A new 12% chromium steel strengthened by Z-phase precipitates. (1st March 2016)

• Record Type: Journal Article
• Authors: Liu, Fang; Rashidi, Masoud; Johansson, Lennart; Hald, John; Andrén, Hans-Olof
• Is Part Of: Scripta materialia. Volume 113(2016)
• Page Start: 93
• Page End: 96
• Publication Date: 2016-03-01
• Subjects: Martensitic steels -- Creep -- Three-dimensional atom probe -- Transmission electron microscopy; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.10.030
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: 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) precipitates 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. Graphical abstract: