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Title: Preisach modeling of hysteresis for a pseudoelastic Cu-Zn-Al single crystal
Author: Ortín, Jordi, 1959-
Keywords: Ciència dels materials
Equacions d'estat
Regla de les fases i equilibri
Transformacions de fase (Física estadística)
Materials science
Equations of state
Phase rule and equilibrium
Phase transformations (Statistical physics)
Issue Date: 1-Feb-1992
Publisher: American Institute of Physics
Abstract: Stress-strain trajectories associated with pseudoelastic behavior of a Cu¿19.4 Zn¿13.1 Al (at.%) single crystal at room temperature have been determined experimentally. For a constant cross-head speed the trajectories and the associated hysteresis behavior are perfectly reproducible; the trajectories exhibit memory properties, dependent only on the values of return points, where transformation direction is reverted. An adapted version of the Preisach model for hysteresis has been implemented to predict the observed trajectories, using a set of experimental first¿order reversal curves as input data. Explicit formulas have been derived giving all trajectories in terms of this data set, with no adjustable parameters. Comparison between experimental and calculated trajectories shows a much better agreement for descending than for ascending paths, an indication of a dissymmetry between the dissipation mechanisms operative in forward and reverse directions of martensitic transformation.
Note: Reproducció del document publicat a:
It is part of: Journal of Applied Physics, 1992, vol. 71, núm. 3, p. 1454-1461
Related resource:
ISSN: 0021-8979
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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