The selective laser melting of Ti6Al4V would induce definite changes in the microstructure that may affect its corrosion properties. Microstructural examination showed the formation of relatively thin beta (β) lamella in selective laser melted (SLM) Ti6Al4V compared to wrought Ti6Al4V. X-ray diffraction analysis (XRD) analysis confirmed the presence of alpha and beta phases in both SLM and wrought Ti6Al4V. However, the higher concentration of the β phase in SLM Ti6Al4V compared to wrought Ti6Al4V was evident in the microstructure. As candidate dental implant materials, the corrosion behavior of both SLM and wrought Ti6Al4V was assessed in artificial saliva (AS) and deionized water (DI) containing various species i.e. fluoride (F), calcium chloride (CaCl) and lactic acid (LA). Electrochemical impedance spectroscopy and potentiodynamic polarization analysis was carried out to estimate the corrosion behavior of SLM and wrought Ti6Al4V at room temperature. SLM Ti6Al4V offered better corrosion resistance than wrought Ti6Al4V in all solutions at pH > 6. However, wrought Ti6Al4V comparatively presented high corrosion resistance in AS + LA, DI + CaCl and DI + LA solutions (pH < 6). The lower dissolution rate of SLM Ti6Al4V (at pH > 6) was attributed to larger β content in the microstructure compared to wrought Ti6Al4V.
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http://dx.doi.org/10.1016/j.msec.2020.110980 | DOI Listing |
J Mater Chem B
June 2024
Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India.
This work aimed to manufacture Ti-28.5Nb and Ti-40.0Nb (wt%) alloys selective laser melting (SLM) from Ti and Nb elemental powders.
View Article and Find Full Text PDFHeliyon
September 2023
Grupo Calidad Metrología y Producción, Instituto Tecnológico Metropolitano -ITM, Medellín, Antioquia, 050034, Colombia.
This study investigates and compares plasma electrolytic oxidation (PEO) coatings produced on wrought Ti6Al4V alloy substrates with those resulting from electron beam powder bed fusion (PBF-EB). For a duration of 1000 s, a phosphate/silicate electrolyte with a current density of 50 A/cm was employed to fabricate the coatings. Surface and polished cross-sections of the coated specimens underwent SEM and X-ray diffraction (XRD) analyses.
View Article and Find Full Text PDFMicromachines (Basel)
May 2023
Department of Naval Architecture and Marine Engineering, Faculty of Maritime, Bandırma Onyedi Eylul University, 10200 Bandırma, Turkey.
Selective laser melting (SLM) is a three-dimensional (3D) printing process that can manufacture functional parts with complex geometries as an alternative to using traditional processes, such as machining wrought metal. If precision and a high surface finish are required, particularly for creating miniature channels or geometries smaller than 1 mm, the fabricated parts can be further machined. Therefore, micro milling plays a significant role in the production of such miniscule geometries.
View Article and Find Full Text PDFMaterials (Basel)
May 2023
Bánki Donát Faculty of Mechanical and Safety Engineering, Óbuda University, Népszínház u. 8., H-1081 Budapest, Hungary.
This work aimed to comprehensively evaluate the influence of different surface modifications on the surface roughness of Ti6Al4V alloys produced by selective laser melting (SLM), casting and wrought. The Ti6Al4V surface was treated using blasting with AlO (70-100 µm) and ZrO (50-130 µm) particles, acid etching with 0.017 mol/dm hydrofluoric acids (HF) for 120 s, and a combination of blasting and acid etching (SLA).
View Article and Find Full Text PDFMaterials (Basel)
March 2023
School of Engineering, RMIT University, Melbourne, VIC 3083, Australia.
Titanium alloys are extensively used in various industries due to their excellent corrosion resistance and outstanding mechanical properties. However, titanium alloys are difficult to machine due to their low thermal conductivity and high chemical reactivity with tool materials. In recent years, there has been increasing interest in the use of titanium components produced by additive manufacturing (AM) for a range of high-value applications in aerospace, biomedical, and automotive industries.
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