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Microstructural insights into EUROFER97 batch 3 steels

Duerrschnabel, Michael ORCID iD icon 1; Jäntsch, Ute 1; Gaisin, Ramil ORCID iD icon 1; Rieth, Michael ORCID iD icon 1
1 Institut für Angewandte Materialien – Angewandte Werkstoffphysik (IAM-AWP), Karlsruher Institut für Technologie (KIT)

Abstract:

Extensive analytical electron microscopical analyses were carried out from the micrometer scale down to the nanometer scale to characterize three variants of the 9% reduced activation ferritic martensitic (RAFM) steel EUROFER97/3. No huge microstructural differences were observed between the three grades. Electron backscatter diffraction (EBSD) in a scanning electron microscope (SEM) was used to determine prior austenite grain (PAG) and lath sizes of the martensite matrix. The PAG size varied between 4.5 µm and 6.5 µm depending on the reconstruction algorithm. Furthermore, the martensitic lath sizes determined by SEM-EBSD are only half or 1/3 of that determined manually from transmission electron microscopy (TEM) images, which might be related to the limited statistics in this type of TEM data evaluations. The SEM-EDX shows that M$_{23}$C$_6$-type phases are preferentially located on lath and grain boundaries due to preferential diffusion of elements like Cr, W, and C to and along grain boundaries, which agrees with TEM-EDX measurements. TEM techniques like STEM-EDX and high-resolution TEM were used to describe the occurring precipitates i.e., M$_{23}$C$_6$, VN, TaC morphologically, structurally, and chemically. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000160135
Veröffentlicht am 04.07.2023
Originalveröffentlichung
DOI: 10.1016/j.nme.2023.101445
Scopus
Zitationen: 7
Web of Science
Zitationen: 5
Dimensions
Zitationen: 7
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Angewandte Werkstoffphysik (IAM-AWP)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 06.2023
Sprache Englisch
Identifikator ISSN: 2352-1791
KITopen-ID: 1000160135
HGF-Programm 31.13.05 (POF IV, LK 01) Neutron-Resistant Structural Materials
Erschienen in Nuclear Materials and Energy
Verlag Elsevier
Band 35
Seiten Art.-Nr.: 101445
Vorab online veröffentlicht am 16.05.2023
Schlagwörter EUROFER97/3, Analytical electron microscopy, ThermoCalc simulation
Nachgewiesen in Dimensions
Web of Science
Scopus
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