Abstract
In this study, the ultrasonic resonance parameters of Ti6Al4V alloys under different heat treatments are measured by an impedance analyzer. The amplitude of the specimens is measured experimentally by means of optical microscope and image analysis software. These results show that the ultrasonic properties of Ti6Al4V alloys are closely related to β phase content and elastic modulus of the alloys. The highest volume fraction of the β phase appears in the specimen treated by solid solution treatment at 960 °C is 40.2%. These alloys present the lowest average elastic modulus (~99.69 GPa) and the minimum resonant frequency (55.06 kHz) and the highest average amplitude (21.48 µm) when the testing sample length is 41.25 mm. These findings can be used to guide the design of medical Ti6Al4V alloys for ultrasonic scalpels.
Highlights
Ti6Al4V alloy is a two-phase (α + β) alloy widely used in the biomedical field owing to its excellent biocompatibility [1]
It is clear that there is a strong dependence of the ultrasonic resonance frequency of the Ti6Al4V vibrator on the microstructure of the Ti6Al4V alloys
Samples treated by solid solution treatment at 960 ◦ C with 45.5 mm length show the lowest resonant frequency
Summary
Ti6Al4V alloy is a two-phase (α + β) alloy widely used in the biomedical field owing to its excellent biocompatibility [1]. In ultrasonic surgery, the Ti6Al4V alloy is widely used for ultrasonic scalpels, which require favorable biocompatibility, and excellent mechanical and ultrasonic properties [2]. Most of the current investigations focus on the effect of ultrasonic processing on the wear and fatigue behavior of this Ti6Al4V alloy [3,4,5], as well as the effect of microstructures on the ultrasonic wave velocity and attenuation coefficient of Titanium alloys [6,7]. We would like to mention that the resonant frequency and amplitude of ultrasonic scalpels are considered as the two most important physical parameters that affect the tissue fragmentation and coagulation in ultrasonic surgery [8]. Zainon [9] found that when the mechanical vibration of the particle acceleration of 5 × 104 × g (g is gravitational acceleration, g ≈ 10 m/s2 ) acts
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