Driving rate effects in avalanche-mediated, first-order phase transitions

We have studied the driving rate and temperature dependence of the power-law exponents that characterize the avalanche distribution in first-order phase transitions. Measurements of acoustic emission in structural transitions in Cu-Zn-Al and Cu-Al-Ni are presented. We show how the observed behaviour...

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Bibliographic Details
Published in:arXiv.org 2004-06
Main Authors: Perez-Reche, Francisco-Jose, Tadic, Bosiljka, Manosa, Lluis, Planes, Antoni, Vives, Eduard
Format: Article
Language:English
Subjects:
Acoustic emission testing
Aluminum
Avalanches
Computer simulation
Copper
Mathematical models
Nickel
Phase transitions
Temperature dependence
Variations
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Summary:We have studied the driving rate and temperature dependence of the power-law exponents that characterize the avalanche distribution in first-order phase transitions. Measurements of acoustic emission in structural transitions in Cu-Zn-Al and Cu-Al-Ni are presented. We show how the observed behaviour emerges within a general framework of competing time scales of avalanche relaxation, driving rate, and thermal fluctuations. We have confirmed our findings by numerical simulations of a prototype model.
ISSN:2331-8422
DOI:10.48550/arxiv.0406098