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Measurement of near-surface ultrasonic absorption by thermo-emissivity

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1007/978-1-4684-4769-9_23
AuthorSearch for: ; Search for: 1
Affiliation
  1. National Research Council Canada. NRC Industrial Materials Institute
FormatText, Book Chapter
SubjectRayleigh wave; infrared detector; ultrasonic frequency; phase lead; thermal diffusion length
Abstract
It is generally recognized that ultrasonic absorption, i.e. the relaxation of mechanical energy into heat is related to mechanical properties for several materials. In particular, in polycrystalline metals and within the frequency range generally used in ultrasonic testing, absorption is mainly caused by thermoelastic losses, inter-granularthermal currents, magnetic domain wall motion, the relaxation of interstitials and the interaction with dislocations.1,2 Among these different mechanisms, the last three can be related (to a variable extent) to the strength of the metal and its state of stress or fatigue.
Publication date
PublisherSpringer
In
  • Nondestructive Methods for Material Property Determination: 289–297.
LanguageEnglish
Peer reviewedYes
NRC numberCNRC 21034
NRC-IGM83-231-067
NPARC number23004005
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Record identifier53479bee-280d-4e3d-b39f-f1907cba1841
Record created2018-09-14
Record modified2020-06-10
Date modified: