TY - JOUR
T1 - ODS steel raw material local structure analysis using X-ray absorption spectroscopy
AU - Cintins, A.
AU - Anspoks, A.
AU - Purans, J.
AU - Kuzmin, A.
AU - Timoshenko, J.
AU - Vladimirov, P.
AU - Gräning, T.
AU - Hoffmann, J.
N1 - Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2015
Y1 - 2015
N2 - Oxide dispersion strengthened (ODS) steels are promising materials for fusion power reactors, concentrated solar power plants, jet engines, chemical reactors as well as for hydrogen production from thermolysis of water. In this study we used X-ray absorption spectroscopy at the Fe and Cr K-edges as a tool to get insight into the local structure of ferritic and austenitic ODS steels around Fe and Cr atoms and its transformation during mechanical alloying process. Using the analysis of X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) we found that for austenitic samples a transformation of ferritic steel to austenitic steel is detectable after 10 hours of milling and proceeds till 40 hours of milling; only small amount of a-phase remains after 80 hours of milling. We found that the Cr K-edge EXAFS can be used to observe distortions inside the material and to get an impression on the formation of chromium clusters. In-situ EXAFS experiments offer a reliable method to investigate the ferritic to austenitic transformation.
AB - Oxide dispersion strengthened (ODS) steels are promising materials for fusion power reactors, concentrated solar power plants, jet engines, chemical reactors as well as for hydrogen production from thermolysis of water. In this study we used X-ray absorption spectroscopy at the Fe and Cr K-edges as a tool to get insight into the local structure of ferritic and austenitic ODS steels around Fe and Cr atoms and its transformation during mechanical alloying process. Using the analysis of X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) we found that for austenitic samples a transformation of ferritic steel to austenitic steel is detectable after 10 hours of milling and proceeds till 40 hours of milling; only small amount of a-phase remains after 80 hours of milling. We found that the Cr K-edge EXAFS can be used to observe distortions inside the material and to get an impression on the formation of chromium clusters. In-situ EXAFS experiments offer a reliable method to investigate the ferritic to austenitic transformation.
UR - http://www.scopus.com/inward/record.url?scp=84924705832&partnerID=8YFLogxK
U2 - 10.1088/1757-899X/77/1/012029
DO - 10.1088/1757-899X/77/1/012029
M3 - Conference article
AN - SCOPUS:84924705832
SN - 1757-8981
VL - 77
JO - IOP Conference Series: Materials Science and Engineering
JF - IOP Conference Series: Materials Science and Engineering
IS - 1
M1 - 012029
T2 - 12th Russia/CIS/Baltic/Japan Symposium on Ferroelectricity, RCBJSF 2014 and 9th International Conference on Functional Materials and Nanotechnologies, FM and NT 2014
Y2 - 29 September 2014 through 2 October 2014
ER -