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Presentation
Magnetic and Mechanical Properties of Polycrystalline Galfenol
Ames Laboratory Conference Papers, Posters, and Presentations
  • Eric M. Summers, Etrema Products, Inc.
  • Thomas A. Lograsso, Iowa State University
  • Jonathan D. Snodgrass, Etrema Products, Inc.
  • Julie C. Slaughter, Etrema Products, Inc.
Document Type
Conference Proceeding
Disciplines
Conference
Smart Structures and Materials 2004: Active Materials: Behavior and Mechanics
Publication Date
7-21-2004
DOI
10.1117/12.539781
Geolocation
(32.7153292, -117.15725509999999)
Abstract

The Zone Melt Crystal Growth Method (FSZM) has been used to produce polycrystalline Galfenol specimens, Fe81.6Ga18.4, with preferred {100} orientation. This crystal growth technique has advantages over conventional Bridgman methods in that zone rates used were at least an order of magnitude greater; 350 mm/hr versus 2-4 mm/hr. This material had measured magnetostrictions ranging from 168 ppm to 220 ppm compared to 290 ppm for a single crystal with a similar composition. It was discovered that upon machining a large increase in magnetostriction occurred, ~15%. Using Orientation Imaging Microscopy (OIM) techniques it was shown that the magnetostriction increase is due to the removal of off-axis grains located on the circumference of the FSZM samples. The room temperature mechanical properties were measured to be 72.4 GPa-86.3 GPa modulus of elasticity, 348 MPa-370 MPa ultimate strength, and elongation values of 0.81% - 1.2% depending upon zoning conditions.

Comments

This article is from Smart Structures and Materials 2004: Active Materials: Behavior and Mechanics 448, (2004): p. 448, doi:10.1117/12.539781

Copyright 2004 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

http://dx.doi.org/10.1117/12.539781

Copyright Owner
Society of Photo Optical Instrumentation Engineers
Language
en
Citation Information
Eric M. Summers, Thomas A. Lograsso, Jonathan D. Snodgrass and Julie C. Slaughter. "Magnetic and Mechanical Properties of Polycrystalline Galfenol" San Diego, CA(2004)
Available at: http://works.bepress.com/thomas_lograsso/174/