Magnetostrictive performance of additively manufactured CoFe rods using the LENS (TM) system

Journal Article · Tue May 01 00:00:00 EDT 2018 · AIP Advances

DOI:https://doi.org/10.1063/1.5007673· OSTI ID:1436428

Jones, Nicholas J.  ^[1]; Yoo, Jin-Hyeong ^[1]; Ott, Ryan T. ^[2]; Lambert, Paul K. ^[1]; Petculescu, Gabriela ^[3]; Simsek, Emrah ^[2]; Schlagel, Deborah  ^[2]; Lograsso, Thomas A. ^[4]

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1. Naval Surface Warfare Center, Bethesda, MD (United States). Physical Metallurgy and Fire Protection Branch
2. Ames Lab., Ames, IA (United States). Division of Materials Science & Engineering
3. Univ. of Louisiana at Lafayette, Lafayette, LA (United States). Dept. of Physics
4. Ames Lab., Ames, IA (United States). Division of Materials Science & Engineering; Iowa State Univ., Ames, IA (United States). Dept. of Materials Science and Engineering

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 Co_75.8Fe_24.2 and Co_63.7Fe_36.3 have been fabricated using the Laser engineered net shaping (LENS^TM) 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 Co₆₇Fe₃₃ single 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 (λ_s) 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.

• Research Organization: Ames Lab., Ames, IA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: AC02-07CH11358
• OSTI ID: 1436428
• Alternate ID(s): OSTI ID: 1411804
• Report Number(s): IS-J-9625; TRN: US1900181
• Journal Information: AIP Advances, Vol. 8, Issue 5; ISSN 2158-3226
• Publisher: American Institute of Physics (AIP)
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE