Microstructural and Mechanical Characterization of a Custom-Built Implant Manufactured in Titanium Alloy by Direct Metal Laser Sintering

Custom-built implants manufacture has always presented difficulties which result in high cost and complex fabrication, mainly due to patients’ anatomical differences. The solution has been to produce prostheses with different sizes and use the one that best suits each patient. Additive manufacturing...

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Bibliographic Details
Published in:Advances in Mechanical Engineering 2014-01, Vol.6, p.945819
Main Authors: Larosa, Maria Aparecida, Jardini, André Luiz, Zavaglia, Cecília Amélia de Carvalho, Kharmandayan, Paulo, Calderoni, Davi Reis, Maciel Filho, Rubens
Format: Article
Language:English
Subjects:
Biomedical materials
Colleges & universities
Corrosion resistance
Fractures
Joint replacement surgery
Laser sintering
Lasers
Manufacturing
Mechanical properties
Microstructure
Patients
Powder metallurgy
Surgical implants
Tensile tests
Titanium base alloys
Ultimate tensile strength
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Summary:Custom-built implants manufacture has always presented difficulties which result in high cost and complex fabrication, mainly due to patients’ anatomical differences. The solution has been to produce prostheses with different sizes and use the one that best suits each patient. Additive manufacturing technology, incorporated into the medical field in the late 80's, has made it possible to obtain solid biomodels facilitating surgical procedures and reducing risks. Furthermore, this technology has been used to produce implants especially designed for a particular patient, with sizes, shapes, and mechanical properties optimized, for different areas of medicine such as craniomaxillofacial surgery. In this work, the microstructural and mechanical properties of Ti6Al4V samples produced by direct metal laser sintering (DMLS) are studied. The microstructural and mechanical characterizations have been made by optical and scanning electron microscopy, X-ray diffraction, and microhardness and tensile tests. Samples produced by DMLS have a microstructure constituted by hexagonal α′ martensite with acicular morphology. An average microhardness of 370 HV was obtained and the tensile tests showed ultimate strength of 1172 MPa, yield strength of 957 MPa, and elongation at rupture of 11%.
ISSN:1687-8132
1687-8140
1687-8140
1687-8132
DOI:10.1155/2014/945819