A new 12% chromium steel strengthened by Z-phase precipitates
Journal article, 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.

Martensitic steels

Creep

Three-dimensional atom probe

Transmission electron microscopy

Author

Fang Liu

Chalmers, Physics, Materials Microstructure

Masoud Rashidi

Chalmers, Physics, Materials Microstructure

Lennart Johansson

Siemens industrial turbomachinery

John Hald

Technical University of Denmark (DTU)

Hans-Olof Andrén

Chalmers, Physics, Materials Microstructure

Scripta Materialia

1359-6462 (ISSN)

Vol. 113 93-96

Driving Forces

Sustainable development

Areas of Advance

Energy

Materials Science

Subject Categories

Other Materials Engineering

Metallurgy and Metallic Materials

Condensed Matter Physics

DOI

10.1016/j.scriptamat.2015.10.030

More information

Latest update

10/16/2018