Jerky elasticity: Avalanches and the martensitic transition in Cu74.08Al23.13Be2.79 shape-memory alloy
- Author(s)
- Ekhard K H Salje, Johannes Koppensteiner, Marius Reinecker, Wilfried Schranz, Antoni Planes
- Abstract
Jerky elasticity was observed by dynamical mechanical analyzer measurements in a single crystal of the shape memory alloy Cu(74.08)Al(23.13)Be(2.79). Jerks appear as spikes in the dissipation of the elastic response function and relate to the formation of avalanches during the transformation between the austenite and the martensite phase. The statistics of the avalanches follows the predictions of avalanche criticality P(E) proportional to E(-epsilon) where P(E) is the probability of finding an avalanche with the energy E. This result reproduces, within experimental uncertainties, previous findings by acoustic emission techniques.
- Organisation(s)
- Physics of Nanostructured Materials, Physics of Functional Materials
- External organisation(s)
- University of Cambridge, Universitat Autònoma de Barcelona
- Journal
- Applied Physics Letters
- Volume
- 95
- ISSN
- 0003-6951
- DOI
- https://doi.org/10.1063/1.3269578
- Publication date
- 2009
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103018 Materials physics
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/jerky-elasticity-avalanches-and-the-martensitic-transition-in-cu7408al2313be279-shapememory-alloy(cb88aaa6-2440-4664-9d65-3580f2b900e1).html