Irradiation in BCC materials: Defect-induced changes of the effective dislocation mobility and their relation with the dose-dependent fracture response

The mechanical response of nuclear structural materials and their lifetime are strongly affected by radiation effects. This influence is concern, especially in body centered cubic materials, which exhibiting a well-defined ductile to brittle transition. transition temperature itself dose-dependent may rise or above the room temperature. In current work, irradiation effect modeled predict changes effective dislocation mobility, represented Defect Induced Apparent Temperature shift (ΔDIAT). Mainly based crystal plasticity material model used rather than phenomenological approach. accounts for both thermally activated mobility an athermal regime materials. defect-induced evolution ΔDIAT turn analyzed relations with fracture highlighted discussed.