Premium
Additiv verarbeitete TiAl6Nb7‐Legierung für die medizintechnische Anwendung
Author(s) -
Hein M.,
Hoyer K.P.,
Schaper M.
Publication year - 2021
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.202000288
Subject(s) - materials science , ultimate tensile strength , acicular , microstructure , titanium alloy , alloy , vickers hardness test , electron backscatter diffraction , scanning electron microscope , selective laser melting , tensile testing , energy dispersive x ray spectroscopy , titanium , metallurgy , composite material
Laser beam melting (LBM) is an advanced manufacturing technology providing special features and the possibility to produce complex and individual parts directly from a CAD model. TiAl6V4 is the most common used titanium alloy particularly in biomedical applications. TiAl6Nb7 shows promising improvements especially regarding biocompatible properties due to the substitution of the hazardous vanadium. This work focuses on the examination of laser beam melted TiAl6Nb7. For microstructural investigation scanning electron microscopy including energy‐dispersive x‐ray spectroscopy as well as electron backscatter diffraction are utilized. The laser beam melted related acicular microstructure as well as the corresponding mechanical properties, which are determined by hardness measurements and tensile tests, are investigated. The laser beam melted alloy meets, except of breaking elongation A , the mechanical demands like ultimate tensile strength R m , yield strength R p0.2 , Vickers hardness HV of international standard ISO 5832‐11. Next steps contain comparison between TiAl6Nb7 and TiAl6V4 in different conditions. Further investigations aim at improving mechanical properties of TiAl6Nb7 by heat treatments and assessment of their influence on the microstructure as well as examination regarding the corrosive behavior in human body‐like conditions.