title: 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-26 Nbingot.
authors.affiliation: Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux LEM3 (UMR CNRS 7239), Université de Lorraine, Ile de Saulcy, F-57045 Metz, France.
authors.forename: M
authors.initials: M
authors.lastname: Fischer
authors.affiliation: Laboratoire d'Etudes et de Recherches sur les Matériaux, les Procédés et les Surfaces LERMPS, Université de Technologie de Belfort Montbéliard, Sevenans, 90010 Belfort, France.
authors.forename: D
authors.initials: D
authors.lastname: Joguet
authors.affiliation: Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux LEM3 (UMR CNRS 7239), Université de Lorraine, Ile de Saulcy, F-57045 Metz, France.
authors.forename: G
authors.initials: G
authors.lastname: Robin
authors.affiliation: Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux LEM3 (UMR CNRS 7239), Ecole Nationale Supérieure d'Arts et Métiers, F-57078 Metz, France.
authors.forename: L
authors.initials: L
authors.lastname: Peltier
authors.affiliation: Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux LEM3 (UMR CNRS 7239), Université de Lorraine, Ile de Saulcy, F-57045 Metz, France.
authors.forename: P
authors.initials: P
authors.lastname: Laheurte
mesh_terms: D000497:Alloys / Q000737:chemistry* / Q000528:radiation effects; D001672:Biocompatible Materials / Q000737:chemistry; D055119:Elastic Modulus; D007834:Lasers; D008855:Microscopy, Electron, Scanning; D009556:Niobium / Q000737:chemistry*; D016062:Porosity; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D000497:Alloys; D001672:Biocompatible Materials; D009556:Niobium; D014025:Titanium
keywords: Beta titanium alloy; In situ alloying; Low modulus; Micro-tomography; Selective laser melting (SLM); Texture