Power-law statistics for avalanches in a martensitic transformation

Ahluwalia, Rajeev ; Ananthakrishna, G. (2001) Power-law statistics for avalanches in a martensitic transformation Physical Review Letters, 86 (18). pp. 4076-4079. ISSN 0031-9007

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Official URL: http://prl.aps.org/abstract/PRL/v86/i18/p4076_1

Related URL: http://dx.doi.org/10.1103/PhysRevLett.86.4076


We devise a two-dimensional model that mimics the recently observed power-law distributions for the amplitudes and durations of the acoustic emission signals observed during martensitic transformation [Vives et al., Phys. Rev. Lett. 72, 1694 (1994)]. We include a threshold mechanism, long-range interaction between the transformed domains, inertial effects, and dissipation arising due to the motion of the interface. The model exhibits thermal hysteresis and, more importantly, it shows that the energy is released in the form of avalanches with power-law distributions for their amplitudes and durations. Computer simulations also reveal morphological features similar to those observed in real systems.

Item Type:Article
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ID Code:72013
Deposited On:28 Nov 2011 05:16
Last Modified:28 Nov 2011 05:16

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