Pub Date : 2022-12-01DOI: 10.22226/2410-3535-2022-4-367-372
N. Zhuk, A. Popov, R. Korolev, Viktor Moroz, A. Selyutin, A. Koroleva, N. Sekushin, B. Makeev
{"title":"Optical and electrical properties of a new complex oxide Pb1 / 3Na1 / 3K1 / 3Ta2 / 3Fe1 / 3O3-δ with perovskite structure","authors":"N. Zhuk, A. Popov, R. Korolev, Viktor Moroz, A. Selyutin, A. Koroleva, N. Sekushin, B. Makeev","doi":"10.22226/2410-3535-2022-4-367-372","DOIUrl":"https://doi.org/10.22226/2410-3535-2022-4-367-372","url":null,"abstract":"","PeriodicalId":45792,"journal":{"name":"Letters on Materials","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41611514","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 : 2022-12-01DOI: 10.22226/2410-3535-2022-4-373-378
O. Biryukova, A. Pesin, D. Pustovoitov
{"title":"Experience in obtaining laminated aluminum composites by asymmetric accumulative roll bonding","authors":"O. Biryukova, A. Pesin, D. Pustovoitov","doi":"10.22226/2410-3535-2022-4-373-378","DOIUrl":"https://doi.org/10.22226/2410-3535-2022-4-373-378","url":null,"abstract":"","PeriodicalId":45792,"journal":{"name":"Letters on Materials","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43094992","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 : 2022-12-01DOI: 10.22226/2410-3535-2022-4-343-349
L. Shaikhutdinova, V. Imayev, D. Trofimov, R. Imayev
{"title":"The effect of alloying and fluorination on the oxidation behavior of β-solidifying γ-TiAl based alloys","authors":"L. Shaikhutdinova, V. Imayev, D. Trofimov, R. Imayev","doi":"10.22226/2410-3535-2022-4-343-349","DOIUrl":"https://doi.org/10.22226/2410-3535-2022-4-343-349","url":null,"abstract":"","PeriodicalId":45792,"journal":{"name":"Letters on Materials","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47528947","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 : 2022-12-01DOI: 10.22226/2410-3535-2022-4-499-503
A. Sarkeeva
Titanium near-alpha alloy Ti-6Аl-2Zr-1.2Мо-1.3V was used to manufacture a multilayer laminate by diffusion bonding. The laminate consisted of thirteen sheets stacked relative to each other in a way that they all had common rolling direction. The influence of cutting orientation of specimens on the mechanical behavior under impact loading of the laminate was determined. The results of quantitative assessment of the impact fracture characteristics for the studied specimens was analyzed. The transverse specimens had a higher impact strength value in comparison to the longitudinal specimens. The results of fractographic studies showed the presence of minor delaminations on the surfaces of fractured specimens.
{"title":"Impact fracture characteristics of multilayer laminate based on near-alpha titanium alloy","authors":"A. Sarkeeva","doi":"10.22226/2410-3535-2022-4-499-503","DOIUrl":"https://doi.org/10.22226/2410-3535-2022-4-499-503","url":null,"abstract":"Titanium near-alpha alloy Ti-6Аl-2Zr-1.2Мо-1.3V was used to manufacture a multilayer laminate by diffusion bonding. The laminate consisted of thirteen sheets stacked relative to each other in a way that they all had common rolling direction. The influence of cutting orientation of specimens on the mechanical behavior under impact loading of the laminate was determined. The results of quantitative assessment of the impact fracture characteristics for the studied specimens was analyzed. The transverse specimens had a higher impact strength value in comparison to the longitudinal specimens. The results of fractographic studies showed the presence of minor delaminations on the surfaces of fractured specimens.","PeriodicalId":45792,"journal":{"name":"Letters on Materials","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45341195","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 : 2022-12-01DOI: 10.22226/2410-3535-2022-4-409-413
