Influence of Equal-Channel Angular Pressing on Grain Structure and Internal Stresses of Technically Pure Nickel
| Parent link: | Russian Physics Journal Vol. 65, iss. 9.— 2023.— [P. 1436-1442] |
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| Institution som forfatter: | |
| Andre forfattere: | , , , |
| Summary: | Title screen Using transmission electron microscopy, the structure, phase composition, defects, amplitude of internal stresses and their sources are studied in the ultrafine-grained technically pure nickel produced by the method of equal-channel angular pressing (ECAP). During ECAP, the samples are subjected to shear deformation by compression along two intersecting channels of equal diameters at an angle of 120° and a temperature of T = 400°C without intermediate annealing within four passes, n = 4. An examination of the grain structure demonstrates that all grains are anisotropic. According to the dislocation structure, the grains are classified into three types: 1) the smallest grains with no substructure (practically no dislocations) – dislocation-free grains, 2) larger grains containing chaotically distributed dislocations or a net substructure, and 3) the largest grains with a cellular or fragmented substructure. The average value of the scalar dislocation density in the grains of each type is calculated. It is found out that equal-channel angular pressing results in the formation of nanosized particles of secondary phases localized inside the grains, at grain boundaries and at grain junctions of ultrafine-grained nickel. The sources of internal stresses are revealed and their amplitude is determined. The amplitude of the internal stresses is calculated using the amplitude of the crystal lattice curvature-torsion from the bending extinction contours Режим доступа: по договору с организацией-держателем ресурса |
| Sprog: | engelsk |
| Udgivet: |
2023
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| Fag: | |
| Online adgang: | https://doi.org/10.1007/s11182-023-02788-5 |
| Format: | Electronisk Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=669200 |
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| 200 | 1 | |a Influence of Equal-Channel Angular Pressing on Grain Structure and Internal Stresses of Technically Pure Nickel |d Влияние равноканального углового прессования на зеренную структуру и внутренние напряжения технически чистого никеля |f N. A. Popova, E. L. Nikonenko, Yu. V. Solovjeva, V. A. Starenchenko | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 25 tit.] | ||
| 330 | |a Using transmission electron microscopy, the structure, phase composition, defects, amplitude of internal stresses and their sources are studied in the ultrafine-grained technically pure nickel produced by the method of equal-channel angular pressing (ECAP). During ECAP, the samples are subjected to shear deformation by compression along two intersecting channels of equal diameters at an angle of 120° and a temperature of T = 400°C without intermediate annealing within four passes, n = 4. An examination of the grain structure demonstrates that all grains are anisotropic. According to the dislocation structure, the grains are classified into three types: 1) the smallest grains with no substructure (practically no dislocations) – dislocation-free grains, 2) larger grains containing chaotically distributed dislocations or a net substructure, and 3) the largest grains with a cellular or fragmented substructure. The average value of the scalar dislocation density in the grains of each type is calculated. It is found out that equal-channel angular pressing results in the formation of nanosized particles of secondary phases localized inside the grains, at grain boundaries and at grain junctions of ultrafine-grained nickel. The sources of internal stresses are revealed and their amplitude is determined. The amplitude of the internal stresses is calculated using the amplitude of the crystal lattice curvature-torsion from the bending extinction contours | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t Russian Physics Journal | ||
| 463 | |t Vol. 65, iss. 9 |v [P. 1436-1442] |d 2023 | ||
| 510 | 1 | |a Влияние равноканального углового прессования на зеренную структуру и внутренние напряжения технически чистого никеля |z rus | |
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a severe plastic deformation | |
| 610 | 1 | |a equal-channel angular pressing | |
| 610 | 1 | |a ultrafine-grained nickel | |
| 610 | 1 | |a grain | |
| 610 | 1 | |a particle | |
| 610 | 1 | |a dislocation structure | |
| 610 | 1 | |a scalar dislocation density | |
| 610 | 1 | |a internal stresses | |
| 610 | 1 | |a amplitude of curvature-twist of crystal lattice | |
| 610 | 1 | |a internal stresses | |
| 610 | 1 | |a stress sources | |
| 701 | 1 | |a Popova |b N. A. |g Nataljya Anatoljevna | |
| 701 | 1 | |a Nikonenko |b E. L. |c physicist |c Associate Professor of Tomsk Polytechnic University, candidate of physical and mathematical sciences |f 1962- |g Elena Leonidovna |3 (RuTPU)RU\TPU\pers\35823 |9 18968 | |
| 701 | 1 | |a Solovjeva |b Yu. V. |g Yuliya Vladimirovna | |
| 701 | 1 | |a Starenchenko |b V. A. |g Vladimir Aleksandrovich | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Школа базовой инженерной подготовки |b Отделение естественных наук |3 (RuTPU)RU\TPU\col\23562 |
| 801 | 0 | |a RU |b 63413507 |c 20230228 |g RCR | |
| 856 | 4 | |u https://doi.org/10.1007/s11182-023-02788-5 | |
| 942 | |c CF | ||