Pub Date : 2024-07-03DOI: 10.3103/s0967091224700244
V. V. Mukhin
Abstract
The results of experimental studies of epoxy polymer before and after exposure in the climate chamber at high humidity are presented. The mean values of tensile and shear strength as well as the values of standard deviation and coefficient of variation have been determined. It has been found that the injection of dispersed fillers that consist of a mixture of aluminum powder and carbon-containing powder into the epoxy polymer composition makes it possible to reduce the coefficient of variation by 40%. The long-term exposure of epoxy polymer samples in a humid environment led to a slight decrease in the mechanical properties (6%) as well as to a significant increase in the standard deviation (by more than 65%) and the variation coefficient (by 77%).
{"title":"Technique to Estimate the Properties of Epoxy Composite Materials Used in a Humid Environment","authors":"V. V. Mukhin","doi":"10.3103/s0967091224700244","DOIUrl":"https://doi.org/10.3103/s0967091224700244","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The results of experimental studies of epoxy polymer before and after exposure in the climate chamber at high humidity are presented. The mean values of tensile and shear strength as well as the values of standard deviation and coefficient of variation have been determined. It has been found that the injection of dispersed fillers that consist of a mixture of aluminum powder and carbon-containing powder into the epoxy polymer composition makes it possible to reduce the coefficient of variation by 40%. The long-term exposure of epoxy polymer samples in a humid environment led to a slight decrease in the mechanical properties (6%) as well as to a significant increase in the standard deviation (by more than 65%) and the variation coefficient (by 77%).</p>","PeriodicalId":21903,"journal":{"name":"Steel in Translation","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551085","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}
Pub Date : 2024-07-03DOI: 10.3103/s0967091224700207
Yu. A. Mayants, K. V. Polikarpov
Abstract
The widespread introduction of new polymer and composite materials, as well as a number of technological processes, for example, those associated with cold bending of pipes, faces difficulties in engineering calculations, which is due to the nonlinearity of the deformation diagram in the area of working loads. This article presents the derivation of equations for determining the real elastic bending characteristics of materials with a nonlinear deformation diagram based on an analysis of the dependence of the displacement of the point of application of force on its magnitude during cantilever or three-point bending of beams. The obtained equations can be used in calculations of elastoplastic bending of metal elements of structures and bending of structures made of polymer and composite materials.
{"title":"Study of Bending of Beams Made of Material with a Nonlinear Deformation Diagram","authors":"Yu. A. Mayants, K. V. Polikarpov","doi":"10.3103/s0967091224700207","DOIUrl":"https://doi.org/10.3103/s0967091224700207","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The widespread introduction of new polymer and composite materials, as well as a number of technological processes, for example, those associated with cold bending of pipes, faces difficulties in engineering calculations, which is due to the nonlinearity of the deformation diagram in the area of working loads. This article presents the derivation of equations for determining the real elastic bending characteristics of materials with a nonlinear deformation diagram based on an analysis of the dependence of the displacement of the point of application of force on its magnitude during cantilever or three-point bending of beams. The obtained equations can be used in calculations of elastoplastic bending of metal elements of structures and bending of structures made of polymer and composite materials.</p>","PeriodicalId":21903,"journal":{"name":"Steel in Translation","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551029","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}
Pub Date : 2024-07-03DOI: 10.3103/s0967091224700141
I. K. Arkhipov, V. I. Abramova, O. M. Gubanov, A. E. Gvozdev, S. N. Kutepov
Abstract
The relationships between stresses and strains in metal porous composites manufactured using 3D technologies, as well as in dispersion-strengthened polymer composites with a hereditary relaxation or creep core, are considered. By applying the Volterra matching principle using the Laplace transform, the effective viscoelastic properties of the composite are calculated in the images. The originals of these characteristics were obtained by inverse transformations using the standard operational calculus method. For composites with a polymer matrix, the Yu.N. Rabotnov method of integral operators is used. As a result, effective stress relaxation characteristics were obtained for metal composites. For polymer composites, an effective law of creep under uniaxial loading was obtained. The theoretical results on creep were compared with similar experimental results.
