Abstract
The plastic strain localization in metals takes place, as a rule, at large strains and therefore it can be considered as an important indicator of failure. Detection of plastic strain localization allows us to improve technical diagnostics. However, there is no consensus on the leading mechanism of such localization. There are two approaches: a dislocation model and a model of the dynamic instability of plastic deformation associated with the descending branch of the stress-strain curve. Both models do not allow us to predict the parameters of the plastic strain localization bands, since they use characteristics that are difficult to determine experimentally (for example the density of dislocations et al.).The method of acoustic anisotropy is used as an experimental method for the precise determination of plastic strain localization zones. As the main mechanism of localization, it is proposed to consider the probability distribution of the characteristics of individual grains in polycrystalline material.The experimental results are described in the article and a new three-dimensional model of the localization effect of plastic deformations is given, which is an important indicator of the material failure.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.