Title:
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The Spin-glass nature of tweed precursors in martensitic transformations
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Author:
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Kartha, Sivan; Castán i Vidal, Maria Teresa; Krumhansl, James A.; Sethna, James P.
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Other authors:
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Universitat de Barcelona |
Abstract:
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Many displacive solid-solid transformations, despite being first order, show pronounced precursor effects, such as the mesoscopic, micron-scale, ‘‘tweed’’ pattern seen in shape-memory alloys. We model this tweed theoretically using a nonlinear, nonlocal elastic free energy, and argue that quenched concentration inhomogeneities drive the local tweed modulations. We report (1) the construction of a model for {11}/〈11¯〉 shear transformations in square systems, (2) a simulation including concentration inhomogeneities, and (3) a mapping of the disordered 2D martensite onto an infinite-range spin model, identifying tweed with the spin-glass phase. |
Subject(s):
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-Física de l'estat sòlid -Materials -Propietats magnètiques -Solid state physics -Materials -Magnetic properties and materials |
Rights:
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(c) American Physical Society, 1991
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Document type:
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Article Article - Published version |
Published by:
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American Physical Society
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