In-situ analysis of the thermoelastic effect and its relation to the onset of yielding of low carbon steel

The thermoelastic effect indicates the dependency of temperature and volume change in material and, due to heat released during plastic deformation, a minimum occurs region onset yielding. An experimental setup is presented for microscopic analysis effect, which allows high precision measurements specimen. In-situ diffraction experiments were performed single phase low carbon steel HC260Y using synchrotron at High Energy Material Science beamline P07 Petra III, DESY. This direct comparison yielding by observing evolution lattice strains dislocations densities with specimen continuous cyclic test having measuring frequency accuracy. Therefore, are evaluated based on peak shift several planes dislocation density estimated micro strain broadening. results prove existing assumptions about relation between clearly qualify temperature-based determination method characterization microstructural basis. usefulness elasticity parameters shown exemplarily loading moduli compared methods.