Phase-Field Reaction-Pathway Kinetics of Martensitic Transformations in a Model Fe3Ni Alloy

Abstract

A three-dimensional phase-field approach to martensitic transformations that uses reaction pathways in place of a Landau potential is introduced and applied to a model of Fe3Ni. Pathway branching involves an unbounded set of variants through duplication and rotations by the rotation point groups of the austenite and martensite phases. Path properties, including potential energy and elastic tensors, are calibrated by molecular statics. Acoustic waves are dealt with via a splitting technique between elastic and dissipative behaviors in a large-deformation framework. The sole free parameter of the model is the damping coefficient associated to transformations, tuned by comparisons with molecular dynamics simulations. Good quantitative agreement is then obtained between both methods.

4 pages, 3 figures

References in corpus (2)

• Microstructure and mechanical properties of constrained shape-memory alloy nanograins and nanowires
• Phase field simulations of coupled phase transformations in ferroelastic-ferroelastic nanocomposites

Cited by in corpus (6)

• Thermodynamically-consistent derivation and computation of twinning and fracture in brittle materials by means of phase-field approaches in the finite element method
• Application of Finite Strain Landau Theory To High Pressure Phase Transitions
• Reconstructive martensitic phase transitions: intermittency, anti-trasformation, plasticity, irreversibility
• Review on phase transformations, fracture, chemical reactions, and other structural changes in inelastic materials
• Crystal elasto-plasticity on the Poincaré half-plane
• Intermittency in crystal plasticity informed by lattice symmetry