Modeling the essential atomistic influence in the phase transformation dynamics of shape memory materials

D. Roy Mahapatra; R. V. N. Melnik

doi:10.1117/12.658883

6 April 2006 Modeling the essential atomistic influence in the phase transformation dynamics of shape memory materials

D. Roy Mahapatra, R. V. N. Melnik

Proceedings Volume 6170, Smart Structures and Materials 2006: Active Materials: Behavior and Mechanics; 61700Y (2006) https://doi.org/10.1117/12.658883
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2006, San Diego, California, United States

Abstract

A Ginzburg-Landau free energy model of multivariant phase transformation in shape memory alloy has been developed. This paper is focused on linking the developed microscopic model with the atomistic reordering process which finally give rise to self-accommodating microstructure. It is analyzed how the kinetics influences the computation of stress-temperature induced dynamics of phase transformation in microscopic and larger length-scales without attempting to solve a molecular dynamic problem in a coupled manner. A variational approach is adopted and phase transformation in Ni-Al thin film is simulated. The simulations capture a qualitative picture of the onset of microstructure formation.

Citation Download Citation

D. Roy Mahapatra and R. V. N. Melnik "Modeling the essential atomistic influence in the phase transformation dynamics of shape memory materials", Proc. SPIE 6170, Smart Structures and Materials 2006: Active Materials: Behavior and Mechanics, 61700Y (6 April 2006); https://doi.org/10.1117/12.658883

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