# Microstructural evolution during martensitic transformations

Abstract:Martensitic transformations are diffusion-less structural phasetransformations where the crystal structure changes by smalldisplacements of atoms, as opposed to long-range diffusion. Suchtransformations are characterized by fascinating microstructures whichcrucially influence the effective mechanical properties. The evolutionof this microstructure under an external stress also plays an importantrole in the  "Shape Memory Effect". I will describe a Ginzburg-Landauframework to study the microstructural evolutionin martensites and discuss how the approach can be used to study themechanical properties and the shape memory effect in single crystals aswell as polycrystals. I will also briefly discuss our recent work wherewe have used the GL theory to understand the complex phasetransformations in steel.

Toronto Quantum Matter Seminars
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