀Al₁₈ type were formed, which partially were dissolved during subsequent heat treatment. At the same time, in the alloy with scandium and zirconium additives, particles that can be attributed either to (AlSi)₃ScZr or to the τ (phase) of AlSc₂Si₂ are present at the intergranular boundaries. No traces of intermittent decomposition of the scandium supersaturated solid solution during cooling of the ingot were found. Heat treatment at 550°C for 8 h + at 440°C for 8 h leads to the appearance of a phase that can be both AlSc₂Si₂ and Al₅SiZr₂, while no (AlSi)₃ScZr nanoparticles are formed. Heating at 500°C for 30 min enables complete dissolution of the magnesium-containing particles. At the final step, β\" (Mg₅Si₆) particles are formed in the investigated alloys, while scandium has no significant effect on their formation.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"146 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140925782","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}