Microstructure and mechanical behavior of UFG copper processed by ECAP following different processing regimes

Pürçek, G.; Saray, Onur; Nagimov, M. I.; Назаров, А. А.; Safarov, I. M.; Даниленко, В. Н.; Valiakhmetov, O. R.; Mulyukov, R. R.

doi:10.1080/14786435.2011.634842

Cited by 25 publications

(11 citation statements)

References 37 publications

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“…Yield stress as a function of equivalent strain for a) Al, b) Cu, and c) F138. Data from the present study (▪) and from the literature (♢) and a theoretical curve drawn using the flow equation with the fitting parameters suggested by Csanádi et al…”

Section: Resultsmentioning

confidence: 99%

“…Figure shows the experimental σ y data for AA1050 Al, Cu, and F138 together with literature data relative to the von Mises strain. This is superimposed on the flow relationship given by Equation .…”

Section: Resultsmentioning

confidence: 99%

“…Figure shows a good fit between the theoretical curve and experimental data for Cu and Al. Cu saturates hardness at lower strains, and according to a number of investigations, it takes longer to build up grains by SPD (in comparison to Al, twice as much strain is required to obtain high‐angle grain boundaries (HAGBs) because its recovery process is slower. Conversely, Figure c shows that the F138 steel has a lower hardening saturation level compared with that in the literature because it does not undergo martensitic transformation as the 316L steel, which was used to draw the flow curve.…”

Section: Resultsmentioning

confidence: 99%

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Severe Plastic Deformation by Equal Channel Angular Pressing and Rolling: The Influence of the Deformation Path on Strain Distribution

et al. 2017

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The present work compares two deformation techniques, rolling and Equal Channel Angular pressing (ECAP), and the response offered by three different materials that differ in Stacking Fault Energy (SFE): AA1010 Al, commercially pure Cu, and an austenitic stainless steel. The objective of this investigation is to study the effect of each deformation mode on tensile behavior, deformation mechanism, texture, and microstructure and to establish the influence of the stacking fault energy on said effects. The results show that the different strain paths of ECAP and rolling do not affect the strength, but rolling leads to an accentuated texture and thus to elastic and plastic anisotropy. This finding has practical relevance for micro manufacturing techniques. Furthermore, it is observed that lower SFE results in smaller domain size and higher dislocation density, which are microstructural details related to strength and to the work hardening capacity. Finally, both techniques are able to produce a high amount of high angle grain boundaries, a feature that characterizes refined microstructures. These processes operate at different strain rates; thus, in low SFE materials, a more effective grain fragmentation by deformation-induced twins is observed after the ECAP process.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Severe Plastic Deformation by Equal Channel Angular Pressing and Rolling: The Influence of the Deformation Path on Strain Distribution

et al. 2017

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“…Известным примером консервативного движения ГЗ, не связанного с какой-либо диффузионной перетасовкой атомов является движение двойниковых границ. Отметим, что нанодвойники играют большую роль в процессах пластической деформации нанозерен в ГЦК-материалах с низким значением энергии дефекта упаковки (stacking fault -SF) [16][17][18].…”

Section: Introductionunclassified

Зернограничное проскальзывание и миграция специальных границ зерен в бикристаллах Al. Атомистическое моделирование

Карькина¹,

Карькин²,

Кузнецов³

et al. 2018

Физика Твердого Тела

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Для выяснения механизмов, контролирующих процессы проскальзывания и миграции границ зерен (ГЗ), энергетика зернограничных сдвигов для нескольких типичных симметричных ГЗ наклона 3 (111), 5 (012), 5 (013) и 11 (113) в бикристалле Al рассчитана с использованием методов ab initio и молекулярно-динамического моделирования. Определена энергия обобщенных зернограничных дефектов упаковки (GB−SF), установлены предпочтительные направления и энергетический барьер для зернограничного проскальзывания. Показано, что относительное смещение соседних зерен при определенных направлениях частичных сдвигов сопровождается консервативной миграцией ГЗ в направлении, перпендикулярном плоскости ее плоскости. Результаты моделирования сопоставляются с известными механизмами зернограничного скольжения Al. Работа выполнена в рамках государственного задания по темам "Давление" № АААА-А18-118020190104-3 и "Структура" № АААА-А18-118020190116-6.

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“…12. The stress-strain curve of the pure copper sample before and after SIHPT process, after four-pass ECAP process [15] and after five turn conventional HPT process [16].…”

Section: Fig 7 Tem Lamella Prepared Through Axial Direction Of the mentioning

confidence: 99%

A new designed incremental high pressure torsion process for producing long nanostructured rod samples

Eskandarzade

Masoumi

Faraji

et al. 2017

Journal of Alloys and Compounds

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Microstructure and mechanical behavior of UFG copper processed by ECAP following different processing regimes

Cited by 25 publications

References 37 publications

Severe Plastic Deformation by Equal Channel Angular Pressing and Rolling: The Influence of the Deformation Path on Strain Distribution

Severe Plastic Deformation by Equal Channel Angular Pressing and Rolling: The Influence of the Deformation Path on Strain Distribution

Зернограничное проскальзывание и миграция специальных границ зерен в бикристаллах Al. Атомистическое моделирование

A new designed incremental high pressure torsion process for producing long nanostructured rod samples

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