Artur Błachowski1, Krzysztof Ruebenbauer1, Jerzy Jura2, Jan T. Bonarski3, Thierry Baudin4, Richard Penelle4
1Mössbauer Spectroscopy Division, Institute of Physics, Pedagogical University, 2 Podchorążych Str., 30-084 Kraków, Poland,
2Institute of Technology, Pedagogical University, 2 Podchorążych Str., 30-084 Krakow, Poland, and Institute of Metallurgy and Materials Science, Polish Academy of Sciences, 25 Reymonta Str., 30-059 Kraków, Poland,
3Institute of Metallurgy and Materials Science, Polish Academy of Sciences, 25 Reymonta Str., 30-059 Kraków, Poland,
4Laboratoire de Physico-Chimie de l’Etat Solide UMR CNRS 8648
Université de Paris Sud, Bâtiment 410, F-91405 Orsay CEDEX, France
Samples of cold rolled UR45N austenitic-ferritic duplex steel with cold rolling reduction ranging from 0% to 80% were investigated in the form of foils and powders by means of Mössbauer transmission spectroscopy. It was found that cold rolling has a minor effect on the martensitic transformation even at high reductions in the material under investigation. On the other hand, powdering process induces strong martensitic phase transformation, i.e., about 25% of austenite transforms into martensite during powdering. High rolling reductions as well as powdering reduce an average hyperfine magnetic field at iron by about 1 T, while annealing at about 430°C increases this field by about 3 T.