Kartha, SivanCastán i Vidal, Maria TeresaKrumhansl, James A.Sethna, James P.2010-06-112010-06-1119910031-9007https://hdl.handle.net/2445/12859Many 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.4 p.application/pdfeng(c) American Physical Society, 1991Física de l'estat sòlidMaterialsPropietats magnètiquesSolid state physicsMaterialsMagnetic properties and materialsinfo:eu-repo/semantics/article60559info:eu-repo/semantics/openAccess