Abstract
This paper aims to further developing the idea that one of the mechanisms responsible for plastic strain localization in dynamically loaded materials occurs due to structural transitions in microdefect ensembles. For this purpose, dynamic load tests were conducted using the split Hopkinson pressure bar. During dynamic deformation, the characteristic strain localization stages were identified by studying the temperature fields measured in-situ with a high-speed infrared camera CEDIP Silver 450M. The temperature values recorded in a strain localization zone do not support already existing concepts that the mechanism of strain localization is caused by thermoplastic instability. Our structural analysis shows evidence of a correlated behavior of the ensemble of defect, which can be classified as a structural transition that leads to strain localization. The results of experimental and structural studies allow us to suggest that one of the mechanisms of plastic strain localization in the AMg6 alloy tested under specified loading rates is caused by jumpwise processes in the defect structure of the alloy.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call