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Effect of cryodeformation by high-pressure torsion on the fracture surface of Au-Co alloys 高压扭转低温变形对Au-Co合金断口形貌的影响
Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2022-12-01 DOI: 10.17804/2410-9908.2022.6.006-015
T. Tolmachev, V. Pilyugin, N. Nikolayeva, A. I. Ancharov, A. M. Patselov, Yu. V. Solov’eva, T. I. Chashchukhina, L. M. Voronova, M. V. Degtyarev
{"title":"Effect of cryodeformation by high-pressure torsion on the fracture surface of Au-Co alloys","authors":"T. Tolmachev, V. Pilyugin, N. Nikolayeva, A. I. Ancharov, A. M. Patselov, Yu. V. Solov’eva, T. I. Chashchukhina, L. M. Voronova, M. V. Degtyarev","doi":"10.17804/2410-9908.2022.6.006-015","DOIUrl":"https://doi.org/10.17804/2410-9908.2022.6.006-015","url":null,"abstract":"Au-Co alloys with limited solubility were synthesized by the high-pressure torsion in boiling nitrogen at various anvil revolutions. Au and Co were initially in the state of a powder mixture in an equiatomic ratio. The obtained alloys were subjected to SEM fractography and XRD analysis in transmission X-ray synchrotron radiation, depending on the amount of strain. It is shown that the morphology of the fracture surfaces of the synthesized alloy depends significantly on strain. It is revealed that the mutual mixing of the components increases with strain. The images of the fracture surfaces of the Au-Co alloys testify that, as the strain and the number of anvil revolutions increase, a transition from ductile fracture, with inclusions of brittle intergranular fracture, to uniformly ductile fracture is observed over the entire thickness of the sample. A further increase in the strain and the number of anvil revolutions corresponds to the transition from the ductile type of the fracture surface to the brittle one. In addition, the fractography of the Au-Co alloys has revealed that the relief of the fracture surface becomes more homogeneous and that the size of the structural elements of the fracture surface decreases with increasing strain.","PeriodicalId":11165,"journal":{"name":"Diagnostics, Resource and Mechanics of materials and structures","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73284981","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}
引用次数: 0
The effect of aluminum concentration on the structure evolution and mechanical properties of Cu/Al composites produced by electron-beam additive manufacturing 铝浓度对电子束增材制造Cu/Al复合材料组织演变和力学性能的影响
Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2022-12-01 DOI: 10.17804/2410-9908.2022.6.035-045
A. Panfilov, A. Zykova, A. Chumaevsky, V. Beloborodov, S. Nikonov, E. Kolubaev
{"title":"The effect of aluminum concentration on the structure evolution and mechanical properties of Cu/Al composites produced by electron-beam additive manufacturing","authors":"A. Panfilov, A. Zykova, A. Chumaevsky, V. Beloborodov, S. Nikonov, E. Kolubaev","doi":"10.17804/2410-9908.2022.6.035-045","DOIUrl":"https://doi.org/10.17804/2410-9908.2022.6.035-045","url":null,"abstract":"Electron-beam additive manufacturing with a simultaneous feed of two wires is used to produce Cu/Al composites with different contents of Al-12Si aluminum alloy. The obtained specimens are examined by optical microscopy and X-ray diffraction analysis and tested for uniaxial static tension. The introduction of 25 vol % Al-12Si is found to form a fairly homogeneous structure characterized by Cu dendrites and a small volume fraction of Cu9Al4 and Cu4Al intermetallic compounds on the dendritic cell boundaries. The increase of the volume fraction of Al-12Si in the copper alloy to 33 vol % is accompanied by the formation of Cu9Al4, Cu4Al, and Cu3Al intermetallics and an increase in their volume fraction. In the composite with 33 vol % Al-12Si, the Cu9Al4 phase becomes the main one, thus causing brittle fracture of the specimens without plastic deformation. It is shown that, with an increase in the volume fraction of Al-12Si to 30 %, ultimate strength increases significantly in the copper alloy (up to 695 MPa) and relative elongation decreases (down to 4 %) due to the increasing volume fraction of the brittle CuxAly intermetallic phases. The results of hardness measurements testify that the increase of Al-12Si content in the specimens from 25 to 33 vol % increases their microhardness significantly, namely from 1.38 to 4.35 GPa.","PeriodicalId":11165,"journal":{"name":"Diagnostics, Resource and Mechanics of materials and structures","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89546317","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}
