Inorganic Materials: Applied Research最新文献

{"title":"Coating of a Multicomponent System Al–Cr–Ni–Co–Fe on a Steel Substrate Obtained by Laser","authors":"D. A. Gerashchenkov,&nbsp;R. Yu. Bystrov","doi":"10.1134/S2075113322060065","DOIUrl":"10.1134/S2075113322060065","url":null,"abstract":"<div><div><p><b>Abstract</b>—In recent years, the unique physical and mechanical properties of high-entropy alloys (HEAs) have been the subject of increased attention of researchers. The study of the thermodynamic characteristics of such materials may be of interest for formulating the principles of the formation of structures with the required functional characteristics. Since the processes of structure and phase formation, as well as the diffusion mobility of atoms, the mechanism for the formation of mechanical properties, and thermal stability, differ significantly from similar processes in traditional alloys, HEAs are singled out into a special group of materials. The article presents a brief overview of the results of obtaining a high-entropy alloy by the combined method. At the first stage, a precursor layer was deposited by cold gas dynamic spraying (CGDS), and at the second stage, it was subjected to high-energy action using a laser. An alloy of the Al–Cr–Ni–Co–Fe type has been studied. By varying the ratio of the components, it was possible to obtain an almost equimolar composition for this system. A prediction of properties and structure is made on the basis of the phase composition of the system.</p></div></div>","PeriodicalId":586,"journal":{"name":"Inorganic Materials: Applied Research","volume":"13 6","pages":"1569 - 1574"},"PeriodicalIF":0.75,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4016496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of the Properties, Structure, and Quality of the Ti–4.25Al–2V Alloy Blanks Produced by Direct Laser Deposition","authors":"V. P. Leonov,&nbsp;N. F. Molchanova,&nbsp;A. A. Voropaev,&nbsp;S. A. Shalnova,&nbsp;E. V. Chudakov,&nbsp;M. V. Iksanov","doi":"10.1134/S2075113322060144","DOIUrl":"10.1134/S2075113322060144","url":null,"abstract":"<p>The results of studying the mechanical properties of the Ti–4.25Al–2V titanium alloy produced by direct metal deposition with use of the equipment developed by the St. Petersburg State Marine Technical University are described. The mechanical properties of the deposited metal are compared with those of the cast and forged metal blanks. It is shown that the superior properties of the former in comparison with cast metal are associated with differences in the structure (in particular, with a high degree of dispersity).</p>","PeriodicalId":586,"journal":{"name":"Inorganic Materials: Applied Research","volume":"13 6","pages":"1552 - 1561"},"PeriodicalIF":0.75,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4016582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production of Single-Crystal Seeds [001] from Nickel–Tungsten Alloys by Directional Crystallization","authors":"V. N. Toloraya,&nbsp;G. A. Ostroukhova","doi":"10.1134/S2075113322060272","DOIUrl":"10.1134/S2075113322060272","url":null,"abstract":"<p>The problem of obtaining priming materials from Ni–W alloys arose in connection with the development of technology for casting single-crystal turbine blades of gas turbine engines (GTE) from high-temperature alloys. This technology uses a seed method for producing single-crystal castings with a crystallographic orientation [001] using seedings from alloys of the Ni–W system with a melting point 120–140°C higher than the casting alloy. The use of such primers greatly simplifies the casting process of turbine blades with a single-crystal structure, increases its reliability both in pass-through furnaces of the PMP-2 type and in high-gradient furnaces of the UVNK-9A type. The article presents the results of the study of the influence of temperature–velocity parameters of directional crystallization, namely, the temperature gradient <i>G</i>_<i>Z</i> on the structure of the obtained single-crystal seed blanks, as well as the study of effects of tungsten and carbon on the structure of single-crystal seed blanks, and makes recommendations for optimizing the technological process of single-crystal casting of Ni–W seed blanks adjusting the alloy composition for the seed blanks.</p>","PeriodicalId":586,"journal":{"name":"Inorganic Materials: Applied Research","volume":"13 6","pages":"1469 - 1476"},"PeriodicalIF":0.75,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4015713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Properties of Fiberglass Based on Fire-Resistant Polyester Resins Produced in Russia, Brands Arkpol 40 M and Polymer 3088 TA","authors":"V. S. Tryasunov,&nbsp;E. L. Shultseva,&nbsp;A. M. Baganik,&nbsp;Yu. V. Polyakova","doi":"10.1134/S2075113322060284","DOIUrl":"10.1134/S2075113322060284","url":null,"abstract":"<div><div><p><b>Abstract</b>—This article presents the results of technological, physicomechanical, and fire-resistant tests of polyester resins, binders, and fiberglass on their basis produced by contact molding. The obtained results are compared with those of fiberglass used at present in shipbuilding.