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- Krakhmalev, Pavel, 1973-, et al.
(författare)
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Structural integrity I: static mechanical properties : Chapter 13
- 2021
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Ingår i: Fundamentals of Laser Powder Bed Fusion of Metals. - : Elsevier. - 9780128240908 ; , s. 349-376
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Bokkapitel (refereegranskat)abstract
- Laser powder bed fusion (L-PBF) is one of the additive manufacturing methods to produce metallic parts. The layer-by-layer manufacturing nature results in the formation of specific microstructure, achieving different properties compared to conventional analogs. In this chapter, the mechanical properties of the main classes of materials such as steels, aluminum and titanium alloys, as well as nickel-base superalloys manufactured by L-PBF are overviewed. The focus is on the static mechanical properties obtained by tensile tests as the most common standard method for the measurement of mechanical characteristics. A correlation between manufacturing, microstructure, and mechanical properties of these L-PBF materials is highlighted.
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| 2. |
- Vilardell, Anna Martín, et al.
(författare)
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In Vitro Characterization of In Situ Alloyed Ti6Al4V(ELI)-3 at.% Cu Obtained by Laser Powder Bed Fusion
- 2021
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Ingår i: Materials. - : MDPI AG. - 1996-1944. ; 14:23, s. 7260-7260
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Tidskriftsartikel (refereegranskat)abstract
- The intensive cytotoxicity of pure copper is effectively kills bacteria, but it can compromise cellular behavior, so a rational balance must be found for Cu-loaded implants. In the present study, the individual and combined effect of surface composition and roughness on osteoblast cell behavior of in situ alloyed Ti6Al4V(ELI)-3 at.% Cu obtained by laser powder bed fusion was studied. Surface composition was studied using scanning electron microscopy, energy dispersive spectroscopy, and X-ray diffraction. Surface roughness measurements were carried out using confocal microscopy. In vitro osteoblast performance was evaluated by means of cell morphology observation of cell viability, proliferation, and mineralization. In vitro studies were performed at 1, 7, and 14 days of cell culture, except for cell mineralization at 28 days, on grounded and as-built (rough) samples with and without 3 at.% Cu. The addition of 3 at.% Cu did not show cell cytotoxicity but inhibited cell proliferation. Cell mineralization tends to be higher for samples with 3 at.% Cu content. Surface roughness inhibited cell proliferation too, but showed enhanced cell mineralization capacity and therefore, higher osteoblast performance, especially when as-built samples contained 3 at.% Cu. Cell proliferation was only observed on ground samples without Cu but showed the lowest cell mineralization.
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