A new 12% chromium steel strengthened by Z-phase precipitates
Artikel i vetenskaplig tidskrift, 2016

In order to increase the corrosion resistance and simultaneously maintain the creep resistance of 9–12% Cr steels at 650 °C, a new alloy design concept was proposed, using thermodynamically stable Z-phase (CrTaN) precipi- tates to strengthen the steel. A new trial Z-phase strengthened 12% Cr steel was produced and creep tested. The steel exhibited good long-term creep resistance. Dense nano-sized Z-phase precipitates were formed at an early stage, and coarsened slowly. They remained small after more than 10,000 h.

Transmission electron microscopy

Martensitic steels

Three-dimensional atom probe

Creep

Författare

Fang Liu

Chalmers, Fysik, Biologisk fysik

Masoud Rashidi

Chalmers, Fysik, Biologisk fysik

Lars-Gunnar Johansson

Siemens industrial turbomachinery

John Hald

Danmarks Tekniske Universitet (DTU)

Hans-Olof Andrén

Chalmers, Fysik, Biologisk fysik

Scripta Materialia

1359-6462 (ISSN)

Vol. 113 93-96

Drivkrafter

Hållbar utveckling

Styrkeområden

Energi

Materialvetenskap

Ämneskategorier

Annan materialteknik

Metallurgi och metalliska material

Den kondenserade materiens fysik

DOI

10.1016/j.scriptamat.2015.10.030