引用次数: 0
Formation of intermetallic particles in an Fe-Ni-Al alloy during annealing and electron irradiation Fe-Ni-Al合金退火和电子辐照过程中金属间颗粒的形成
Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2022-12-01 DOI: 10.17804/2410-9908.2022.6.107-116
S. Danilov
{"title":"Formation of intermetallic particles in an Fe-Ni-Al alloy during annealing and electron irradiation","authors":"S. Danilov","doi":"10.17804/2410-9908.2022.6.107-116","DOIUrl":"https://doi.org/10.17804/2410-9908.2022.6.107-116","url":null,"abstract":"The behavior of intermetallic nanoparticles, such as Ni3Al, and vacancy defects in an fcc Fe-Ni-Al alloy during annealing and electron irradiation is studied by measuring residual resistivity. It is shown that, during annealing at early stages, Ni3Al zones are formed in the quenched Fe-Ni-Al alloy, which increase residual electrical resistance, and during annealing above 700 K, nanosized (~4.5 nm) intermetallic precipitates are formed from them, uniformly distributed in the alloy matrix, whose growth leads to a decrease in residual resistivity. Under irradiation at room temperature, vacancy defects accumulate in the alloy in the form of vacancy complexes. The dissociation of these complexes at about 400 K causes the appearance of freely migrating vacancies and enhances self-diffusion forming Ni3Al bands. At about 600 to 700 K, the solid solution is decomposed thermally. At higher temperatures, the formation of intermetallic particles occurs, which is characterized by a decrease in electrical resistance.","PeriodicalId":11165,"journal":{"name":"Diagnostics, Resource and Mechanics of materials and structures","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81909006","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}
引用次数: 0
Obtaining a steel-based metal matrix composite by wire-feed additive electron beam manufacturing with the introduction of tungsten powder 引入钨粉，采用线喂添加剂电子束法制备钢基金属基复合材料
Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2022-12-01 DOI: 10.17804/2410-9908.2022.6.076-085
A. Chumaevsky, N. Shamarin, A. Panfilov, A. Zykova, A. Filippov, E. Moskvichev, V. Е. Rubtsov, E. Kolubaev
{"title":"Obtaining a steel-based metal matrix composite by wire-feed additive electron beam manufacturing with the introduction of tungsten powder","authors":"A. Chumaevsky, N. Shamarin, A. Panfilov, A. Zykova, A. Filippov, E. Moskvichev, V. Е. Rubtsov, E. Kolubaev","doi":"10.17804/2410-9908.2022.6.076-085","DOIUrl":"https://doi.org/10.17804/2410-9908.2022.6.076-085","url":null,"abstract":"Wire-feed electron-beam additive technology is used to produce samples of a composite material based on the 40Cr9Si2 steel by additionally introducing tungsten powder during printing. Controlling the feed of wire and powder makes it possible to form composite structures in the surface layers of the samples while maintaining the sample bulks with high strength and plasticity. The content of tungsten in the surface layer increases smoothly. This has a positive effect on the structure of the samples and prevents cracking or delamination at the boundary between the base metal and the surface layer. The tensile strength of the layers decreases with the introduction of tungsten in comparison with the bulk of the sample. In this case, the surface layers are characterized by a multiple increase in wear resistance, especially at elevated test temperatures.","PeriodicalId":11165,"journal":{"name":"Diagnostics, Resource and Mechanics of materials and structures","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78568715","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}
引用次数: 0
The effect of boron on the protective properties of aluminide coatings 硼对铝化物涂层防护性能的影响
Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2022-12-01 DOI: 10.17804/2410-9908.2022.6.025-034
N. B. Pugacheva, P. Polyakov
