On the effect of hydrogen on the elastic moduli and acoustic loss behaviour of Ti-6Al-4V. Issue 22 (2nd August 2016)

• Record Type: Journal Article
• Authors: Driver, S. L.; Jones, N. G.; Stone, H. J.; Rugg, D.; Carpenter, M. A.
• Is Part Of: Philosophical magazine. Volume 96:Issue 22(2016)
• Page Start: 2311
• Page End: 2327
• Publication Date: 2016-08-02
• Subjects: Titanium alloys -- resonant ultrasound spectroscopy -- microstructure -- mobility -- hydrogen in metals -- internal friction; Condensed matter -- Periodicals; Physics -- Periodicals; Matière condensée -- Périodiques; Physique -- Périodiques; 530.41
• DOI: 10.1080/14786435.2016.1198054
• Languages: English
• ISSNs: 1478-6435

Abstract

Abstract : The elastic moduli and acoustic loss behaviour of Ti-6Al-4V (wt.%) in the temperature range 5–298 K have been studied using Resonant Ultrasound Spectroscopy. A peak in the acoustic dissipation was observed at 160 K within the frequency range 250–1000 kHz. Analysis of the data acquired in this study, coupled with complementary data from the literature, showed that this was consistent with a Snoek-like relaxation process with an associated activation energy of 23 3 kJ mol . However, the loss peak was broader than would be expected for a Snoek-like relaxation, and the underlying process was shown to have a spread of relaxation times. It is suggested that this effect arises as a result of variations in the strain experienced by the phase due to different local microstructural constraint by the bounding secondary phase.