Deformation behavior of polycrystalline Galfenol at elevated temperatures

Leon M. Cheng; Allison E Nolting; Benoit Voyzelle; Claude Galvani

doi:10.1117/12.720664

20 April 2007 Deformation behavior of polycrystalline Galfenol at elevated temperatures

Leon M. Cheng, Allison E Nolting, Benoit Voyzelle, Claude Galvani

Proceedings Volume 6526, Behavior and Mechanics of Multifunctional and Composite Materials 2007; 65262N (2007) https://doi.org/10.1117/12.720664
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2007, San Diego, California, United States

Abstract

Magnetostrictive Galfenol (Fe-Ga) is a promising new active material. Single crystals of Galfenol have been shown to exhibit up to 400 ppm magnetostrictive strains with saturating fields of several hundred oersteds. Its robustness and ability to actuate in either tension or compression allows for new actuator and sensor designs. However, due to the high permeability of Galfenol, it needs to be in thin sheet form for many device applications to minimize eddy current losses. Work is underway to develop conventional rolling processes to produce large quantities of thin Galfenol sheet, while retaining a preferred <100> crystallographic texture to optimize magnetostrictive performance. Knowledge of deformation behavior at elevated temperature is crucial to understanding formability and crystallographic texture evolution during rolling. In this work, the high-temperature plasticity and the deformation behavior of polycrystalline Galfenol were investigated using conventional axial compression tests and rolling experiments. As the temperature increased, significant softening of the material occurred in the temperature range from about 450°C to 800°C. The results also suggested that significant dynamic recovery and recrystallization occurred during deformation at above 800°C.

Citation Download Citation

Leon M. Cheng, Allison E Nolting, Benoit Voyzelle, and Claude Galvani "Deformation behavior of polycrystalline Galfenol at elevated temperatures", Proc. SPIE 6526, Behavior and Mechanics of Multifunctional and Composite Materials 2007, 65262N (20 April 2007); https://doi.org/10.1117/12.720664

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available