Interrelation between local strain jumps and temperature bursts due to the jerky flow in metals under the complicate loading conditions: experimental study by using the DIC-technique and the IR-analysis

The present work focused on the complex study of the influence of the stress concentrators, the loading system stiffness, and the additional cyclic impact on the behavior patterns of the Al-Mg alloy and the carbon steel during uniaxial tension tests with the use of the original samples with complicated geometry. The aim of the investigation was the complex study of the temporal instabilities and spatial localization due to the Lüder’s behavior, the Portevin–Le Chatelier effect and the shoulder or necking effect with the use of the non-contact 3-D Digital Image Correlation measurement system Vic-3D (Correlated Solutions) and the infrared system FLIR SC7700. This study contains a brief description of the test procedure and the experimental results of providing mechanical tests on the flat dog-bone specimens and the specimens with stress concentrators, with the additional deformable parts and the complicated samples with two L-shaped holes