The use of the ultrafast heating (UFH) heat treatment process attracted great attention in the last few years, following the requirements for CO2 emissions reduction. The effect of ultrafast heating (UFH) treatment on AISI 441 ferritic stainless steels is reported in this paper. Results show that a minimum temperature of 975 °C is required to achieve a fully recrystallized microstructure. The study highlights the effect of ultrarapid annealing on grain size evolution as a function of different adopted process parameters. The obtained microstructure is related to mechanical properties in terms of ultimate tensile stress and hardness. The tensile properties fit well with the measured average grain size, thus allowing to target the tensile properties.
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