Journal Article

FZJ-2023-01971

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Heat Treatment of High-Performance Ferritic (HiperFer) Steels

Kuhn, B. (Corresponding author)FZJ* ; Talik, M.

2023
MDPI Basel

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Please use a persistent id in citations: doi:10.3390/ma16093500  doi:10.34734/FZJ-2023-01971

Abstract: High-performance Ferritic (HiperFer) steels are a novel class of heat-resistant, fully ferritic, Laves phase precipitation hardened materials. In comparison to conventional creep strength-enhanced 9–12 wt.% Cr ferritic–martensitic steels, HiperFer features increased mechanical strength, based on a thermodynamically stable distribution of small (Fe,Cr,Si)2(Nb,W) Laves phase precipitates, and—owing to its increased chromium content of 17 wt.%—improved resistance to steam oxidation, resulting in superior temperature capability up to 650 °C. Previous publications focused on alloying, thermomechanical processing, and basic mechanical property evaluation. The current paper concentrates on the effect of heat treatment on microstructural features, especially Laves phase population, and the resulting creep performance. At 650 °C and a creep stress of 100 MPa, an increase in rupture time of about 100% was achieved in comparison to the solely thermomechanically processed state.

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Contributing Institute(s):

1. Werkstoffstruktur und -eigenschaften (IEK-2)

Research Program(s):

1. 1243 - Thermal Energy Storage (POF4-124) (POF4-124)
2. Hochtemperatur- und Energiematerialien (03EK3032) (03EK3032)

Appears in the scientific report 2024

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