In-situ analysis of the elastic-plastic characteristics of high strength dual-phase steel

Modeling the elastic behavior of dual-phase steels is complex due to strain dependency Young's modulus and high nonlinearity. Since it assumed that reasons for this are be found in microstructural behavior, microscopic in-situ analysis necessary, but overlap martensite ferrite peaks, evaluation diffraction profiles highly complex. Within work, CR590Y980T (DP1000) investigated a continuous cyclic tensile tension-compression test under synchrotron radiation at High Energy Material Science beamline P07 Petra III, DESY. On basis additional EBSD measurements, an approach shown analyze such way can separated three lattice planes. The origin specific elastic-plastic terms onset yielding, anelasticity or early re-yielding analyzed on strains interphase stresses. For this, time-synchronously measured micro data correlated with macro stress-strain relationship thermoelastic effect. results help better understand strain-dependent DP level provide great potential improve characterization modeling springback prediction.