Experimental and numerical investigation of local stress and strain heterogeneities in a bainitic steel

A specific in-situ tensile device has been set up in an X-Ray diffractometer. Stress can be measured at low temperature during loading in the baintic steel and in the ferritic phase. A two-scale modeling has been proposed and evaluated on three levels, means stress in the baintic steel, stress in the ferritic phase and stress heterogeneities in the ferritic phase. Simulations are in general agreement with experiments