</p></div></div>","PeriodicalId":586,"journal":{"name":"Inorganic Materials: Applied Research","volume":"13 6","pages":"1615 - 1621"},"PeriodicalIF":0.75,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4015990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Initial Powder Characteristics on Microrelief Features in the ZhS6K Grade Alloy after Selective Laser Fusion","authors":"A. N. Raevskikh,&nbsp;E. B. Chabina,&nbsp;E. V. Filonova","doi":"10.1134/S207511332206020X","DOIUrl":"10.1134/S207511332206020X","url":null,"abstract":"<p>The appearance of ZhS6K grade alloy granules, the surface and internal structure, and the chemical composition thereof have been analyzed. It is shown that one can control the formation of a preset state of interfaces (tracks, crystallization cells, hatch block boundaries, grains, phases, and discontinuities such as pores and cracks) through the fractional composition, packing density upon filling, and scanning speed in order to obtain a better material quality. The initial structural state of the samples has been studied. An interrelation between the structure of crystallization cell boundaries, dispersed particles, and the structure of fragments has been established. It is shown that all the studied samples have different structural features at the same power and scanning strategy. The analysis has been performed using the methods of optical metallography and scanning electron microscopy (SEM).</p>","PeriodicalId":586,"journal":{"name":"Inorganic Materials: Applied Research","volume":"13 6","pages":"1592 - 1604"},"PeriodicalIF":0.75,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4016190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High Strength Austenite Mn–Ni–Cu–V–C Dispersion Hardened Steel","authors":"M. V. Kostina,&nbsp;V. M. Blinov,&nbsp;G. Yu. Kalinin,&nbsp;O. V. Fomina,&nbsp;S. Yu. Mushnikova","doi":"10.1134/S2075113322060132","DOIUrl":"10.1134/S2075113322060132","url":null,"abstract":"<div><div><p><b>Abstract</b>—This article presents the results of studies of the structure and mechanical properties of high strength austenite chromium-free dispersion hardened Mn–Ni–V–C steel with the yield stress of at least 700 MPa; its composition and hardening method have been selected with consideration that the steel should meet the requirements of high strength and non-magnetization as well as possess a value of electrode potential in chloride media preventing galvanic corrosion during the contact with ferromagnetic low alloy and carbon steels. It has been established that, upon addition of 1–2% Cu to Mn–Ni–V–C steel, on the phase diagram of Fe–Ni–Mn, the region of existence of the γ phase is broadened, and the two phase γ + α region is narrowed and displaced toward lower Mn contents, thus increasing the austenite stability against martensite transformation upon cold deformation. Numerical assessment of the influence of alloying austenite elements Ni, Mn, and Cu on the critical extent of cold plastic deformation leading to formation of deformation martensite in steel is proposed. The temperature range of reverse transformation of this martensite into austenite during annealing has been determined as a function of nickel content in steel. The regularities of dissolution upon heating for quenching and deposition of particles of the hardening carbide phase VC have been studied for dispersion hardened steel with the following composition: 10% Mn; 10% Ni; 2% Cu; 0.3–0.4% C; ~1.4% V. It has been demonstrated that the maximum strength is achieved after quenching from 1150°C and aging at 650°C for 15 h. The cyclic durability of steel increases with the aging duration from 0.7 to 10 h; however, the strength aging close to the maximum leads to a decrease in this performance. Taking into account the performed studies of austenite stability, static and cyclic strength, and durability, the optimum interval of steel alloying with nickel, manganese, and copper has been substantiated, and the optimum mode of thermal tre-atment providing a combination of high strength with good plasticity and toughness of steel has been det-ermined.</p></div></div>","PeriodicalId":586,"journal":{"name":"Inorganic Materials: Applied Research","volume":"13 6","pages":"1515 - 1525"},"PeriodicalIF":0.75,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4378130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On the Mechanism of Formation of Electrochromic WO3 Films on the Surface of Sn, Ti, ITO Electrodes in the Process of Cathodic Electrodeposition","authors":"Alexey V. Shchegolkov,&nbsp;M. S. Lipkin,&nbsp;Alexander V. Shchegolkov,&nbsp;E. V. Korbova,&nbsp;T. V. Lipkina,&nbsp;V. M. Lipkin","doi":"10.1134/S2075113322060223","DOIUrl":"10.1134/S2075113322060223","url":null,"abstract":"<div><div><p><b>Abstract</b>—The mechanism of the electrochemical formation of WO₃ films on the surface of titanium, tin, and ITO electrodes is investigated under various regimes, including the deposition time τ = 2000–8000 s and the electrochemical potential of deposition on the cathode in the range from –0.4 to –1 V. A technique for the synthesis of peroxytungstic acid and a method of cathodic electrodeposition are presented. The studies carried out with tin and titanium extend the field of application of WO₃ films to technologies of chemical current sources and fuel cells.