In situ elaboration of a binary Ti-26Nb alloy by selective laser melting of elemental titanium and niobium mixed powders

被引：208
作者：
Fischer, M. [1 ]
Joguet, D. [2 ]
Robin, G. [1 ]
Peltier, L. [3 ]
Laheurte, P. [1 ]
机构：
[1] Univ Lorraine, CNRS, UMR 7239, LEM3, F-57045 Metz, France
[2] Univ Technol Belfort Montbeliard, LERMPS, F-90010 Sevenans, Belfort, France
[3] Ecole Natl Super Arts & Metiers, CNRS, UMR 7239, LEM3, F-57078 Metz, France
来源：
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS | 2016年 / 62卷
关键词：
Selective laser melting (SLM); In situ alloying; Beta titanium alloy; Micro-tomography; Texture; Low modulus; SHAPE-MEMORY; MECHANICAL-BEHAVIOR; ELASTIC BEHAVIOR; MICROSTRUCTURE; TRANSFORMATION; IMPLANTS; MODULUS; TI-40NB;
D O I：
10.1016/j.msec.2016.02.033
中图分类号：
TB3 [工程材料学]; R318.08 [生物材料学];
学科分类号：
0805 ; 080501 ; 080502 ;
摘要：
Ti-Nb alloys are excellent candidates for biomedical applications such as implantology and joint replacement because of their very low elastic modulus, their excellent biocompatibility and their high strength. A low elastic modulus, close to that of the cortical bone minimizes the stress shielding effect that appears subsequent to the insertion of an implant. The objective of this study is to investigate the microstructural and mechanical properties of a Ti-Nb alloy elaborated by selective laser melting on powder bed of a mixture of Ti and Nb elemental powders (26 at%). The influence of operating parameters on porosity of manufactured samples and on efficacy of dissolving Nb particles in Ti was studied. The results obtained by optical microscopy, SEM analysis and X-ray microtomography show that the laser energy has a significant effect on the compactness and homogeneity of the manufactured parts. Homogeneous and compact samples were obtained for high energy levels. Microstructure of these samples has been further characterized. Their mechanical properties were assessed by ultrasonic measures and the Young's modulus found is close to that of classically elaborated Ti-26Nb ingot. (C) 2016 Elsevier B.V. All rights reserved.
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页码：852 / 859
页数：8
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