Ultrasonic studies of radiation damage in an aluminum-manganese alloy
Johnson, David Leroy
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https://hdl.handle.net/2142/25600
Description
Title
Ultrasonic studies of radiation damage in an aluminum-manganese alloy
Author(s)
Johnson, David Leroy
Issue Date
1978
Doctoral Committee Chair(s)
Granato, A.V.
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
ultrasonic studies
radiation damage
aluminum-manganese alloy
MHz friction technique
Language
en
Abstract
The MHz internal friction technique has been shown to provide accurate measurements of the properties of defects produced by a low dose of electron radiation. In spite of the optimum conditions for avoiding complications due to multiple interstitial and multiple solute atom complexes, the multiple
peak structure of the data indicated that more than one defect configuration
was present. This is in direct contrast with channeling measurements and the interpretation of Mossbauer effect measurements which indicated the defect trapping configuration was the <100> mixed dumbbell. Neither of the two existing models used in the interpretation of other experiments was capable of explaining the data. However, a third model incorporating the features of both is capable of accounting for the observed behavior.
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