Vlastnosti materiálů pro biomedicínské aplikace připravených selektivním laserovým tavením titanových slitin

Abstract

In the theoretical part of this work was analyzed the problem of preparation of implants from titanium materials by selective laser melting. Parameters influencing the nature, surface characteristics and mechanical properties of additive manufacturing technology products were discussed. In the experimental part the structural and mechanical properties of the products prepared by this technology were evaluated, both before and after heat treatment. The results show that the samples exhibited high mechanical values even though they contained a relatively high porosity. Anisotropy of tensile and compressive strength was observed, which was related to the occurrence of pores. The causes of porosity have been outlined. By combining martensite needles, microcracks and residual stress, it is also possible to explain the fragile nature of breakage before heat treatment. Through the transformation of martensite alfa΄ to the lamellar structure alfa + beta by the heat treatment, the plastic properties were improved.