Publications in Scientific Journals:
M. Nöhrer, W. Mayer, S. Primig, S. Zamberger, E. Kozeschnik, H. Leitner:
"Influence of Deformation on the Precipitation Behavior of Nb(CN) in Austenite and Ferrite";
Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science,
The evolution of Nb precipitates in a low-alloyed steel at 973 K (700 A degrees C) as a function of strain and subsequent dwell time is studied via atom-probe tomography (APT) and transmission electron microscopy. The results show that the volume fraction of the precipitates increases with increasing accumulated deformation because deformation-induced dislocations act as nucleation sites. The chemistry of these precipitates which are Nb carbonitrides changes with the dwell time after the deformation step. With increasing time, the C fraction increases. The precipitation analysis by APT in the austenite and the ferrite reveals that precipitates in the ferrite are larger and exhibit a higher C fraction compared to the precipitates in the austenite after the same thermo-mechanical treatment. The investigations also show that the volume fraction of Nb carbonitrides in the ferrite is higher than in the austenite.
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
Created from the Publication Database of the Vienna University of Technology.