{"title":"Effective Viscoelastic Properties of Metal and Polymer Composites","authors":"I. K. Arkhipov, V. I. Abramova, O. M. Gubanov, A. E. Gvozdev, S. N. Kutepov","doi":"10.3103/s0967091224700141","DOIUrl":"https://doi.org/10.3103/s0967091224700141","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The relationships between stresses and strains in metal porous composites manufactured using 3D technologies, as well as in dispersion-strengthened polymer composites with a hereditary relaxation or creep core, are considered. By applying the Volterra matching principle using the Laplace transform, the effective viscoelastic properties of the composite are calculated in the images. The originals of these characteristics were obtained by inverse transformations using the standard operational calculus method. For composites with a polymer matrix, the Yu.N. Rabotnov method of integral operators is used. As a result, effective stress relaxation characteristics were obtained for metal composites. For polymer composites, an effective law of creep under uniaxial loading was obtained. The theoretical results on creep were compared with similar experimental results.</p>","PeriodicalId":21903,"journal":{"name":"Steel in Translation","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551089","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}
Pub Date : 2024-07-03DOI: 10.3103/s0967091224700256
M. E. Stavrovskii, M. I. Sidorov, I. N. Kravchenko, A. V. Ragutkin, I. A. Aleksandrov, D. M. Bodunov, V. M. Korneev
Abstract
In this paper, we consider issues of the kinetic theory of strength and the effect of temperature and force factors on the damage accumulation in materials. Phenomenological models of the formation and propagation of defects structures determine the strength, anticorrosion, tribological properties of materials, and the nature manifestations of destruction processes during operation. The selection and verification of a material behavior model makes it possible to apply reasonably methods to improve their performance and protect against corrosion.
{"title":"Topochemical Reactions in the Destruction Kinetics of Materials","authors":"M. E. Stavrovskii, M. I. Sidorov, I. N. Kravchenko, A. V. Ragutkin, I. A. Aleksandrov, D. M. Bodunov, V. M. Korneev","doi":"10.3103/s0967091224700256","DOIUrl":"https://doi.org/10.3103/s0967091224700256","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In this paper, we consider issues of the kinetic theory of strength and the effect of temperature and force factors on the damage accumulation in materials. Phenomenological models of the formation and propagation of defects structures determine the strength, anticorrosion, tribological properties of materials, and the nature manifestations of destruction processes during operation. The selection and verification of a material behavior model makes it possible to apply reasonably methods to improve their performance and protect against corrosion.</p>","PeriodicalId":21903,"journal":{"name":"Steel in Translation","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551086","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}
Pub Date : 2024-07-03DOI: 10.3103/s0967091224700165
V. O. Startsev, M. A. Gorbovets, E. O. Valevin, A. A. Skirta, O. V. Startsev
Abstract
The results of studies of the corrosion resistance of aircraft-grade aluminum alloys after two years of exposure to the coastal atmosphere of the moderately warm climate of Gelendzhik and the tropical climate of Wanning (Hainan Island, China) are presented. It is shown that the corrosive aggressiveness of the Gelendzhik atmosphere due to the location of the test beds in close proximity to the coastline and the more active influence of marine chlorides and sulfates is comparable to the corrosive aggressiveness of a tropical station. The emerging corrosion damage does not affect the tensile strength and yield strength of the materials under study, but reduce the relative uniform elongation of some of the studied alloys.
