Number of the records: 1
Fracture Resistance of 14Cr ODS Steel Exposed to a High Temperature Gas
- 1.
SYSNO ASEP 0506817 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Fracture Resistance of 14Cr ODS Steel Exposed to a High Temperature Gas Author(s) Hojná, A. (CZ)
Michalička, J. (CZ)
Hadraba, Hynek (UFM-A) RID, ORCID
Di Gabriele, F. (CZ)
Duchon, J. (CZ)
Rozumová, L. (CZ)
Husák, Roman (UFM-A)Number of authors 7 Article number 560 Source Title Metals. - : MDPI
Roč. 7, č. 12 (2017)Number of pages 17 s. Language eng - English Country CH - Switzerland Keywords ferritic alloys ; behavior ; microstructure ; mechanisms ; stability ; cr ; nanostructured steel ; thermal aging ; impact fracture ; microanalysis ; oxidation Subject RIV JG - Metallurgy OECD category Materials engineering R&D Projects GA14-25246S GA ČR - Czech Science Foundation (CSF) LQ1601 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UFM-A - RVO:68081723 UT WOS 000419184500045 EID SCOPUS 85038128447 DOI 10.3390/met7120560 Annotation This paper studies the impact fracture behavior of the 14%Cr Oxide Dispersion Strengthened (ODS) steel (ODM401) after high temperature exposures in helium and air in comparison to the as-received state. A steel bar was produced by mechanical alloying and hot-extrusion at 1150 degrees C. Further, it was cut into small specimens, which were consequently exposed to air or 99.9% helium in a furnace at 720 degrees C for 500 h. Impact energy transition curves are shifted towards higher temperatures after the gas exposures. The transition temperatures of the exposed states significantly increase in comparison to the as-received steel by about 40 degrees C in He and 60 degrees C in the air. Differences are discussed in terms of microstructure, surface and subsurface Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) observations. The embrittlement was explained as temperature and environmental effects resulting in a decrease of dislocation level, slight change of the particle composition and interface/grain boundary segregations, which consequently affected the nucleation of voids leading to the ductile fracture. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2020 Electronic address https://www.mdpi.com/2075-4701/7/12/560/htm
Number of the records: 1