JPL Technical Report Server

Magnetoelastic vibration damping properties of TbDy alloys

Show simple item record Dooley, J. A. en_US Good, N. R. en_US White, C. V. en_US Leland, R. S. en_US 2004-09-17T19:43:40Z 2004-09-17T19:43:40Z 2002-10-28 en_US
dc.identifier.citation Transducing Materials and Devices en_US
dc.identifier.citation Brugge, Belgium en_US
dc.identifier.clearanceno 02-2850 en_US
dc.description.abstract Damping of axial and bending mode vibrations in giant magnetoelastic polycrystalline TbDy alloys was studied at cryogenic temperatures. All specimens of TbDy were arc-melted in the proper composition ratio and dropped into a chilled copper mold. Additional treatments consisted of cold plane-rolling to induce crystallographic texture and then heat-treating to relieve internal stress. Mechanical hysteretic losses were measured at various strains, frequencies, and loading configurations down to 77 K. Both as-cast and textured polycrystalline TbDy samples were tested along with an aluminum specimen for comparison. Loss factors at multiple natural vibration frequencies of the samples were measured for axial modes. Larger damping rates were measured for axial mode vibrations than for bending mode vibrations, possibly reflecting the larger specimen volume contributing to magnetoelastic damping. At LN2 temperatures TbDy materials demonstrated q > 0.05 at 0.01 Hz and q > 0.1 at higher frequencies from 0.6-1.5 kHz. en_US
dc.format.extent 1825768 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.subject.other magnetoelastic TbDy en_US
dc.title Magnetoelastic vibration damping properties of TbDy alloys en_US

Files in this item

This item appears in the following Collection(s)

Show simple item record



My Account