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

被引：176
作者：
Benedetti, M. [1 ]
Torresani, E. [1 ]
Leoni, M. [2 ]
Fontanari, V. [1 ]
Bandini, M. [3 ]
Pederzolli, C. [4 ]
Potrich, C. [4 ,5 ]
机构：
[1] Univ Trento, Dept Ind Engn, Trento, Italy
[2] Univ Trento, Dept Civil Environm & Mech Engn, Trento, Italy
[3] Peen Serv Ltd, Bologna, Italy
[4] Fdn Bruno Kessler, Lab Biomol Sequence & Struct Anal Hlth, Trento, Italy
[5] CNR, Inst Biophys, Trento, Italy
来源：
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS | 2017年 / 71卷
关键词：
Selective laser melting; Ti-6Al-4V ELI; Fatigue; Shot peening; Hot isostatic pressing; Biocompability; HIGH-CYCLE FATIGUE; MECHANICAL-PROPERTIES; METALLIC BIOMATERIALS; SURFACE-MORPHOLOGY; TITANIUM-ALLOYS; MICROSTRUCTURE; TI6AL4V; RESISTANCE; IMPLANTS; DEFORMATION;
D O I：
10.1016/j.jmbbm.2017.03.024
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
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) electropolishing. 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.
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页码：295 / 306
页数：12
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