Phase field simulations of coupled phase transformations in ferroelastic-ferroelastic nanocomposites

Abstract

We use phase field simulations to study composites made of two different ferroelastics (e.g., two types of martensite). The deformation of one material due to a phase transformation can elastically affect the other constituent and induce it to transform as well. We show that the phase transformation can then occur above its normal critical temperature and even higher above this temperature in nanocomposites than in bulk composites. Microstructures depend on temperature, on the thickness of the layers, and on the crystal structure of the two constituents -- certain nanocomposites exhibit a great diversity of microstructures not found in bulk composites. Also, the periodicity of the martensite twins may vary over 1 order of magnitude based on geometry. keywords: Ginzburg-Landau, martensitic transformation, multi-ferroics, nanostructure, shape-memory alloy

8 pages, 15 figures

References in corpus (4)

• Disorder-Driven Pretransitional Tweed in Martensitic Transformations
• Interplay between diffusive and displacive phase transformations: TTT diagrams and microstructures
• Microstructure and mechanical properties of constrained shape-memory alloy nanograins and nanowires
• Effect of lattice mismatch-induced strains on coupled diffusive and displacive phase transformations

Cited by in corpus (2)

• Phase-Field Reaction-Pathway Kinetics of Martensitic Transformations in a Model Fe3Ni Alloy
• Three Dimensional Non-Isothermal Ginzburg-Landau Phase-Field Model for Shape Memory Alloys