Continuous Electron Beam Post-Treatment of EBF3-Fabricated Ti-6Al-4V Parts
Электронный архив ТПУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
Continuous Electron Beam Post-Treatment of EBF3-Fabricated Ti-6Al-4V Parts
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| Автор |
Panin, Alexey Viktorovich
Kazachenok, Marina Sergeevna Perevalova, Olga Borisovna Martynov, Sergey Andreevich Panina, Aleksandra Anatolievna Sklyarova, Elena Aleksandrovna |
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| Тематика |
additive manufacturing
electron beam free-form fabrication continuous electron beam post-treatment surface finish microstructure surface hardening электронные пучки добавки поверхности микроструктура |
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| Описание |
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.
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| Дата |
2020-01-10T08:52:33Z
2020-01-10T08:52:33Z 2019 |
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| Тип |
Article
Published version (info:eu-repo/semantics/publishedVersion) Journal article (info:eu-repo/semantics/article) |
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| Идентификатор |
Continuous Electron Beam Post-Treatment of EBF3-Fabricated Ti-6Al-4V Parts / A. V. Panin [et al.] // Metals. — 2019. — Vol. 9, iss. 6. — [699, 16 p.].
http://earchive.tpu.ru/handle/11683/57277 10.3390/met9060699 |
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| Язык |
en
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| Права |
Open access (info:eu-repo/semantics/openAccess)
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| Формат |
application/pdf
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| Издатель |
Томский политехнический университет
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| Источник |
Metals
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