TY  - JOUR
AU  - Pöpperlová, Jana
AU  - Fan, Xiuru
AU  - Kuhn, Bernd
AU  - Krupp, Ulrich
TI  - Up-Scaling of Thermomechanically Induced Laves Phase Precipitation in High Performance Ferritic (HiperFer) Stainless Steels
JO  - Materials
VL  - 14
IS  - 7
SN  - 1996-1944
CY  - Basel
PB  - MDPI
M1  - FZJ-2021-01715
SP  - 1635 -
PY  - 2021
AB  - Fully ferritic stainless steels, strengthened by Laves phase precipitates, were developed for high-temperature application in the next generation of ultra-super-critical thermal power plants. Based on the rapid occurrence of thermomechanically induced precipitation in strengthening Laves phase particles, a novel thermomechanical process route for this class of steels was developed. A controlled precipitation of particles, in a desired morphology and quantity, and an optimization of the corresponding forging parameters was achieved on a laboratory scale. This article outlines the very first up-scaling experiment with these optimized forging parameters from the laboratory scale to the industrial scale. The precipitation behavior was analyzed, utilizing digital particle analysis of scanning electron microscopy (SEM) images, to estimate and compare the phase fraction of the precipitated Laves phase, as well as the particle size and distribution. Due to the up-scaling in the forging process, the behavior of the precipitation changed and the precipitation strengthening effect was decreased, in comparison with the laboratory scale.
LB  - PUB:(DE-HGF)16
C6  - 33810595
UR  - <Go to ISI:>//WOS:000638697800001
DO  - DOI:10.3390/ma14071635
UR  - https://juser.fz-juelich.de/record/891755
ER  -