M. Markushev, I. Valeev, E. Avtokratova, R. Ilyasov, A. Valeeva, S. Krimsky, O. Sitdikov
{"title":"Effect of strain of cryorolling on structure and strength of nickel","authors":"M. Markushev, I. Valeev, E. Avtokratova, R. Ilyasov, A. Valeeva, S. Krimsky, O. Sitdikov","doi":"10.22226/2410-3535-2022-4-409-413","DOIUrl":"https://doi.org/10.22226/2410-3535-2022-4-409-413","url":null,"abstract":"","PeriodicalId":45792,"journal":{"name":"Letters on Materials","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41399686","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 : 2022-12-01DOI: 10.22226/2410-3535-2022-4-480-485
N. Zakharov, Irina Tikhonova, Yuri Zakharov, A. Popova, V. Pugachev, D. Russakov
{"title":"Study of the Pt-rich nanostructured FePt and CoPt alloys: oddities of phase composition","authors":"N. Zakharov, Irina Tikhonova, Yuri Zakharov, A. Popova, V. Pugachev, D. Russakov","doi":"10.22226/2410-3535-2022-4-480-485","DOIUrl":"https://doi.org/10.22226/2410-3535-2022-4-480-485","url":null,"abstract":"","PeriodicalId":45792,"journal":{"name":"Letters on Materials","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47663741","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 : 2022-12-01DOI: 10.22226/2410-3535-2022-4-332-335
M. Shagiev, A. Kruglov, O. Rudenko, M. Murzinova
{"title":"Superplastic forming of titanium alloys at 700°C","authors":"M. Shagiev, A. Kruglov, O. Rudenko, M. Murzinova","doi":"10.22226/2410-3535-2022-4-332-335","DOIUrl":"https://doi.org/10.22226/2410-3535-2022-4-332-335","url":null,"abstract":"","PeriodicalId":45792,"journal":{"name":"Letters on Materials","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46310188","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 : 2022-12-01DOI: 10.22226/2410-3535-2022-4-336-342
V. Chebodaeva, M. Sedelnikova, A. Kashin, O. Bakina, I. Khlusov, A. Zharin, V. Egorkin, I. Vyaliy, Y. Sharkeev
The effect of the introduction of charged aluminum oxyhydroxide (AO) nanoparticles into the porous coatings from calcium phosphate formed by micro-arc oxidation on their electrical potential and structure was studied. The modification resulted in changes in the morphology and elemental composition of the coatings. The selection of coating functionalization parameters resulted in obtaining homogeneously distributed aluminum oxyhydroxide nanoparticles in the form of agglomerates, providing the maximum change in the electrical potential of the coatings. An increase in the duration of ultrasonic dispersion (USD) of initial AlN powder suspension from 10 to 60 min and an increase in the surface roughness of the coatings, parameter R a , from 3.5 to 5.5 µm led to an increase in the surface electrical potential from −85 to −35 mV. At the same time, the aluminum content in the coating decreased from 3 to 1 at.% with an increase in the duration of USD of the AlN powder suspension from 10 to 60 minutes. The introduction of aluminum oxyhydroxide nanoparticles into the coating contributed to an improvement in corrosion properties, namely, an increase in the corrosion potential from 0.1 to 0.2 mV and a decrease in the corrosion current from 2.5 ∙10 −9 to 1.1·10 −9 A ∙ cm 2 .
