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Short-range order of Cr and Mo in amorphous steels by EXAFS. Influence of structural changes in the ductility and mechanical properties of steels

Type of activity
Competitive project
Funding entity
European Synchrotron Radiation Facilities (ESRF)-Grenoble-Francia
Funding entity code
MA-656
Amount
43.200,00 €
Start date
2008-10-24
End date
2008-10-28
Abstract
The aim of the experiment was to obtain information about the local atomic environment of
Molybdenum, Chromium, and Iron atoms in melt-spun ribbons of amorphous steels of
Fe(71.2-x)C(7.0)B(3.3)P(5.5)Cr(2.3)Mo(x) with the Mo concentration varying between 0
and 6.5 at. %. These compositions were previously characterized by Mössbauer
spectroscopy in our lab and by x-ray diffraction at the beamline BM16 at ESRF and showed
different iron environments that correlated with changes in the glass forming ability reported
in the literature [1]. Therefore the main result searched for with this proposal was the
assessment of the local environments of Mo sites, in order to establish how the atomic
configuration changed upon doping and how these changes influence macroscopic properties
such as the critical size of amorphous casting and the domain distributions observed using
Mössbauer spectroscopy.

Participants