An analysis of the temperature and rate dependence of Charpy V-notch energies for a high nitrogen steel

摘要: The brittle-ductile transition for a high nitrogen steel is investigated by numerical analyses of the Charpy impact test. material described in terms an elastic-viscoplastic constitutive model that accounts nucleation and growth micro-voids, leading to ductile fracture, as well cleavage failure micro-crack nucleation. temperature dependence flow strength strain hardening included model, this leads prediction from fracture predominantly increases. For particular considered it found variation with has strong effect on mode transition. Both slow loading specimen are analyzed. Most computations based quasi-static formulation since, even at rates encountered test, rate sensitivity main time effect. influence inertia few transient analyses.