Anisotropic ultrasonic attenuation in an AA 5754 aluminum hot band

Chi Sing Man, Zhiqiang Cai, Kevin D. Donohue, Peixing Fei

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Herein a simple phenomenological theory that involves an effective viscosity tensor is developed for the analysis and interpretation of spectroscopic data of through-thickness ultrasonic resonance. Under this theory, the attenuation of each mode of through-thickness stress waves is proportional to the square of the resonance frequency, which indicates that this theory may be adequate for covering attenuation due to dislocation damping, but not for attenuation due to grain scattering. Ultrasonic attenuation of through-thickness shear waves in sheet samples of a continuous-cast AA 5754 aluminum hot band and its O-temper counterpart was measured with resonance EMATs. The frequency range in question was from 2 to 10 MHz. For the hot band, the attenuation of the two shear modes was found to be predominantly proportional to the square of the frequency. The viscosity constant pertaining to the fast shear mode was about 3 times that of the slow shear mode, suggesting a highly anisotropic dislocation structure in the hot band.

Original languageEnglish
Title of host publicationAluminum Wrought Products for Automotive, Packaging, and other Applic. - The James Morris Honorary Symp. - Proc. of Symp. sponsored by the Reactive Metals Committee of the LMD of The Minerals, Metals
Number of pages10
StatePublished - 2006
Event135th TMS Annual Meeting, 2006 - San Antonio, TX, United States
Duration: Mar 12 2006Mar 16 2006

Publication series

NameTMS Annual Meeting


Conference135th TMS Annual Meeting, 2006
Country/TerritoryUnited States
CitySan Antonio, TX


  • Dislocation damping
  • Ultrasonic attenuation
  • Ultrasound resonance spectroscopy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys


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