{"title":"Structure and electrical potential of calcium phosphate coatings modified with aluminum oxyhydroxide nanoparticles","authors":"V. Chebodaeva, M. Sedelnikova, A. Kashin, O. Bakina, I. Khlusov, A. Zharin, V. Egorkin, I. Vyaliy, Y. Sharkeev","doi":"10.22226/2410-3535-2022-4-336-342","DOIUrl":"https://doi.org/10.22226/2410-3535-2022-4-336-342","url":null,"abstract":"The effect of the introduction of charged aluminum oxyhydroxide (AO) nanoparticles into the porous coatings from calcium phosphate formed by micro-arc oxidation on their electrical potential and structure was studied. The modification resulted in changes in the morphology and elemental composition of the coatings. The selection of coating functionalization parameters resulted in obtaining homogeneously distributed aluminum oxyhydroxide nanoparticles in the form of agglomerates, providing the maximum change in the electrical potential of the coatings. An increase in the duration of ultrasonic dispersion (USD) of initial AlN powder suspension from 10 to 60 min and an increase in the surface roughness of the coatings, parameter R a , from 3.5 to 5.5 µm led to an increase in the surface electrical potential from −85 to −35 mV. At the same time, the aluminum content in the coating decreased from 3 to 1 at.% with an increase in the duration of USD of the AlN powder suspension from 10 to 60 minutes. The introduction of aluminum oxyhydroxide nanoparticles into the coating contributed to an improvement in corrosion properties, namely, an increase in the corrosion potential from 0.1 to 0.2 mV and a decrease in the corrosion current from 2.5 ∙10 −9 to 1.1·10 −9 A ∙ cm 2 .","PeriodicalId":45792,"journal":{"name":"Letters on Materials","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44656192","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 : 2022-12-01DOI: 10.22226/2410-3535-2022-4-309-315
R. Salikhov, I. Mullagaliev, B. Badretdinov, Anastasia Ostaltsova, T. Sadykov, A. Mustafin
{"title":"Effect of the morphology of films of polyaniline derivatives poly-2-[(2E)-1‑methyl-2‑butene-1‑yl]aniline and poly-2-(cyclohex-2‑en-1‑yl)aniline on sensory sensitivity to humidity and ammonia vapors","authors":"R. Salikhov, I. Mullagaliev, B. Badretdinov, Anastasia Ostaltsova, T. Sadykov, A. Mustafin","doi":"10.22226/2410-3535-2022-4-309-315","DOIUrl":"https://doi.org/10.22226/2410-3535-2022-4-309-315","url":null,"abstract":"","PeriodicalId":45792,"journal":{"name":"Letters on Materials","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45928063","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 : 2022-12-01DOI: 10.22226/2410-3535-2022-4-354-359
A. Nikonov, D. Lychagin, A. Bibko, O. Novitskaya
In additive manufacturing, it is important to determine the technological and structural factors that control the crystallization process and specify the required structure of the product. The crystallization structure is affected by the parameters of the starting material and the crystallization conditions. Using the orientation of the grains of the substrate, which is formed after electron-beam surfacing of aluminum bronze, the modeling parameters were set by the molecular dynamics simulation. The process of deformation of three adjacent grains under constrained conditions and structural changes in the process of interaction with a melt drop and subsequent crystallization were considered. An analysis of grain deformation made it possible to reveal the role of geometric shear stress concentrators and to determine the significance of constrained conditions for deformation of polycrystal grains. It has been established that under the influence of a drop of melt, stacking faults are the least thermally stable, and twins are the most stable. The crystallographic orientation of the crystallizing grains coincides with the orientation of the substrate grains. During crystallization, columnar grains continue to grow, in which stacking faults and twins are formed.
{"title":"Simulation of deformation and growth during surfacing of aluminum bronze nanograins","authors":"A. Nikonov, D. Lychagin, A. Bibko, O. Novitskaya","doi":"10.22226/2410-3535-2022-4-354-359","DOIUrl":"https://doi.org/10.22226/2410-3535-2022-4-354-359","url":null,"abstract":"In additive manufacturing, it is important to determine the technological and structural factors that control the crystallization process and specify the required structure of the product. The crystallization structure is affected by the parameters of the starting material and the crystallization conditions. Using the orientation of the grains of the substrate, which is formed after electron-beam surfacing of aluminum bronze, the modeling parameters were set by the molecular dynamics simulation. The process of deformation of three adjacent grains under constrained conditions and structural changes in the process of interaction with a melt drop and subsequent crystallization were considered. An analysis of grain deformation made it possible to reveal the role of geometric shear stress concentrators and to determine the significance of constrained conditions for deformation of polycrystal grains. It has been established that under the influence of a drop of melt, stacking faults are the least thermally stable, and twins are the most stable. The crystallographic orientation of the crystallizing grains coincides with the orientation of the substrate grains. During crystallization, columnar grains continue to grow, in which stacking faults and twins are formed.","PeriodicalId":45792,"journal":{"name":"Letters on Materials","volume":"125 ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41282414","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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