The influence of low-temperature annealing on the spectral acoustic characteristics of the 1515 sub-microcrystalline alloy

The influence of low-temperature annealing on the spectral acoustic characteristics of the 1515 sub-microcrystalline alloy

The acoustic characteristics of the 1515 aluminum sub-microcrystalline alloy that were obtained by equal channel angular pressing (ECAP) are investigated. It was found that the action of short-term (5, 10, and 15 min) low-temperature ( T = 0.4 T melt ) annealing substantially increased both the atte...

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Veröffentlicht in:Russian journal of nondestructive testing 2015-06, Vol.51 (6), p.374-378
Hauptverfasser: Mishakin, V. V., Perevezentsev, V. N., Shcherban’, M. Yu, Klyushnikov, V. A., Gracheva, T. A., Kuz’micheva, T. A.
Format: Artikel
Sprache:eng
Schlagworte:
Acoustic Methods
Acoustics
Annealing
Characterization and Evaluation of Materials
Chemistry and Materials Science
Equal channel angular pressing
Evolution
Grain boundaries
Materials Science
Melts
Nondestructive testing
Spectra
Structural Materials
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Zusammenfassung:The acoustic characteristics of the 1515 aluminum sub-microcrystalline alloy that were obtained by equal channel angular pressing (ECAP) are investigated. It was found that the action of short-term (5, 10, and 15 min) low-temperature ( T = 0.4 T melt ) annealing substantially increased both the attenuation coefficient and the velocity of longitudinal elastic waves. The observed effects may be explained by the structures of the nonequilibrium grain boundaries and their evolution during annealing.
ISSN:1061-8309
1608-3385
DOI:10.1134/S1061830915060066