Theory and Computation of Martensitic Microstructure
Bo Li
Department of Mathematics, University of Maryland College Park
Tuesday, March 25, 2003 13:00-14:00,
Room 145, NIST North (820)
Gaithersburg
Tuesday, March 25, 2003 11:00-12:00,
Room 4511
Boulder
Abstract:
Martensitic crystals such as shape memory alloys are a class
of smart material that can undergo diffusionless, structural,
reversible, solid-to-solid phase transformations. Such martensitic
transformations are characterized by the exhibition of martensitic
microstructures that are fine-scale mixtures of distinct but
coherent martensitic variants. In this talk, both experimental
results and nonconvex energy minimization properties of martensitic
microstructures will be first reviewed. A mathematical theory of
the stability of laminated martensitic microstructures with its
application to the numerical analysis of such microstructures will
be then presented. Numerical models and simulation results of a
martensitic microstructure near an interface between a laminate
and a single variant that has been observed in a series of biaxial
loading experiments will be finally described.
Contact: A. J. KearsleyNote: Visitors from outside NIST must contact
Robin Bickel; (301) 975-3668;
at least 24 hours in advance.
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