Pub Date : 2022-12-01DOI: 10.22226/2410-3535-2022-4-420-423
Regina Latypova, D. Kabirova, Nafis Khayretdinov, R. Fazlyakhmetov, M. Imayev
{"title":"Microhardness of eutectic Al-Si alloy after friction stir processing and annealing","authors":"Regina Latypova, D. Kabirova, Nafis Khayretdinov, R. Fazlyakhmetov, M. Imayev","doi":"10.22226/2410-3535-2022-4-420-423","DOIUrl":"https://doi.org/10.22226/2410-3535-2022-4-420-423","url":null,"abstract":"","PeriodicalId":45792,"journal":{"name":"Letters on Materials","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47596063","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":null,"pages":null},"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}
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":null,"pages":null},"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: 10.22226/2410-3535-2022-4-414-419
E. Naydenkin, I. Ratochka, I. Mishin, O. Lykova, O. Zabudchenko
{"title":"The effect of preliminary treatment with subsequent aging on structural-phase state and mechanical properties of β titanium alloy","authors":"E. Naydenkin, I. Ratochka, I. Mishin, O. Lykova, O. Zabudchenko","doi":"10.22226/2410-3535-2022-4-414-419","DOIUrl":"https://doi.org/10.22226/2410-3535-2022-4-414-419","url":null,"abstract":"","PeriodicalId":45792,"journal":{"name":"Letters on Materials","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46116683","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: 10.22226/2410-3535-2022-4-451-456
N. Polekhina, Valeriya Linnik, I. Litovchenko, K. Almaeva, V. Chernov, M. Leontieva-Smirnova
{"title":"Fracture features of impact samples of low-activation ferritic-martensitic steel EK-181 after high-temperature thermomechanical treatment","authors":"N. Polekhina, Valeriya Linnik, I. Litovchenko, K. Almaeva, V. Chernov, M. Leontieva-Smirnova","doi":"10.22226/2410-3535-2022-4-451-456","DOIUrl":"https://doi.org/10.22226/2410-3535-2022-4-451-456","url":null,"abstract":"","PeriodicalId":45792,"journal":{"name":"Letters on Materials","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47814186","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: 10.22226/2410-3535-2022-4-493-498
G. Klevtsov, R. Valiev, M. Fesenyuk, N. Klevtsova, M. Tyurkov, A. Matchin, Evgeniy Nosov
{"title":"Strength and fracture mechanism of nanostructured metal materials for medical applications","authors":"G. Klevtsov, R. Valiev, M. Fesenyuk, N. Klevtsova, M. Tyurkov, A. Matchin, Evgeniy Nosov","doi":"10.22226/2410-3535-2022-4-493-498","DOIUrl":"https://doi.org/10.22226/2410-3535-2022-4-493-498","url":null,"abstract":"","PeriodicalId":45792,"journal":{"name":"Letters on Materials","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43079449","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: 10.22226/2410-3535-2022-4-388-393
E. Avtokratova, O. Sitdikov, Rinat Zagitov, M. Markushev
{"title":"Effect of homogenization on the structure, hardness and corrosion resistance of 1570C alloy","authors":"E. Avtokratova, O. Sitdikov, Rinat Zagitov, M. Markushev","doi":"10.22226/2410-3535-2022-4-388-393","DOIUrl":"https://doi.org/10.22226/2410-3535-2022-4-388-393","url":null,"abstract":"","PeriodicalId":45792,"journal":{"name":"Letters on Materials","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46657970","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: 10.22226/2410-3535-2022-4-276-281
V. Danilenko, L. Kiekkuzhina, N. Parkhimovich, D. Gunderov
{"title":"Effect of annealing on the structure and phase composition of Cu-Al composite produced by conventional and accumulative HPT","authors":"V. Danilenko, L. Kiekkuzhina, N. Parkhimovich, D. Gunderov","doi":"10.22226/2410-3535-2022-4-276-281","DOIUrl":"https://doi.org/10.22226/2410-3535-2022-4-276-281","url":null,"abstract":"","PeriodicalId":45792,"journal":{"name":"Letters on Materials","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42481557","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: 10.22226/2410-3535-2022-4-428-432
N. Lezhnin, A. Makarov, E. Volkova, Andrey Valiullin, A. Kotelnikov, A. Vopneruk
{"title":"Realizing ultrafine grain structure of Cu-Cr-Zr alloy via friction stir welding / processing","authors":"N. Lezhnin, A. Makarov, E. Volkova, Andrey Valiullin, A. Kotelnikov, A. Vopneruk","doi":"10.22226/2410-3535-2022-4-428-432","DOIUrl":"https://doi.org/10.22226/2410-3535-2022-4-428-432","url":null,"abstract":"","PeriodicalId":45792,"journal":{"name":"Letters on Materials","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49290298","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: 10.22226/2410-3535-2022-4-394-398
S. Akkuzin, I. Litovchenko, A. Kim, E. Moskvichev, V. Chernov
{"title":"Microstructure and mechanical properties of austenitic steel EK-164 after warm rolling","authors":"S. Akkuzin, I. Litovchenko, A. Kim, E. Moskvichev, V. Chernov","doi":"10.22226/2410-3535-2022-4-394-398","DOIUrl":"https://doi.org/10.22226/2410-3535-2022-4-394-398","url":null,"abstract":"","PeriodicalId":45792,"journal":{"name":"Letters on Materials","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47377874","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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