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

Abstract : 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.
Type de document :
Article dans une revue
Materials Science and Engineering: C, Elsevier, 2016, 62, pp.852-859. 〈10.1016/j.msec.2016.02.033〉
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https://hal.univ-lorraine.fr/hal-01515203
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Soumis le : jeudi 27 avril 2017 - 09:59:07
Dernière modification le : jeudi 11 janvier 2018 - 06:23:43

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Marie Fischer, D. Joguet, Guillaume Robin, Laurent Peltier, Pascal Laheurte. In situ elaboration of a binary Ti-26Nb alloy by selective laser melting of elemental titanium and niobium mixed powders. Materials Science and Engineering: C, Elsevier, 2016, 62, pp.852-859. 〈10.1016/j.msec.2016.02.033〉. 〈hal-01515203〉

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