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Initial study on Z-phase strengthened 9-12% Cr steels by atom probe tomography

Fang Liu (Institutionen för teknisk fysik, Mikroskopi och mikroanalys) ; Hans-Olof Andrén (Institutionen för teknisk fysik, Mikroskopi och mikroanalys)
9th Liège Conference on materials for anvanced power engineering paper 012, p. 107-116. (2010)
[Konferensbidrag, refereegranskat]

The microstructure of two different types of Z-phase strengthened experimental steels, CrNbN-based or CrTaN-based, was investigated. Both steels underwent aging at 650°C for relatively short period of time, 24 hours or 1005 hours. Atom probe tomography was used to study the chemical composition of the matrix and precipitates, and the size and number density of the small precipitates. Both steels contain Laves phase at prior austenite grain boundaries and martensitic lath boundaries. The CrTaN-based steel was found more promising due to its finer and more densely distributed precipitates after 1005 hour aging.

Nyckelord: 9-12% Cr steels, Z-phase strengthening, microstructure, atom probe tomography



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Denna post skapades 2010-12-22. Senast ändrad 2015-03-30.
CPL Pubid: 131748

 

Institutioner (Chalmers)

Institutionen för teknisk fysik, Mikroskopi och mikroanalys (2005-2012)

Ämnesområden

Energi
Materialvetenskap
Hållbar utveckling
Övrig teknisk materialvetenskap

Chalmers infrastruktur