Multiscale model for phase transformation in magnetic shape memory alloy single crystals

Vesselin Stoilov

doi:10.1117/12.659659

6 April 2006 Multiscale model for phase transformation in magnetic shape memory alloy single crystals

Vesselin Stoilov

Proceedings Volume 6170, Smart Structures and Materials 2006: Active Materials: Behavior and Mechanics; 61701A (2006) https://doi.org/10.1117/12.659659
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2006, San Diego, California, United States

Abstract

This paper investigates the nano-macro transition in magnetic shape memory alloy(MSMA) thin films using a recently developed sharp phase front-based three-dimensional (3D) constitutive model outlined by Stoilov (JSMS 2005), and originally proposed in the 1D context by Stoilov and Bhattacharyya (Acta Mat 2002). The key ingredient in the model is the recognition of martensitic variants as separate phases in a MSMA domain. Evolution of the interface between these phases is taken as an indicator of the process of reorientation in progress. A formulation of the Helmholtz free energy potential based on Ising model has been derived. The implications of the external magnetic field on the initiation of phase transformation are studied for various mechanical loading modes.

Citation Download Citation

Vesselin Stoilov "Multiscale model for phase transformation in magnetic shape memory alloy single crystals", Proc. SPIE 6170, Smart Structures and Materials 2006: Active Materials: Behavior and Mechanics, 61701A (6 April 2006); https://doi.org/10.1117/12.659659

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