A ductile fracture criterion under warm-working conditions based on the multiscale model combining molecular dynamics with finite element methods

•Micro-void-nucleation is promoted by elevated temperature.•A multiscale ductile fracture criterion considering the Lode parameter, stress triaxiality, and temperature is developed by molecular dynamics and representative volume element.•The average absolute error of the New criterion is smaller than the Lou criterion, the B&W criterion and the Shang criterion.•The fracture loci of additive manufacturing AlSi10Mg in warm-working conditions are constructed by the New criterion.