Effect of prior deformation on the subsequent creep and anelastic recovery behaviour of an advanced martensitic steel: unified constitutive modelling

•A constitutive viscoplastic model is developed for describing the high-temperature deformation behaviour of an advanced martensitic steel.•The model is a variant of the Chaboche model which considers back-stress and drag-stress concepts for representing kinematic and isotropic hardening responses, respectively.•Armstrong-Fredrick type equations, considering the three mechanisms of strain hardening, dynamic softening and static-recovery, are employed for defining the evolutions of the backstress and drag-stress.•The model is able to represent constant-load creep, constant-strain stress relaxation, anelastic recovery and negative creep phenomena.•The model takes into account the effect of prior-loading on the subsequent deformation behaviour of the steel.