Phase field approach to interaction between phase transformations and plasticity at the nanoscale at large strains

V. I. Levitas^a, M. Javanbakht<sup>b

a</sup> Iowa State University, Departments of Aerospace Engineering, Mechanical Engineering, and Material Science and Engineering, Ames Laboratory, Division of Materials Science and Engineering
^b Isfahan University of Technology, Department of Mechanical Engineering

Abstract: In the paper, our recent phase field approach (PFA) to the interaction between phase transformations (PTs) and dislocations at the nanoscale is reviewed. It is developed at large strains as a nontrivial combination of our recent advanced PFAs to martensitic PTs and dislocation evolution. Finite element method (FEM) simulations are performed to solve the coupled phase-field and elasticity equations. The evolution of dislocations and high pressure phase in a nanograined material under pressure and shear is studied and utilized for interpretation of experimental results on plastic strain induce PTs under high pressure in rotational diamond anvil cell.

Keywords: phase field approach, phase transformations, dislocations, interaction, nanoscale.

UDC: 539.3, 519.6

Received: 19.05.2017
Revised: 14.09.2017

DOI: 10.22405/2226-8383-2017-18-3-366-380