Internal friction due to negative stiffness in the indium–thallium martensitic phase transformation
- 21 September 2006
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine
- Vol. 86 (27), 4285-4303
- https://doi.org/10.1080/14786430500479738
Abstract
Internal friction and dynamic shear modulus in an indium–21 at.% thallium alloy were measured as functions of frequency and cooling rate using broadband viscoelastic spectroscopy during the martensitic transformation which occurs in this material occurs around 50°C. Microstructural evolution of martensitic bands was captured using time-lapse optical microscopy. The amplitude of damping peaks due to the temperature-induced transformation in the polycrystalline alloy was found to exceed those reported by others for single crystals of similar alloy compositions, in contrast to the usual reduction in damping in polycrystals. The high temperature portion of the damping peak occurs before martensitic bands are observed; therefore this portion cannot be due to interfacial motion. Constrained negative stiffness of the grains can account for this damping, as well as for amplification of internal friction peaks in these polycrystals and for sigmoid-shaped anomalies in the shear modulus at high cooling rates. Surface features associated with a previously unreported pre-martensitic phenomenon are seen at temperatures above martensite-start.Keywords
This publication has 35 references indexed in Scilit:
- Internal Friction Study of a Composite with a Negative Stiffness ConstituentJournal of Materials Research, 2005
- Extreme stiffness systems due to negative stiffness elementsAmerican Journal of Physics, 2003
- Resonant ultrasound spectroscopy for measurement of mechanical damping: Comparison with broadband viscoelastic spectroscopyReview of Scientific Instruments, 2000
- Viscoelastic behaviour in indium-tin alloys over a wide range of frequencies and timesPhilosophical Magazine Letters, 1996
- Analysis of dissipation of a burst-type martensite transformation in a Fe-Mn alloy by internal friction measurementsPhysical Review B, 1996
- Pretransformation twinning in In-Tl alloysPhysical Review B, 1991
- Internal friction in In“Tl alloysScripta Metallurgica et Materialia, 1990
- Premartensitic phenomena in InTl alloys and the role of the fermi surfaceScripta Metallurgica, 1984
- Relations between the premartensitic instability and the martensite structure in TiNiScripta Metallurgica, 1971
- Viscoelastic Behavior of Heterogeneous MediaJournal of Applied Mechanics, 1965