Thermodynamics of stress-induced ferroelastic transitions: Influence of anisotropy and disorder
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Data publicació2010-06-07
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Abstract
Stress-induced stress-strain constitutive behavior has been studied in detail in ferroelastic martensites. It has
been found that the weights of the long-range anisotropic interactions and of the disorder are important to
determine the fine structure of the stress-strain curves. As experiments show, a wide variety of behaviors has
been observed. A decrease of anisotropy and/or increase in the disorder results in changes in the temperature
range where pseudoplastic and superelastic regimes are observed. Also, a smoothing of the stress-induced
ferroelastic transition, accompanied with a decrease in the transition stress and the hysteresis area, is found.
However, Clausius-Clapeyron slope has been observed not to depend on the specific values of anisotropy and
disorder. This is in general agreement with experimental results in different alloy families, although some
particular features differ from those in experiments. Elastocaloric effect has been studied as well. Varying the
anisotropy slightly modifies the shape of the entropy change-temperature curve but the magnitude of the
entropy change remains essentially constant.
CitacióLloveras, P. [et al.]. Thermodynamics of stress-induced ferroelastic transitions: Influence of anisotropy and disorder. "Physical review. B, solid state", 07 Juny 2010, vol. 81, núm. 21, p. 214105-1-214105-8.
ISSN0556-2805
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