Artículo
Dynamic heat flux experiments in Cu67.64Zn 16.71Al15.65: Separating the time scales of fast and ultra-slow kinetic processes in martensitic transformations
Autor/es | Romero Landa, Francisco Javier
Manchado Ligioiz, Julia Martín Olalla, José María Gallardo Cruz, María del Carmen Salje, E.K.H. |
Departamento | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Fecha de publicación | 2011 |
Fecha de depósito | 2017-11-28 |
Publicado en |
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Resumen | Crackling noise and avalanches during the martensite phase transformation of Cu67.64Zn16.71Al15.65 were investigated. Heat flux measurements with extremely slow heating rates of 0.005 Kh -1 allowed sufficient separation ... Crackling noise and avalanches during the martensite phase transformation of Cu67.64Zn16.71Al15.65 were investigated. Heat flux measurements with extremely slow heating rates of 0.005 Kh -1 allowed sufficient separation between the continuous background and the avalanche jerks. The jerk enthalpy is below 3 of the total transformation enthalpy. The crackling noise follows power law behavior with an energy exponent near ε=1.8. The jerks are almost uncorrelated with approximately a Poisson distribution of the waiting times between jerks. Quantitative analysis showed a scaling behavior with p(wt) ∼ wt (γ-1)exp(-wt/τ)n with γ=0.7 and n ≈ 1. |
Agencias financiadoras | Ministerio de Educación y Ciencia (MEC). España |
Identificador del proyecto | FIS2006-04045 |
Cita | Romero Landa, F.J., Manchado Ligioiz, J., Martín Olalla, J.M., Gallardo Cruz, M.d.C. y Salje, E.K.H. (2011). Dynamic heat flux experiments in Cu67.64Zn 16.71Al15.65: Separating the time scales of fast and ultra-slow kinetic processes in martensitic transformations. Applied Physics Letters, 99, 011906-1-011906-3. |
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