{"title":"The effect of boron on the protective properties of aluminide coatings","authors":"N. B. Pugacheva, P. Polyakov","doi":"10.17804/2410-9908.2022.6.025-034","DOIUrl":"https://doi.org/10.17804/2410-9908.2022.6.025-034","url":null,"abstract":"The effect of the formation, microstructure, phase composition, and protective properties of diffusion aluminide coatings alloyed with boron on the EI69 heat-resistant steel and the EI929 nickel alloy is studied. In the course of saturation, boron easily diffuses over the interstices of the B2 crystal lattice of aluminides, thus forming interstitial solid solutions. In this case, the Al content in the coating decreases, thereby implementing the possibility of increasing the plasticity of the coating while maintaining high protective properties. By binding refractory corrosive elements (Mo, W, Nb, etc.) into corrosion-resistant borides, boron increases the overall resistance of the coating in molten Na2SO4 and NaCl salts at 700 °C by an order of magnitude and improves the resistance of the surface to erosion wear. This makes it possible to recommend Al-Si-B coatings to be used for protecting the surface of the turbine blades of supercharging turbochargers and diesel exhaust valves.","PeriodicalId":11165,"journal":{"name":"Diagnostics, Resource and Mechanics of materials and structures","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76317862","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}
引用次数: 0
Phonon instabilities in a metal on the bain FCC–BCC transformation path 贝恩FCC-BCC转换路径上金属中的声子不稳定性
Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2022-12-01 DOI: 10.17804/2410-9908.2022.6.086-094
A. R. Kuznetsov, S. Starikov, V. Sagaradze
{"title":"Phonon instabilities in a metal on the bain FCC–BCC transformation path","authors":"A. R. Kuznetsov, S. Starikov, V. Sagaradze","doi":"10.17804/2410-9908.2022.6.086-094","DOIUrl":"https://doi.org/10.17804/2410-9908.2022.6.086-094","url":null,"abstract":"In this paper, the energy of the Bain path in Al and the instability of phonons during uniaxial compression deformation along <001> are studied ab initio. It is shown that, at a strain of about 15%, dynamic loss of structure stability is observed due to short-wavelength phonons, which thus determine the theoretical strength of Al. Deformation causes shifts along the {111} planes of the initial fcc cell, leading to the formation of stacking faults. A similar formation of stacking faults was observed in [1] in the framework of simulation of compression along the <001> Ni3Al nanoparticle (L12 superstructure based on the fcc structure). The results obtained can be applied to situations in the experiment, when small defect-free regions are deformed, for example, as in nanostructured materials and during nanoindentation.","PeriodicalId":11165,"journal":{"name":"Diagnostics, Resource and Mechanics of materials and structures","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77308299","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}
引用次数: 0
The effect of the multiplicity of frictional action on the micromechanical properties of NiCrBSi-coatings 多重摩擦作用对nicrbsi涂层微观力学性能的影响
Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2022-10-01 DOI: 10.17804/2410-9908.2022.5.050-059
N. Soboleva, N. A. Davydova, A. Makarov
{"title":"The effect of the multiplicity of frictional action on the micromechanical properties of NiCrBSi-coatings","authors":"N. Soboleva, N. A. Davydova, A. Makarov","doi":"10.17804/2410-9908.2022.5.050-059","DOIUrl":"https://doi.org/10.17804/2410-9908.2022.5.050-059","url":null,"abstract":"The paper investigates the effect of the number of passes (1 or 2) of an indenter made of fine cubic boron nitride during friction treatment of PG-SR2 and PG-10N-01 NiCrBSi-coatings on the micromechanical properties of their surface layers. The friction treatment of the coating surface under all the process conditions studied, in comparison with the initial polished state, increases the strength characteristics of the coating surface layer and the parameters indicating the resistance of the material surface to elastic-plastic deformation. The effect of the number of indenter passes during surface friction treatment on the strength characteristics is found to be more significant for the softer and more ductile PG-SR2 coating than for the PG-10N-01 coating. This is attributed to the higher strain hardenability of the former.","PeriodicalId":11165,"journal":{"name":"Diagnostics, Resource and Mechanics of materials and structures","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72981447","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}
引用次数: 0
Studying the adhesion strength of plasma powder metal coatings on the surface of graphite 研究了等离子体粉末金属涂层在石墨表面的附着力
Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2022-10-01 DOI: 10.17804/2410-9908.2022.5.023-039
Yu. V. Nikolin, D. Vichuzhanin, N. Pugacheva, F. I. Mezin
