Observations of copper clustering in a 25Cr-7Ni super duplex stainless steel during low-temperature aging under load
Journal article, 2012
Atom-probe tomography was used to investigate phase separation and copper (Cu) clustering in the ferrite phase of a 25Cr-7Ni super duplex stainless steel. The steel was subjected to a tensile load during aging at 325 degrees C for 5800 h. The degree of phase separation into alpha (Fe-rich) and alpha' (Cr-rich) was small, but still, it was the highest in the steel subjected to the highest load. Cu was found to cluster, and the number density of clusters increased with increasing load. In the material subjected to the highest load, Cu was enriched in regions that were neither Fe-rich nor Cr-rich. These regions also had the highest number density of Cu clusters.
alloys
precipitation
duplex
nucleation
clusters
copper
steels
growth
field
stainless steels
phase decomposition
atom-probe
3DAP
electron-microscopy
decomposition
Author
Mattias Thuvander
Chalmers, Applied Physics, Microscopy and Microanalysis
Chalmers, Applied Physics, Materials Microstructure
J. Zhou
Royal Institute of Technology (KTH)
J. Odqvist
Royal Institute of Technology (KTH)
Sandvik
S. Hertzman
Outokumpu Stainless Research Foundation
Royal Institute of Technology (KTH)
P. Hedstrom
Royal Institute of Technology (KTH)
Philosophical Magazine Letters
0950-0839 (ISSN) 1362-3036 (eISSN)
Vol. 92 7 336-343Subject Categories
Physical Sciences
DOI
10.1080/09500839.2012.672773