| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 780117 | International Journal of Mechanical Sciences | 2014 | 7 Pages |
•The displacement vector fields are recorded using the speckle photography method.•The local strain pattern is defined by the work hardening law acting of flow stage.•The localization patterns are viewed as different types of autowave processes.•The dispersion relation has quadratic form and describes nonlinear processes.
The localization behavior of plastic flow was investigated for a range of pure metals and alloys. The localized plastic flow is regarded as an autowave process having a fixed set of features, i.e. propagation rate, wave number and dispersion law. Using the method of speckle photography, the autowave propagation rate has been determined experimentally for the stage of linear work hardening. Moreover, a dispersion relation of quadratic form and wave number dependencies of phase and group rates have been derived for localized plastic flow autowaves. A detailed quantitative comparison is made of the phase and group rates of the autowaves. This suggests that the two types of wave rates are closely related.
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