Investigation on manufacturability of bone plates used in humerus fractures by additive manufacturing method


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AYCAN M. F.

JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, vol.34, no.4, pp.2007-2016, 2019 (SCI-Expanded) identifier identifier

Abstract

In this study, the manufacturability of Ti6Al4V titanium alloyed bone plates used in fracture of humerus by additive manufacturing method was surveyed. In order to determine ideal production conditions for additive manufacturing method, the effect of building direction and preheating on mechanical properties was investigated. All the samples were manufactured by using same process parameters and heat treated in same conditions after production. The samples were manufactured on four different building directions (vertical, horizontal, 1x45, 2x45) and two preheating conditions (0 and 200 degrees C). After the heat treatment process completed for stress relieving, they were tested in axial tensile testing and three-point bending testing statically and dynamically. While, the orientation did not make a significant effect on mechanical properties, the strength of samples was affected negatively with preheating process. However, it was seen that the ductility and toughness of samples increased via the preheating process. The sample manufactured with preheating in vertical direction had the highest mechanical properties when compared to the other samples. Thus, the bone plates were manufactured on this condition and heat treated, then they were tested in four-point bending testing according to the ASTM F382. It was concluded that the bone plates manufactured by additive manufacturing method had better bending strength and fatigue behavior. They may be an alternative choice for fixation treatments of humerus fractures in clinical applications.