{"title":"Studying the adhesion strength of plasma powder metal coatings on the surface of graphite","authors":"Yu. V. Nikolin, D. Vichuzhanin, N. Pugacheva, F. I. Mezin","doi":"10.17804/2410-9908.2022.5.023-039","DOIUrl":"https://doi.org/10.17804/2410-9908.2022.5.023-039","url":null,"abstract":"Coatings applied onto the surface of specimens made of UHP electrode graphite are studied. Coatings are applied by thermal spraying in two stages: spraying of a sublayer (layer I) of the powder materials being tested; spraying of the main layer of the plasma coating, consisting of a mechanical mixture of fine spherical aluminum (Al) and copper (CuCr1) powders in an equal volume ratio. The adhesion strength between the coating and the graphite surface is studied as dependent on the following factors: sublayer thickness; the type of preliminary surface preparation; the chemical composition of the powder material of the sublayer. It has been found that the highest adhesion strength between the coating and the graphite base is achieved when the sublayer thickness is 80 µm, when a thread with a depth of 1.0 mm is cut on the base surface, and when Al powder is used as a sublayer.","PeriodicalId":11165,"journal":{"name":"Diagnostics, Resource and Mechanics of materials and structures","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76437171","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}
引用次数: 0
Effect of friction treatment of the AISI 321 steel on changes in its hardness and magnetic characteristics AISI 321钢摩擦处理对其硬度和磁性变化的影响
Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2022-10-01 DOI: 10.17804/2410-9908.2022.5.040-049
E. Putilova, L. Goruleva, S. Zadvorkin
{"title":"Effect of friction treatment of the AISI 321 steel on changes in its hardness and magnetic characteristics","authors":"E. Putilova, L. Goruleva, S. Zadvorkin","doi":"10.17804/2410-9908.2022.5.040-049","DOIUrl":"https://doi.org/10.17804/2410-9908.2022.5.040-049","url":null,"abstract":"The friction treatment of corrosion-resistant metastable steels makes it possible to improve the strength properties and operational characteristics of such materials. This is mainly due to the formation of strain-induced martensite, a stronger ferromagnetic phase, in the surface layer. Besides, modification of the phase composition changes the magnetic state of the material. The paper presents the results of the effect of varying the normal load of the indenter during surface friction treatment on the change in the phase composition and the magnetic characteristics of the AISI 321 steel. The amount of the formed ferromagnetic phase and hardness are related to the normal load of the indenter. It is shown that magnetization can be used as an informative parameter for diagnosing the formation of strain-induced martensite during the friction treatment of the AISI 321 steel.","PeriodicalId":11165,"journal":{"name":"Diagnostics, Resource and Mechanics of materials and structures","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80137124","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}
引用次数: 1
Magnetically active coatings for electrical materials 电气材料用磁性活性涂层
Diagnostics, Resource and Mechanics of materials and structures Pub Date : 2022-10-01 DOI: 10.17804/2410-9908.2022.5.006-014
Yu. N. Dragoshanskii, V. Pudov
{"title":"Magnetically active coatings for electrical materials","authors":"Yu. N. Dragoshanskii, V. Pudov","doi":"10.17804/2410-9908.2022.5.006-014","DOIUrl":"https://doi.org/10.17804/2410-9908.2022.5.006-014","url":null,"abstract":"The prospects of using nitride-oxide and magnesium phosphate electrical insulating coatings on thin strips of magnetically soft alloys based on silicon iron are considered. X-ray diffraction topography, powder figures, and magnetic measurements have shown that coatings create uniformly distributed tensile stresses in materials, increase uniaxial magnetic anisotropy, and reduce the volume of transversely magnetized domains and the width of longitudinally magnetized ones. This increases magnetic permeability and significantly decreases the coercive force, as well as eddy-current and total (by 20–25 %) magnetic losses. Tensile (magnetically active) coatings enhance the effect of subsequent thermomagnetic treatment of alloys.","PeriodicalId":11165,"journal":{"name":"Diagnostics, Resource and Mechanics of materials and structures","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80920958","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}
引用次数: 0
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