title: Characterization of Laves phase in Crofer 22 H stainless steel.
abstract: This study investigated the effect of annealing temperature on the precipitation behavior of Crofer(®) 22 H at 600°C, 700°C, and 800°C. The grain size distribution, precipitate phase identification, and microstructure were analyzed using electron backscatter diffraction (EBSD) and energy dispersive X-ray spectroscopy (EDS). The morphology of Laves phase (Fe,Cr,Si)(2)(Nb,W) precipitates having the Cr(2)Nb structure changed from strip-like to needle-shaped as the annealing temperature was increased. The precipitates of the Laves phase also shifted from the grain boundaries to the grain interiors when the temperature was increased. However, the average grain size (150 μm) of the ferritic matrix did not significantly change at 600°C, 700°C, and 800°C for 10 h.
authors.affiliation: Department of Materials Science and Engineering, National Cheng-Kung University, Tainan 701, Taiwan.
authors.forename: Zheng-Wen
authors.initials: ZW
authors.lastname: Hsiao
authors.affiliation: Forschungszentrum Juelich GmbH, Institute for Energy and Climate Research (IEK), Microstructure and Properties of Materials (IEK-2), 52425 Juelich, Germany.
authors.forename: Bernd
authors.initials: B
authors.lastname: Kuhn
authors.affiliation: Research Center for Physical Properties and Microstructure of Metals, National Sun Yat-Sen University, Kaohsiung 804, Taiwan.
authors.forename: Delphic
authors.initials: D
authors.lastname: Chen
authors.affiliation: Forschungszentrum Juelich GmbH, Institute for Energy and Climate Research (IEK), Microstructure and Properties of Materials (IEK-2), 52425 Juelich, Germany.
authors.forename: Lorenz
authors.initials: L
authors.lastname: Singheiser
authors.affiliation: Department of Materials Science and Engineering, National Cheng-Kung University, Tainan 701, Taiwan. Electronic address: jckuo@mail.ncku.edu.tw.
authors.forename: Jui-Chao
authors.initials: JC
authors.lastname: Kuo
authors.affiliation: Department of Chemical and Materials Engineering, National University of Kaohsiung, Kaohsiung City 811, Taiwan.
authors.forename: Dong-Yih
authors.initials: DY
authors.lastname: Lin
keywords: Crofer 22 H; EBSD; Laves phase; Phase characterization