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Vodopivec, Franc; Breskvar, Bojan; Vojvodic-Tuma, Jelena; Spaic, Savo; Markoli, Bostjan
Materials and Technology, 09/2005, Letnik: 39, Številka: 5Journal Article
Based on experimental data and transmission electron micrographs an explanation of the mechanism of the change of Charpy notch transition temperature after strain ageing is proposed. The explanation involves the interplane ordering of carbon atoms at ageing annealing at 250 deg C as a synergy of the dislocation structure and the redistribution of carbon atoms in solid solution in ferrite. The induced internal stresses decrease the cleavage fracture strength of the ferrite matrix and increase the Charpy notch toughness transition temperature.
