Measurement of Elastic and Plastic Unloading Wave Profiles in 2024‐T4 Aluminum Alloy
作者:
A. S. Kusubov,
M. van Thiel,
期刊:
Journal of Applied Physics
(AIP Available online 1969)
卷期:
Volume 40,
issue 9
页码: 3776-3780
ISSN:0021-8979
年代: 1969
DOI:10.1063/1.1658271
出版商: AIP
数据来源: AIP
摘要:
Velocities for one‐dimensional release waves in 2024‐T4 aluminum alloy have been obtained between 30 and 132 kbar. Stress‐time records were obtained with piezoresistive manganin gauges. The release wave clearly showed the existence of two release systems. The leading edge of the release wave was 27% faster than the bulk sound velocity calculated from the ideal fluid model. The second release system was identified by a change in slope of the release wave profile. The peak velocity of this release system did correspond more closely to the hydrodynamic bulk sound velocity. These results imply elastic behavior of aluminum at high pressure. The shape of the release wave, however, cannot be fitted by a perfect elastic‐plastic model, thus pointing out the need of a more elaborate description.
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