Oxidation Kinetics of Ti-6Al-4V Alloys by Conventional and Electron Beam Additive Manufacturing

Estupiñan López, Francisco H. y Orquiz Muela, Carlos y Gaona Tiburcio, Citlalli y Cabral Miramontes, José Ángel y Bautista Margulis, Raúl German y Nieves Mendoza, Demetrio y Maldonado Bandala, Erick y Almeraya Calderón, Facundo y Lopes, Amit Joe (2023) Oxidation Kinetics of Ti-6Al-4V Alloys by Conventional and Electron Beam Additive Manufacturing. Materials, 16 (3). pp. 1-15. ISSN 1996-1944

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URL o página oficial: https://doi.org/10.3390/ma16031187

Resumen

New manufacturing processes for metal parts such as additive manufacturing (AM) provide a technological development for the aeronautical and aerospace industries, since these AM processes are a means to reduce the weight of the parts, which generate cost savings. AM techniques such as Laser Powder Bed Fusions (LPBF) and Electron Beam Fusion (EBM), provided an improvement in mechanical properties, corrosion resistance, and thermal stability at temperatures below 400 °C, in comparison to conventional methods. This research aimed to study the oxidation kinetics of Ti-6Al-4V alloys by conventional and Electron Beam Additive Manufacturing. The thermogravimetric analysis was performed at temperatures of 600 °C, 800 °C, and 900 °C, having a heating rate of 25 °C/min and oxidation time of 24 h. The microstructural analysis was carried out by thermogravimetric analysis. Thickness and morphology of oxide layers were analyzed by field emission scanning electron microscope, phase identification (before and after the oxidation process) was realized by X-ray diffraction at room temperature and hardness measurements were made in cross section. Results indicated that the oxidation kinetics of Ti-6Al-4V alloys fabricated by EBM was similar to conventional processing and obeyed a parabolic or quasi-parabolic kinetics. The samples oxidized at 600 °C for 24 h presented the lowest hardness values (from 350 to 470 HV). At oxidation temperatures of 800 and 900 °C, however, highest hardness values (from 870 close to the alpha-case interface up to 300 HV in base metal) were found on the surface and gradually decreased towards the center of the base alloy. This may be explained by different microstructures presented in the manufacturing processes

Tipo de elemento:

Article

Palabras claves no controlados:

Titanium, Additive manufacturing, Oxidation kinetics, Electron beam fusion.

Materias:

CONACYT > Ingeniería y Tecnología
T Tecnología > TA Ingeniería General y Civil

Divisiones:

Ingeniería Mecánica y Eléctrica

Usuario depositante:

Dra Citlalli Gaona

Creadores:

Creador	Email	ORCID
Estupiñan López, Francisco H.	NO ESPECIFICADO	NO ESPECIFICADO
Orquiz Muela, Carlos	NO ESPECIFICADO	NO ESPECIFICADO
Gaona Tiburcio, Citlalli	NO ESPECIFICADO	orcid.org/0000-0001-9072-3090
Cabral Miramontes, José Ángel	NO ESPECIFICADO	NO ESPECIFICADO
Bautista Margulis, Raúl German	NO ESPECIFICADO	NO ESPECIFICADO
Nieves Mendoza, Demetrio	NO ESPECIFICADO	NO ESPECIFICADO
Maldonado Bandala, Erick	NO ESPECIFICADO	NO ESPECIFICADO
Almeraya Calderón, Facundo	NO ESPECIFICADO	orcid.org/0000-0002-3014-2814
Lopes, Amit Joe	NO ESPECIFICADO	NO ESPECIFICADO