{"title":"Comparison of Corrosion Resistance of Aviation Aluminum Alloys in the Coastal Atmosphere of Moderately Warm and Humid Tropical Climates","authors":"V. O. Startsev, M. A. Gorbovets, E. O. Valevin, A. A. Skirta, O. V. Startsev","doi":"10.3103/s0967091224700165","DOIUrl":"https://doi.org/10.3103/s0967091224700165","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The results of studies of the corrosion resistance of aircraft-grade aluminum alloys after two years of exposure to the coastal atmosphere of the moderately warm climate of Gelendzhik and the tropical climate of Wanning (Hainan Island, China) are presented. It is shown that the corrosive aggressiveness of the Gelendzhik atmosphere due to the location of the test beds in close proximity to the coastline and the more active influence of marine chlorides and sulfates is comparable to the corrosive aggressiveness of a tropical station. The emerging corrosion damage does not affect the tensile strength and yield strength of the materials under study, but reduce the relative uniform elongation of some of the studied alloys.</p>","PeriodicalId":21903,"journal":{"name":"Steel in Translation","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551091","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}
Pub Date : 2024-07-03DOI: 10.3103/s0967091224700153
P. I. Malenko, O. B. Kryuchkov, A. E. Boldyrev
Abstract
The article discusses the factors ensuring high wear resistance and antifriction properties of nicotrated heat-resistant structural steels under conditions of sliding friction in a saturated KCl solution. It is revealed that corrosion-resistant elements do not provide high strength characteristics of steels and do not help reduce the rate of corrosion-mechanical wear. It is shown that the wear destruction of steels is mainly determined by the ploughing effect, and with an increase in the strength properties of steels, there is a transition from the ploughing effect to the peeling effect.
{"title":"Study of Structure and Corrosion Resistance of Abraded Surfaces of Heat-Resistant Structural Steels","authors":"P. I. Malenko, O. B. Kryuchkov, A. E. Boldyrev","doi":"10.3103/s0967091224700153","DOIUrl":"https://doi.org/10.3103/s0967091224700153","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The article discusses the factors ensuring high wear resistance and antifriction properties of nicotrated heat-resistant structural steels under conditions of sliding friction in a saturated KCl solution. It is revealed that corrosion-resistant elements do not provide high strength characteristics of steels and do not help reduce the rate of corrosion-mechanical wear. It is shown that the wear destruction of steels is mainly determined by the ploughing effect, and with an increase in the strength properties of steels, there is a transition from the ploughing effect to the peeling effect.</p>","PeriodicalId":21903,"journal":{"name":"Steel in Translation","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551090","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}
Pub Date : 2024-07-03DOI: 10.3103/s0967091224700177
V. A. Skryabin
Abstract
The chemical-and-thermal treatment (CTT) of powder materials is considered used for the formation of the required structure and properties of the surface layer, for example, for an increase in the level of surface hardness, heat resistance, corrosion resistance, antifriction properties and wear resistance. The CTT operating parameters are presented and their effect on the structure and properties of powder materials is demonstrated.
{"title":"Chemical-and-Thermal Treatment of Powder Materials","authors":"V. A. Skryabin","doi":"10.3103/s0967091224700177","DOIUrl":"https://doi.org/10.3103/s0967091224700177","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The chemical-and-thermal treatment (CTT) of powder materials is considered used for the formation of the required structure and properties of the surface layer, for example, for an increase in the level of surface hardness, heat resistance, corrosion resistance, antifriction properties and wear resistance. The CTT operating parameters are presented and their effect on the structure and properties of powder materials is demonstrated.</p>","PeriodicalId":21903,"journal":{"name":"Steel in Translation","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551087","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}
Pub Date : 2024-07-03DOI: 10.3103/s0967091224700190
S. K. Sundukov
Abstract
The work describes the ultrasonic vibration mechanisms in the processes of producing permanent joints. Joints obtained by both molecular adhesion forces are considered: welded, soldered, adhesive-bonded, and mechanical joints, such as riveted and force fit joints. Products obtained by additive manufacturing are also considered, which makes it possible to replace the assembly operation by manufacturing the joint as a single entity.