</p></div></div>","PeriodicalId":586,"journal":{"name":"Inorganic Materials: Applied Research","volume":"13 6","pages":"1605 - 1614"},"PeriodicalIF":0.75,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4378134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Changes in the Structural and Textural States of VT41 Titanium Alloy Resulting from Hot Upsetting and Subsequent Annealing","authors":"P. N. Medvedev,&nbsp;S. A. Naprienko,&nbsp;O. S. Kashapov,&nbsp;E. V. Filonova","doi":"10.1134/S2075113322060168","DOIUrl":"10.1134/S2075113322060168","url":null,"abstract":"<div><div><p><b>Abstract</b>—A study was made of the structure of a VT41 titanium alloy (Ti–Al–Si–Zr–Sn + β stabilizers) subjected to hot upsetting in the (α + β) region, i.e., under conditions simulating the forging process of a disk used for a gas turbine engine (GTE). It reveals the features of the textural state formation of primary and secondary globular grains, as well as the kinetics of their dissolution with increasing annealing temperature. The homogeneity of the billet structure resulting from heat treatment at 995°C increases substantially compared to the deformed state, which is related to the recrystallization of lamellar and small-globular grains and the retention of primary globular grains of the α phase. The sequence of structural changes upon heating is determined in the annealing temperature range from 950 to 1040°C.</p></div></div>","PeriodicalId":586,"journal":{"name":"Inorganic Materials: Applied Research","volume":"13 6","pages":"1499 - 1505"},"PeriodicalIF":0.75,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4378141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of the Unirradiated Weld Metal of the VVER-440 Reactor Vessel after 45 Years of Operation","authors":"K. I. Medvedev,&nbsp;D. Yu. Erak,&nbsp;A. A. Chernobaeva,&nbsp;D. A. Zhurko,&nbsp;V. N. Kochkin,&nbsp;M. A. Skundin,&nbsp;S. A. Bubyakin,&nbsp;N. V. Pal,&nbsp;A. A. Reshetnikov","doi":"10.1134/S2075113322060156","DOIUrl":"10.1134/S2075113322060156","url":null,"abstract":"<div><div><p><b>Abstract</b>—The results of studying the mechanical characteristics and chemical composition of metal specimens cut from an unirradiated weld joint of a VVER-440 reactor pressure vessel (RPV) after 45 years of operation are given. The calculated distribution of the ductile-to-brittle transition temperature over the thickness of the irradiated weld joint of the VVER-440 reactor pressure vessel (140 mm) is obtained accounting for the distribution of the initial properties, the content of phosphorus and copper, and the density of the fast neutron flux over the thickness of the joint. Since all the circular welds connecting the shells in the VVER-440 RPV are made using the same technology, the results of studying the unirradiated weld can be used to assess the distribution of properties in the irradiated weld. At the same time, it is assumed that the effect of thermal aging at a temperature of 270°C (operating temperature of a unirradiated weld) is insignificant and can be neglected.</p></div></div>","PeriodicalId":586,"journal":{"name":"Inorganic Materials: Applied Research","volume":"13 6","pages":"1727 - 1735"},"PeriodicalIF":0.75,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4015535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On the Fatigue Strength Calculation of Welded Shell Structures Made of High-Strength Steels under Low-Cycle Loading: Part 1. Estimation at the Initial Stage of Fatigue Failure","authors":"A. V. Ilyin,&nbsp;K. E. Sadkin,&nbsp;N. S. Zabavichev","doi":"10.1134/S2075113322060090","DOIUrl":"10.1134/S2075113322060090","url":null,"abstract":"<div><div><p><b>Abstract</b>—Current regulatory procedures for calculation of the fatigue strength of welded joints are of limited use for low-cycle loads and, typically, do not consider a possible variation in the asymmetry of the operating stress cycle, differences in the expected level of residual stresses, and a variety of possible joint geometries. Estimation procedures for shell structures made of high-strength steels exposed to external and internal pressure loadings were developed using experimental data on the resistance to fatigue fracture, as well as by physical simulation of individual stages of fatigue failure and summarization of data from numerical finite element studies of the stress-strain state.</p></div></div>","PeriodicalId":586,"journal":{"name":"Inorganic Materials: Applied Research","volume":"13 6","pages":"1666 - 1682"},"PeriodicalIF":0.75,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4016457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}