Fatigue resistance and biocompatibility are key parameters for the successful implantation of hard-tissue prostheses, which nowadays are more and more frequently manufactured by selective laser melting (SLM). For this purpose, the present paper is aimed at investigating the effect of post-sintering treatments on the fatigue behavior and biological properties of Ti samples produced by SLM. After the building process, all samples are heat treated to achieve a complete stress relief. The remaining ones are tribofinished with the aim of reducing the surface roughness of the as-sintered condition. Part of the tribofinished samples are then subjected to one of the following post-sintering treatments: (i) shot peening, (ii) hot isostatic pressing (HIP), and (iii) electro- polishing. It is found that shot peening and HIP are the most effective treatments to improve the high and the very-high cycle fatigue resistance, respectively. At the same time, they preserve the good biocompatibility ensured by the biomedical Titanium Grade 23.

The effect of post-sintering treatments on the fatigue and biological behavior of Ti-6Al-4V ELI parts made by selective laser melting / Benedetti, Matteo; Torresani, Elisa; Leoni, Matteo; Fontanari, Vigilio; Bandini, M.; Pederzolli, C.; Potrich, C.. - In: JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS. - ISSN 1751-6161. - STAMPA. - 71:(2017), pp. 295-306. [10.1016/j.jmbbm.2017.03.024]

The effect of post-sintering treatments on the fatigue and biological behavior of Ti-6Al-4V ELI parts made by selective laser melting

Benedetti, Matteo;Torresani, Elisa;Leoni, Matteo;Fontanari, Vigilio;
2017-01-01

Abstract

Fatigue resistance and biocompatibility are key parameters for the successful implantation of hard-tissue prostheses, which nowadays are more and more frequently manufactured by selective laser melting (SLM). For this purpose, the present paper is aimed at investigating the effect of post-sintering treatments on the fatigue behavior and biological properties of Ti samples produced by SLM. After the building process, all samples are heat treated to achieve a complete stress relief. The remaining ones are tribofinished with the aim of reducing the surface roughness of the as-sintered condition. Part of the tribofinished samples are then subjected to one of the following post-sintering treatments: (i) shot peening, (ii) hot isostatic pressing (HIP), and (iii) electro- polishing. It is found that shot peening and HIP are the most effective treatments to improve the high and the very-high cycle fatigue resistance, respectively. At the same time, they preserve the good biocompatibility ensured by the biomedical Titanium Grade 23.
2017
Benedetti, Matteo; Torresani, Elisa; Leoni, Matteo; Fontanari, Vigilio; Bandini, M.; Pederzolli, C.; Potrich, C.
The effect of post-sintering treatments on the fatigue and biological behavior of Ti-6Al-4V ELI parts made by selective laser melting / Benedetti, Matteo; Torresani, Elisa; Leoni, Matteo; Fontanari, Vigilio; Bandini, M.; Pederzolli, C.; Potrich, C.. - In: JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS. - ISSN 1751-6161. - STAMPA. - 71:(2017), pp. 295-306. [10.1016/j.jmbbm.2017.03.024]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/171938
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