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Direct atom probe tomography observations of concentration fluctuations in Fe-Cr solid solution

J. Zhou ; J. Odqvist ; J. Agren ; A. Ruban ; Mattias Thuvander (Institutionen för teknisk fysik, Materialens mikrostruktur ) ; W. Xiong ; G. B. Olson ; P. Hedstrom
Scripta Materialia (1359-6462). Vol. 98 (2015), p. 13-15.
[Artikel, refereegranskad vetenskaplig]

The local concentration of atoms in an Fe-46.5 at.% Cr alloy, solution treated at four different temperatures above the miscibility gap, has been investigated using atom probe tomography. It is experimentally found that Cr atoms cluster in the solid solution and that the clustering tendency decreases with increasing temperature above the miscibility gap. These findings are corroborated by Monte Carlo simulations of the atomic short-range order, which show that clustering markedly decrease with increasing temperature from 800 to 1200 degrees C.

Nyckelord: Clustering, Spinodal decomposition, Stainless steels, Atom probe tomography, Fe-Cr



Denna post skapades 2015-03-11.
CPL Pubid: 213638

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Materialens mikrostruktur (2012-2015)

Ämnesområden

Metallurgi och metalliska material

Chalmers infrastruktur