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Development of dense and cellular solids in CRC OMO alloy for orthopaedic applications

Procedia Engineering
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DEVELOPMENT OF DENSE AND CELLULAR SOLIDS IN CRCOMO ALLOY FOR ORTHOPAEDIC APPLICATIONS Available online at ICM11 DEVELOPMENT OF DENSE AND CELLULAR SOLIDS IN CRCOMO ALLOY FOR ORTHOPAEDIC APPLICATIONS Sergio Rivera1, María Panera1, Daniel Miranda1, F.J. Belzunce Varela2 1Fundación ITMA. Parque Empresarial del Principado de Asturias (PEPA), Calafates, S/N, parcela L-3.4, 33400 Avilés, Asturias. [email protected], [email protected] 2Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica. Universidad de Oviedo. Campus universitario, 33203 Gijón, Asturias. [email protected] Abstract SLS (Selective laser sintering) is a rapid prototyping technique used for the development of new biomaterials with application in implantology. In the present work, dense and cellular solids have been obtained by this technique. Firstly, the sintering direction for obtaining dense solids has been studied and porosity, microstructure and mechanical properties resulting of the different sintering orientations have been evaluated. The vertical orientation in the sintering process generates higher porosity that results in poor fatigue properties, so a HIP treatment is proposed in order to overcome the problem. A conventional HIP treatment results in a homogenization of the properties independently of the sintering orientation. Secondly, a porous (Cellular) structure was obtained with a pore size of about 0.5 mm and an elevated interconnectivity. The structural and mechanical properties have been obtained by means of scanning electron microscopy and compression testing, resulting in very similar results to that obtained in commercial metallic cellular materials. © 2011 Published by Elsevier Ltd. Selection and peer-review under responsibility of ICM11 Key Words: Biomaterials, Selective Laser Sintering; Implantology. 1. INTRODUCTION Rapid prototyping techniques for the development of biomaterials are being nowadays widely used and are c

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