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.
clusters
field
growth
duplex
electron-microscopy
3DAP
steels
copper
precipitation
phase decomposition
alloys
atom-probe
decomposition
stainless steels
nucleation
Author
Mattias Thuvander
Chalmers, Applied Physics, Materials Microstructure
Chalmers, Applied Physics, Microscopy and Microanalysis
J. Zhou
The Royal Institute of Technology (KTH)
J. Odqvist
The Royal Institute of Technology (KTH)
Sandvik Materials Technology
S. Hertzman
The Royal Institute of Technology (KTH)
Outokumpu Stainless Research Foundation
P. Hedstrom
The Royal Institute of Technology (KTH)
Philosophical Magazine Letters
0950-0839 (ISSN) 1362-3036 (eISSN)
Vol. 92 7 336-343Subject Categories (SSIF 2011)
Physical Sciences
DOI
10.1080/09500839.2012.672773