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Volume 7, Issue 2 (Suppl) J Biotechnol Biomater
ISSN: 2155-952X JBTBM, an open access journal Biomaterials 2017
March 27-28, 2017
2nd Annual Conference and Expo on
March 27-28, 2017 Madrid, Spain
Margarita A Khimich et al., J Biotechnol Biomater 2017, 7:2 (Suppl)
Influence of selective laser melting mode on the structure and phase composition of Ti-Nb alloy
Margarita A Khimich, Anna Yu Eroshenko, Zhanna G Kovalevskaya, Alexander A Saprykin and Yurii P Sharkeev
ISPMS SB of RAS, Russian Federation
Ti-Nb alloys are perspective for implants production. Titanium and its alloys have high elastic modulus (100-120 GPa). Due
to their features alloys of Ti with (40-45) wt. % Nb have modulus close to that of bone. Selective laser melting (SLM) allows
obtaining of low-modulus Ti-Nb alloys and items of complex shape. Change of SLM parameters affects the size of structural elements
and phase composition of resulting product. The purpose of this study was to investigate influence of SLM parameter change on the
structure and phase composition of Ti-(40-45) wt. % Nb alloy. 3-D specimens obtained in Yurga Institute of Technology (Russia)
on “VARISKAF-100MVS” installation were investigated. To obtain the alloy the composite powder of titanium and niobium was
obtained by mechanical activation of titanium and niobium powders mixture in AGO-2C ball mill (AltSTU, Barnaul, Russia) and was
layered on titanium substrate. After activation composite powder was annealed in vacuum at 500°C during one hour. The thickness
of each layer was 0.05 mm. Melting process was carried out in Ar atmosphere. Specimens were formed with the laser beam of 80
W-power. The spot diameter was 150 µm, scanning step was 0.4 mm. As a changed parameter laser beam scanning velocity was
selected. It was changed in the range 40-70 mm/sec with the step of 10 mm/sec. The results of investigation have shown that the alloy
obtained by SLM has an elemental composition of Ti-45 wt. % Nb. Powder is completely melted and crystallized during SLM. The
structure is represented by two phases. They are the main β-solid solution of titanium and niobium and α''-Ti containing Nb. The
microstructure contains zones with fine and medium grains. Shrinkage and gas pores are observed in specimens.
Biography
Margarita A Khimich graduated in Physics, and is a Technical Faculty of National Research Tomsk State University. She earned a Bachelor of Technical Physics in
2013. She presented her Master’s thesis devoted to alloys of Ti-Nb system and severe plastic deformation of Ti-Nb alloy in 2015. Currently, she is a postgraduate
student at National Research Tomsk State University and also a Researcher of the Laboratory of Physics of Nanostructured Biocomposites, Institute of Strength
Physics and Materials Science. She takes part in the project of Russian Science Foundation devoted to selective laser melting of biocompatible Ti-Nb alloys.