Structure and Mechanical Properties of Milled and 3D-Printed Ti-6Al-4V Alloys for Subtractive and Additive CAD/CAM Manufacturing in Dentistry
The mechanical properties, structure, and morphology of milled and 3D-printed Ti-6Al-4V alloys produced by selective laser melting were investigated in this study. The mechanical properties were investigated by means of nanoindentation, a tensile test, and a three-point bending test. An Atomic Force...
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MDPI AG
2023-11-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/21/11958 |
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| author | Sabina Cherneva Vladimir Petrunov Vladimir Petkov Vladimir Bogdanov Silviya Simeonova |
| author_facet | Sabina Cherneva Vladimir Petrunov Vladimir Petkov Vladimir Bogdanov Silviya Simeonova |
| author_sort | Sabina Cherneva |
| collection | DOAJ |
| description | The mechanical properties, structure, and morphology of milled and 3D-printed Ti-6Al-4V alloys produced by selective laser melting were investigated in this study. The mechanical properties were investigated by means of nanoindentation, a tensile test, and a three-point bending test. An Atomic Force Microscope (AFM) was used to study the surface topography and roughness of both titanium alloys. The surface structure and phase analyses were studied by a scanning electron microscope (SEM) and through powder X-ray diffraction (XRD). The results from the nanoindentation experiments showed that the 3D-printed sample has higher indentation hardness and modulus than the milled one. The AFM observation of the surface topography of the samples showed that the milled sample has a higher roughness than the 3D-printed one. The tensile test results showed that the 3D-printed sample by means of Selective Laser Melting (SLM) technology has about 26% higher tensile strength and smaller elongation than the milled one. The three-point bending test revealed that the 3D-printed Ti-6Al-4V sample has higher flexural strength than the milled one. It was found that the 3D-printed sample has a smaller crystal size than the milled one, which, according to the Hall–Petch relationship, leads to its higher indentation hardness. |
| first_indexed | 2024-03-11T11:33:19Z |
| format | Article |
| id | doaj.art-1bbe2f7f48dc4c0eb49c185372c4f6bb |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T11:33:19Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-1bbe2f7f48dc4c0eb49c185372c4f6bb2023-11-10T14:59:18ZengMDPI AGApplied Sciences2076-34172023-11-0113211195810.3390/app132111958Structure and Mechanical Properties of Milled and 3D-Printed Ti-6Al-4V Alloys for Subtractive and Additive CAD/CAM Manufacturing in DentistrySabina Cherneva0Vladimir Petrunov1Vladimir Petkov2Vladimir Bogdanov3Silviya Simeonova4Institute of Mechanics, Bulgarian Academy of Sciences, Acad. G. Bontchev St., Bl. 4, 1113 Sofia, BulgariaFaculty of Dental Medicine, Medical University of Sofia, St. Georgi Sofiiski Blvd., 1431 Sofia, BulgariaInstitute of Metal Science, Equipment and Technologies with Hydro- and Aerodynamics Centre “Acad. A. Balevski”, Bulgarian Academy of Sciences, 67 Shipchenski Prohod Street, 1113 Sofia, BulgariaFaculty of Dental Medicine, Medical University of Sofia, St. Georgi Sofiiski Blvd., 1431 Sofia, BulgariaFaculty of Chemistry and Pharmacy, Sofia University, 1 James Bourchier Blvd., 1164 Sofia, BulgariaThe mechanical properties, structure, and morphology of milled and 3D-printed Ti-6Al-4V alloys produced by selective laser melting were investigated in this study. The mechanical properties were investigated by means of nanoindentation, a tensile test, and a three-point bending test. An Atomic Force Microscope (AFM) was used to study the surface topography and roughness of both titanium alloys. The surface structure and phase analyses were studied by a scanning electron microscope (SEM) and through powder X-ray diffraction (XRD). The results from the nanoindentation experiments showed that the 3D-printed sample has higher indentation hardness and modulus than the milled one. The AFM observation of the surface topography of the samples showed that the milled sample has a higher roughness than the 3D-printed one. The tensile test results showed that the 3D-printed sample by means of Selective Laser Melting (SLM) technology has about 26% higher tensile strength and smaller elongation than the milled one. The three-point bending test revealed that the 3D-printed Ti-6Al-4V sample has higher flexural strength than the milled one. It was found that the 3D-printed sample has a smaller crystal size than the milled one, which, according to the Hall–Petch relationship, leads to its higher indentation hardness.https://www.mdpi.com/2076-3417/13/21/11958titanium alloysmillingselective laser meltingmechanical propertiessurface structure |
| spellingShingle | Sabina Cherneva Vladimir Petrunov Vladimir Petkov Vladimir Bogdanov Silviya Simeonova Structure and Mechanical Properties of Milled and 3D-Printed Ti-6Al-4V Alloys for Subtractive and Additive CAD/CAM Manufacturing in Dentistry Applied Sciences titanium alloys milling selective laser melting mechanical properties surface structure |
| title | Structure and Mechanical Properties of Milled and 3D-Printed Ti-6Al-4V Alloys for Subtractive and Additive CAD/CAM Manufacturing in Dentistry |
| title_full | Structure and Mechanical Properties of Milled and 3D-Printed Ti-6Al-4V Alloys for Subtractive and Additive CAD/CAM Manufacturing in Dentistry |
| title_fullStr | Structure and Mechanical Properties of Milled and 3D-Printed Ti-6Al-4V Alloys for Subtractive and Additive CAD/CAM Manufacturing in Dentistry |
| title_full_unstemmed | Structure and Mechanical Properties of Milled and 3D-Printed Ti-6Al-4V Alloys for Subtractive and Additive CAD/CAM Manufacturing in Dentistry |
| title_short | Structure and Mechanical Properties of Milled and 3D-Printed Ti-6Al-4V Alloys for Subtractive and Additive CAD/CAM Manufacturing in Dentistry |
| title_sort | structure and mechanical properties of milled and 3d printed ti 6al 4v alloys for subtractive and additive cad cam manufacturing in dentistry |
| topic | titanium alloys milling selective laser melting mechanical properties surface structure |
| url | https://www.mdpi.com/2076-3417/13/21/11958 |
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