{"title":"Ultrasonic Vibration Mechanism in Making Permanent Joints","authors":"S. K. Sundukov","doi":"10.3103/s0967091224700190","DOIUrl":"https://doi.org/10.3103/s0967091224700190","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The work describes the ultrasonic vibration mechanisms in the processes of producing permanent joints. Joints obtained by both molecular adhesion forces are considered: welded, soldered, adhesive-bonded, and mechanical joints, such as riveted and force fit joints. Products obtained by additive manufacturing are also considered, which makes it possible to replace the assembly operation by manufacturing the joint as a single entity.</p>","PeriodicalId":21903,"journal":{"name":"Steel in Translation","volume":"66 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551028","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}
Pub Date : 2024-07-03DOI: 10.3103/s0967091224700268
V. A. Skryabin
Abstract
Problems of improving the technology for the finishing-and-strengthening treatment of components in the course of their repair or manufacture, including the designing of multifunctional tools, are considered. Graphical dependences for optimal feeding Sopt on surface roughness Ra in the course of combined treatment for the case of different values of the cutter radius r, as well as graphical dependences for the optimal velocity Vopt on the optimum feeding Sopt for the case of different values of cutting depth t are presented. Comparative data for changing in the parameters of economic efficiency owing to the use of the combined treatment of a component by means of joint boring and rolling instead of a sequential treatment are presented.
摘要 研究了在部件维修或制造过程中改进部件精加工和强化处理技术的问题，包括多功能工具的设计。文中给出了不同刀具半径 r 值情况下组合处理过程中最佳进给量 Sopt 与表面粗糙度 Ra 的图表关系，以及不同切削深度 t 值情况下最佳速度 Vopt 与最佳进给量 Sopt 的图表关系。此外，还提供了采用联合镗削和轧制而不是顺序镗削的方式对部件进行联合处理时经济效益参数变化的比较数据。
{"title":"Improving the Technology for Product Finishing-and-Strengthening Treatment in the Course of Repairing or Manufacturing","authors":"V. A. Skryabin","doi":"10.3103/s0967091224700268","DOIUrl":"https://doi.org/10.3103/s0967091224700268","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Problems of improving the technology for the finishing-and-strengthening treatment of components in the course of their repair or manufacture, including the designing of multifunctional tools, are considered. Graphical dependences for optimal feeding <i>S</i><sub>opt</sub> on surface roughness <i>R</i><sub>a</sub> in the course of combined treatment for the case of different values of the cutter radius <i>r</i>, as well as graphical dependences for the optimal velocity <i>V</i><sub>opt</sub> on the optimum feeding <i>S</i><sub>opt</sub> for the case of different values of cutting depth <i>t</i> are presented. Comparative data for changing in the parameters of economic efficiency owing to the use of the combined treatment of a component by means of joint boring and rolling instead of a sequential treatment are presented.</p>","PeriodicalId":21903,"journal":{"name":"Steel in Translation","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551026","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}
Pub Date : 2024-03-21DOI: 10.3103/s096709122470013x
M. A. Polyakova, K. G. Pivovarova, A. E. Gulin
Abstract
The results of a study of the features of texture formation and spatial parameters of the surface of high-carbon steel wire after combined deformation treatment by drawing with alternating bending and torsion are presented. The obtained results indicate that the process of formation of a pronounced deformation texture with anisotropy of properties characteristic of drawing is observed in the processed wire.
{"title":"Features of Texture Formation of High-Carbon Steel Wire after Combined Deformation Treatment","authors":"M. A. Polyakova, K. G. Pivovarova, A. E. Gulin","doi":"10.3103/s096709122470013x","DOIUrl":"https://doi.org/10.3103/s096709122470013x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The results of a study of the features of texture formation and spatial parameters of the surface of high-carbon steel wire after combined deformation treatment by drawing with alternating bending and torsion are presented. The obtained results indicate that the process of formation of a pronounced deformation texture with anisotropy of properties characteristic of drawing is observed in the processed wire.</p>","PeriodicalId":21903,"journal":{"name":"Steel in Translation","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140198014","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}
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