Thermomechanical Behavior of Steels in Tension Studied with Synchronized Full-Field Deformation and Temperature Measurements

Abstract Despite tensile testing being commonly used for investigating the mechanical behavior of materials, occurrence heterogeneous strain and increasing temperature at high rates make experiment much more complex. This work presents a method integrating synchronous full-field stereo Digital Image Correlation (DIC) Infrared Thermography (IRT). enabled resolution investigations development local temperatures strains specimen during loading four steels ranging from 2.5·10 −4 to 900 s −1 . The tests were monitored by setup optical cameras an infrared camera. Data acquisition was synchronized, pinhole camera model translate images all same three-dimensional space. displacement vector fields DIC subtracted IRT represent maps in Lagrangian coordinate system. overall thermomechanical response materials shown as 3D waterfall plots, which localized function position engineering strain. results show that increased homogeneously uniform deformation higher (10 −2 -900 ) markedly with onset necking on region At these rates, increase observed global position, evidencing spatial temporal synchronization. described accurately investigate evolution both low rate regime.