Change in the Phase Composition and Lattice Parameters of the Solid Solution Based on a-Ti in the Surface Layers of the Ti–6Al–4V Alloy Subjected to Electron-Beam Treatment
| Parent link: | Physics of Metals and Metallography Vol. 121, iss. 2.— 2020.— [P. 143-149] |
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| Main Author: | |
| Corporate Author: | |
| Other Authors: | , |
| Summary: | Title screen The microstructure, phase composition, and lattice parameters of the α-Ti- based solid solution in the Ti-6Al-4V alloy treated by pulsed and continuous electron beams with the energy density of 18-24 and 450 J/cm2, respectively, have been investigated using the methods of X-ray diffraction analysis and transmission and scanning electron microscopy. In the initial state, the two-phase (α + β) alloy had a polycrystalline structure with the equiaxed α-phase grains and β-phase grains located at the junctions or along the boundaries of the α-phase grains. After the electron-beam treatment, α' martensite with a lamellar structure is formed in the molten surface layer, which then experiences an α' → α + α'' + β phase transformation. In the α phase, the lamellar structure inherited from the α' martensite is retained; the β phase is located along the boundaries of lamellar grains of the α phase; the α'' phase is located both in the β phase and inside the lamellar grains of the α phase. It has been revealed that the greater the total volume fraction of the β and α'' phases, the greater the lattice parameters of α-Ti and their axial ratio c/a, and the less the total mean-square displacements of atoms in the 101 direction in the α-Ti phase. The decrease in the total mean-square displacements in the α-Ti phase is due to the diffusion of the vanadium atoms into the β phase. With an increase in the energy density of the electron beam and with a decrease in the rate of cooling of the molten layer, the total volume fraction of the β and α'' phases increases and reaches 6%. Режим доступа: по договору с организацией-держателем ресурса |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://doi.org/10.1134/S0031918X20020143 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=662464 |
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| 200 | 1 | |a Change in the Phase Composition and Lattice Parameters of the Solid Solution Based on a-Ti in the Surface Layers of the Ti–6Al–4V Alloy Subjected to Electron-Beam Treatment |f O. B. Perevalova, A. V. Panin, E. A. Sinyakova | |
| 203 | |a Текст |c электронный | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 23 tit.] | ||
| 330 | |a The microstructure, phase composition, and lattice parameters of the α-Ti- based solid solution in the Ti-6Al-4V alloy treated by pulsed and continuous electron beams with the energy density of 18-24 and 450 J/cm2, respectively, have been investigated using the methods of X-ray diffraction analysis and transmission and scanning electron microscopy. In the initial state, the two-phase (α + β) alloy had a polycrystalline structure with the equiaxed α-phase grains and β-phase grains located at the junctions or along the boundaries of the α-phase grains. After the electron-beam treatment, α' martensite with a lamellar structure is formed in the molten surface layer, which then experiences an α' → α + α'' + β phase transformation. In the α phase, the lamellar structure inherited from the α' martensite is retained; the β phase is located along the boundaries of lamellar grains of the α phase; the α'' phase is located both in the β phase and inside the lamellar grains of the α phase. It has been revealed that the greater the total volume fraction of the β and α'' phases, the greater the lattice parameters of α-Ti and their axial ratio c/a, and the less the total mean-square displacements of atoms in the 101 direction in the α-Ti phase. The decrease in the total mean-square displacements in the α-Ti phase is due to the diffusion of the vanadium atoms into the β phase. With an increase in the energy density of the electron beam and with a decrease in the rate of cooling of the molten layer, the total volume fraction of the β and α'' phases increases and reaches 6%. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t Physics of Metals and Metallography | ||
| 463 | |t Vol. 121, iss. 2 |v [P. 143-149] |d 2020 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a titanium Ti–6Al–4V alloy | |
| 610 | 1 | |a electron-beam treatment | |
| 610 | 1 | |a X-ray diffraction analysis | |
| 610 | 1 | |a transmission and scanning electron microscopy | |
| 610 | 1 | |a phase composition | |
| 610 | 1 | |a microstructure | |
| 610 | 1 | |a total mean-square displacements of atoms | |
| 610 | 1 | |a титановые сплавы | |
| 610 | 1 | |a электронно-лучевая обработка | |
| 610 | 1 | |a рентгеноструктурный анализ | |
| 610 | 1 | |a микроскопия | |
| 610 | 1 | |a фазовый состав | |
| 700 | 1 | |a Perevalova |b O. B. |g Olga Borisovna | |
| 701 | 1 | |a Panin |b A. V. |c physicist |c Professor of Tomsk Polytechnic University, doctor of physical and mathematical Sciences |f 1971- |g Alexey Viktorovich |3 (RuTPU)RU\TPU\pers\34630 |9 17992 | |
| 701 | 1 | |a Sinyakova |b E. A. |g Elena Aleksandrovna | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Инженерная школа ядерных технологий |b Отделение экспериментальной физики |3 (RuTPU)RU\TPU\col\23549 |
| 801 | 2 | |a RU |b 63413507 |c 20200820 |g RCR | |
| 856 | 4 | |u https://doi.org/10.1134/S0031918X20020143 |z https://doi.org/10.1134/S0031918X20020143 | |
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