Affiliations: Department of Mechanical Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung, Taiwan
Correspondence:
[*]
Corresponding author: Tao-Hsing Chen, Department of Mechanical Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 807, Taiwan. E-mail:[email protected]
Abstract: This study uses a split-Hopkinson bar to investigate the
mechanical response and microstructural evolution of Ti-13Zr-13Nb biomedical
alloy under dynamic loading. Dynamic compression tests are performed at room
temperature (25°C) and 500°C under strain rates of 900 s -
1, 1900 s - 1 and 2800 s - 1, respectively. It indicates that the
mechanical response of Ti-13Zr-13Nb biomedical alloy is very influenced by
strain rate and temperature. The plastic flow stress and strain rate
sensitivity increase with the increasing strain rate but decrease with
increasing temperature. It reveals that the Ti-13Zr-13Nb alloy fail due to
the intensive localized shearing by fracture observation. Furthermore, TEM
observations reveal that the dislocation density increases with an
increasing strain rate, but decrease with increasing temperature.
