Effect of the Beam Current during the Electron-Beam Melting of Titanium Alloy Ti-6Al-4V on the Structural Features and Phase Transitions in Gas-Phase Hydrogenation
| Parent link: | Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques Vol. 13, No. 3.— 2019.— [P. 429-433] |
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| Corporate Authors: | , |
| Other Authors: | , , , |
| Summary: | Title screen The structure of the titanium alloy Ti-6Al-4V manufactured by electron-beam melting is shown to be represented by initial [beta]-phase grains more than 40 [mu]m in size; the internal volume of the grains is filled with [alpha]-phase precipitates in the form of plates. The average size of the [alpha] plates is 1.6, 2, and 5 [mu]m at beam currents of 2, 2.5, and 3 mA, respectively. In situ X-ray diffractometry using synchrotron radiation shows that the phase transitions in the titanium alloy are divided into three main stages during hydrogenation to a concentration of 0.6 wt % at a temperature of 650°C and a pressure of 1 atm. An increase in the beam current from 2 to 3 mA does not significantly affect the phase composition of the alloy. During hydrogenation, the growth rate of the volume concentration of the [beta] phase is lower at a higher beam current. This indicates a decrease in the rate of hydrogen absorption with increasing beam current, which is associated with an increase in the size of [alpha] plates. Режим доступа: по договору с организацией-держателем ресурса |
| Published: |
2019
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| Subjects: | |
| Online Access: | https://doi.org/10.1134/S1027451019030170 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664366 |
| Summary: | Title screen The structure of the titanium alloy Ti-6Al-4V manufactured by electron-beam melting is shown to be represented by initial [beta]-phase grains more than 40 [mu]m in size; the internal volume of the grains is filled with [alpha]-phase precipitates in the form of plates. The average size of the [alpha] plates is 1.6, 2, and 5 [mu]m at beam currents of 2, 2.5, and 3 mA, respectively. In situ X-ray diffractometry using synchrotron radiation shows that the phase transitions in the titanium alloy are divided into three main stages during hydrogenation to a concentration of 0.6 wt % at a temperature of 650°C and a pressure of 1 atm. An increase in the beam current from 2 to 3 mA does not significantly affect the phase composition of the alloy. During hydrogenation, the growth rate of the volume concentration of the [beta] phase is lower at a higher beam current. This indicates a decrease in the rate of hydrogen absorption with increasing beam current, which is associated with an increase in the size of [alpha] plates. Режим доступа: по договору с организацией-держателем ресурса |
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| DOI: | 10.1134/S1027451019030170 |