Continuous Electron Beam Post-Treatment of EBF3-Fabricated Ti-6Al-4V Parts

Continuous Electron Beam Post-Treatment of EBF3-Fabricated Ti-6Al-4V Parts

Dettagli Bibliografici
Parent link:	Metals Vol. 9, iss. 6.— 2019.— [699, 16 p.]
Enti autori:	Национальный исследовательский Томский политехнический университет Инженерная школа ядерных технологий Отделение экспериментальной физики, Национальный исследовательский Томский политехнический университет Инженерная школа новых производственных технологий Отделение материаловедения
Altri autori:	Panin A. V. Alexey Viktorovich, Kazachenok M. S. Marina Sergeevna, Perevalova O. B. Olga Borisovna, Martynov S. A. Sergey Andreevich, Panina A. A. Aleksandra Anatolievna, Sklyarova E. A. Elena Aleksandrovna
Riassunto:	Title screen In the present study, the methods of optical, scanning electron, and transmission electron microscopy as well as X-ray diffraction analysis gained insights into the mechanisms of surface finish and microstructure formation of Ti-6Al-4V parts during an EBF3-process. It was found that the slip band propagation within the outermost surface layer provided dissipation of the stored strain energy associated with martensitic transformations. The latter caused the lath fragmentation as well as precipitation of nanosized β grains and an orthorhombic martensite α″ phase at the secondary α lath boundaries of as-built Ti-6Al-4V parts. The effect of continuous electron beam post-treatment on the surface finish, microstructure, and mechanical properties of EBF3-fabricated Ti-6Al-4V parts was revealed. The brittle outermost surface layer of the EBF3-fabricated samples was melted upon the treatment, resulting in the formation of equiaxial prior β grains of 20 to 30 μm in size with the fragmented acicular α′ phase. Electron-beam irradiation induced transformations within the 70 μm thick molten surface layer and 500 μm thick heat affected zone significantly increased the Vickers microhardness and tensile strength of the EBF3-fabricated Ti-6Al-4V samples.
Lingua:	inglese
Pubblicazione:	2019
Soggetti:	электронный ресурс труды учёных ТПУ additive manufacturing electron beam free-form fabrication continuous electron beam post-treatment surface finish microstructure surface hardening электронные пучки добавки поверхности микроструктура
Accesso online:	http://earchive.tpu.ru/handle/11683/57277 https://doi.org/10.3390/met9060699
Natura:	Elettronico Capitolo di libro
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=660978

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