Hydrogen influence on defect structure and mechanical properties of EBM Ti-6Al-4V; Materials Today: Proceedings; Vol. 19, Pt. 5 : International Conference on Modern Trends in Manufacturing Technologies and Equipment 2019

Hydrogen influence on defect structure and mechanical properties of EBM Ti-6Al-4V; Materials Today: Proceedings; Vol. 19, Pt. 5 : International Conference on Modern Trends in Manufacturing Technologies and Equipment 2019

Dettagli Bibliografici
Parent link:Materials Today: Proceedings
Vol. 19, Pt. 5 : International Conference on Modern Trends in Manufacturing Technologies and Equipment 2019.— 2019.— [P. 2084-2088]
Autore principale: Laptev R. S. Roman Sergeevich
Ente Autore: Национальный исследовательский Томский политехнический университет Инженерная школа ядерных технологий Отделение экспериментальной физики
Altri autori: Kudiyarov V. N. Victor Nikolaevich, Pushilina N. S. Natalia Sergeevna
Riassunto:Title screen
The defect structure and mechanical properties of the samples manufactured from Ti-6Al-4V powder by electron beam melting (EBM) before and after hydrogenation was studied. It has been established that hydrogenation of EBM titanium alloy to a concentration of 470?ppm leads to the formation of titanium ?-hydride, the volume content of which is 2.2%. A further increase in the concentration of hydrogen to 650?ppm is accompanied by a slight increase in the content of the hydride phase, while the proportion of the ? phase of titanium increases (to 4.9%). When the hydrogen content is 900?ppm, the fraction of ? hydride decreases and the fraction of the beta phase decreases to 4.2%, and the formation of the hydride phase ? is observed. The introduction of hydrogen leads to a decrease in the wear and an increase in the hardness of EBM Ti-6Al-4V samples. This circumstance is due to the microstructure refinement under the action of hydrogen and the formation of secondary phase precipitates. The hydrogen content increases, the dislocation density and the concentration of hydrogen-vacancy complexes linearly increase, which indicates that hydrogen not only actively interacts with existing defects but also induces the formation of new defects.
Режим доступа: по договору с организацией-держателем ресурса
Lingua:inglese
Pubblicazione: 2019
Soggetti:
электронный ресурс
труды учёных ТПУ
electron beam melting
defects
titanium alloy
hydrogen
positron
электронно-лучевая плавка
дефекты
титановые сплавы
водород
позитроны
Accesso online:https://doi.org/10.1016/j.matpr.2019.07.101
Natura: Elettronico Capitolo di libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=661963

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