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Article
Magnetostrictive performance of additively manufactured CoFe rods using the LENS(TM) system
Ames Laboratory Accepted Manuscripts
  • Nicholas J. Jones, Naval Surface Warfare Center
  • Jin-Hyeong Yoo, Naval Surface Warfare Center
  • Ryan T. Ott, Ames Laboratory
  • Paul K. Lambert, Naval Surface Warfare Center
  • Gabriela Petculescu, University of Louisiana at Lafayette
  • Emrah Simsek, Ames Laboratory
  • Deborah Schlagel, Ames Laboratory
  • Thomas A. Lograsso, Iowa State University and Ames Laboratory
Publication Date
1-1-2018
Department
Ames Laboratory; Materials Science and Engineering
Report Number
IS-J 9625
DOI
10.1063/1.5007673
Journal Title
AIP Advances
Abstract

Magnetostrictive materials exhibit a strain in the presence of a variable magnetic field. While they normally require large, highly oriented crystallographic grains for high strain values, metal additive manufacturing (3D printing) may be able to produce highly textured polycrystalline rods, with properties comparable to those manufactured using the more demanding free standing zone melting (FSZM) technique. Rods of Co75.8Fe24.2 and Co63.7Fe36.3 have been fabricated using the Laser engineered net shaping (LENSTM) system to evaluate the performance of additively manufactured magnetic and magnetostrictive materials. The 76% Co sample showed an average magnetostriction (λ) of 86 ppm at a stress of 124 MPa; in contrast, the 64% Co sample showed only 27 ppm at the same stress. For direct comparison, a Co67Fe33single crystal disk, also measured as part of this study, exhibited a magnetostriction value of 131 and 91 microstrain in the [100] and [111] directions, respectively, with a calculated polycrystalline value (λs) of 107 microstrain. Electron back scattered diffraction (EBSD) has been used to qualitatively link the performance with crystallographic orientation and phase information, showing only the BCC phase in the 76% Co sample, but three different phases (BCC, FCC, and HCP) in the 64% Co sample.

Language
en
Publisher
Iowa State University Digital Repository, Ames IA (United States)
Citation Information
Nicholas J. Jones, Jin-Hyeong Yoo, Ryan T. Ott, Paul K. Lambert, et al.. "Magnetostrictive performance of additively manufactured CoFe rods using the LENS(TM) system" Vol. 8 Iss. 5 (2018) p. 056403
Available at: http://works.bepress.com/thomas_lograsso/244/