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Microstructure characterization of two Z-phase strengthened 12%chromium steels

Masoud Rashidi (Institutionen för teknisk fysik, Materialens mikrostruktur ) ; Fang Liu (Institutionen för teknisk fysik, Materialens mikrostruktur ) ; Hans-Olof Andrén (Institutionen för teknisk fysik, Materialens mikrostruktur )
10th Liège Conference on Materials for Advanced Power Engineering. September 14th - 17th, 2014. (2014)
[Konferensbidrag, refereegranskat]

The microstructure of two Z-phase strengthened steels was characterized in different heat treatment conditions, as-tempered and after 1000 hours ageing at 650°C. A high Cr content together with Ta and N additions were used to stimulate the formation of a fine distribution of Z-phase as strengthening particles in both alloys. Atom probe tomography, transmission electron microscopy, and scanning electron microscopy were employed for a detailed characterization of the microstructure. The A1 steel contained very little carbon, which resulted in a fast transformation from MX to Z-phase. In the A2 steel that contained a higher carbon content and an addition of Cu, the MX to Z-phase transformation was slower. The Cu addition to the A2 steel improved Laves-phase distribution and morphology.



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Denna post skapades 2015-06-02.
CPL Pubid: 217934

 

Institutioner (Chalmers)

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

Ämnesområden

Energi
Materialvetenskap
Hållbar utveckling
Innovation och entreprenörskap (nyttiggörande)
Metallurgi och metalliska material
Metallurgisk processteknik

Chalmers infrastruktur

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Development of a new generation of 12% Cr steels: Z-phase strengthened steels