Abstract
Laser Powder Bed Fusion (LPBF) technology was used to produce samples based on the Ti–6Al–4V alloy for biomedical applications. Solid-state phase transformations induced by thermal treatments were studied by neutron diffraction (ND), X-ray diffraction (XRD), scanning transmission electron microscopy (STEM) and energy-dispersive spectroscopy (EDS). Although, ND analysis is rather uncommon in such studies, this technique allowed evidencing the presence of retained β in α’ martensite of the as-produced (#AP) sample. The retained β was not detectable by XRD analysis, nor by STEM observations. Martensite contains a high number of defects, mainly dislocations, that anneal during the thermal treatment. Element diffusion and partitioning are the main mechanisms in the α ↔ β transformation that causes lattice expansion during heating and determines the final shape and size of phases. The retained β phase plays a key role in the α’ → β transformation kinetics.
Highlights
Metal additive manufacturing is taking the lead in market sections where low production volumes, freedom of design, and a high level of customization are the guiding lights, such as in biomedical and aerospace markets [1,2]
A Ti–6Al–4V alloy has been produced by Laser Powder Bed Fusion (LPBF), following the material processing used in the production of commercial devices employed in dentistry
The aim of the present paper is to investigate phase transitions induced by thermal treatments performed on Ti–6Al–4V samples produced by LPBF
Summary
Metal additive manufacturing is taking the lead in market sections where low production volumes, freedom of design, and a high level of customization are the guiding lights, such as in biomedical and aerospace markets [1,2]. This manufacturing technique is suitable for strategic metallic materials, which are difficult and expensive to manufacture with traditional subtractive technologies. Low-speed machining of forged titanium has been successfully employed over history, resulting in more than half of the raw materials wasted as scrap [5,6].
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
