Journal
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
Volume 3, Issue 8, Pages 559-564Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmbbm.2010.06.007
Keywords
Titanium alloy; Microstructure; Mechanical properties; Corrosion tests
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In this study, a new Ti-25Ta-25Nb (mass%) beta alloy was synthesised by cold crucible semi-levitation melting. This technique made it possible to obtain homogeneous ingots although the elements used have very different melting points. After melting, a thermo-mechanical treatment was applied in order to obtain a perfectly recrystallised beta microstructure. For this alloy composition, the tensile tests showed a very low Young's modulus associated with an important super-elastic behaviour, which contributes to decrease the elastic modulus under stress and to increase the recoverable strain. On the other hand, the corrosion tests, which were carried out in a neutral Ringer solution, indicated a corrosion resistance higher than that of the commercially pure CP Ti alloy. These results show that this new alloy possesses all the characteristics necessary for its long-term use in medical implants. (C) 2010 Elsevier Ltd. All rights reserved.
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