Characterization of annealing in polycrystalline copper using harmonic generation technique

Sensitivity of nonlinear ultrasonic method towards isothermal annealing in pure copper is investigated in this study. It was reported that, recovery, recrystallization and grain growth associated with annealing has profound influence on nonlinearity parameter. Presence of precipitates and secondary...

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Bibliographic Details
Main Authors: Mini, R S, Balasubramaniam Krishnan, Ravindran Parag
Format: Conference Proceeding
Language:English
Subjects:
Annealing
Copper
Grain growth
Harmonic generations
Isothermal annealing
Linearity
Metallography
Nonlinearity
Parameters
Precipitates
Recrystallization
Ultrasonic testing
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Summary:Sensitivity of nonlinear ultrasonic method towards isothermal annealing in pure copper is investigated in this study. It was reported that, recovery, recrystallization and grain growth associated with annealing has profound influence on nonlinearity parameter. Presence of precipitates and secondary phase particles, and its effect on nonlinearity parameter was considered by many authors. However, in this study, focus is on the influence of grain-growth on nonlinearity parameter. Variation of non-linearity parameter, β, with different holding durations were analyzed. All the samples were annealed at a temperature above its recrystallization temperature. Further, metallography studies as well as hardness measurements were performed to understand the relationship between microstructural changes and ultrasonic nonlinearity parameter.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4864885