Improvement of the fatigue life of lattice structures covered by a thin envelope for biomedical applications

Author:  A. T. Sola1, L. Weiss1, P. Laheurte1 and E. Fleury1 1 LEM3, UniversitĂ© Lorraine, 7 Rue FĂ©lix Savart, Metz, France
Source:  ICSP14 Milan
Doc ID:  2022104
Year of Publication:  2022
Abstract Additive manufacturing allows the production of parts of a high geometric shape complexity hardly realisable by other manufacturing techniques. Additive manufacturing is particularly suitable for the fabrication of scaffold-type structures, also named lattice structures, that are of interest in various fields. By covering these lattice structures by a thin envelope, the realised parts can be applied in the biomedical sector and more particularly as prostheses. The application of manufactured parts is still hindered by the presence of microstructural defects reducing considerably the mechanical properties. The objective of this study was thus two-fold: to investigate the fatigue properties of Ti-6Al-4V samples with lattice structures produced by additive manufacturing and to study the effect of SMAT (Surface Mechanical Attrition Treatment) on the improvement of the fatigue life. Keywords lattice, SMAT, additive manufacturing, fatigue life

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