Jerky elasticity: Avalanches and the martensitic transition in Cu74.08Al23.13Be2.79 shape-memory alloy

Autor(en)

Ekhard K H Salje, Johannes Koppensteiner, Marius Reinecker, Wilfried Schranz, Antoni Planes

Abstrakt

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(en)

Physik Nanostrukturierter Materialien, Physik Funktioneller Materialien

Externe Organisation(en)

University of Cambridge, Universitat Autònoma de Barcelona

Journal

Applied Physics Letters

Band

95

ISSN

0003-6951

DOI

https://doi.org/10.1063/1.3269578

Publikationsdatum

2009

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/cb88aaa6-2440-4664-9d65-3580f2b900e1