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Neutron and synchrotron probes in the development of Co-Re-based alloys for next generation gas turbines with an emphasis on the influence of boron additives
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SYSNO ASEP 0433450 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Neutron and synchrotron probes in the development of Co-Re-based alloys for next generation gas turbines with an emphasis on the influence of boron additives Author(s) Mukherji, D. (DE)
Gilles, R. (DE)
Karge, L. (DE)
Strunz, Pavel (UJF-V) RID, ORCID, SAI
Beran, Přemysl (UJF-V) RID, ORCID, SAI
Eckerlebe, H. (DE)
Stark, A. (DE)
Szentmiklosi, L. (HU)
Macsik, Z. (HU)
Schumacher, G. (DE)
Zizak, I. (DE)
Hofmann, M. (DE)
Hoelzel, M. (DE)
Rösler, J. (DE)Number of authors 14 Source Title Journal of Applied Crystallography. - : Wiley - ISSN 0021-8898
Roč. 47, č. 4 (2014), s. 1417-1430Number of pages 14 s. Publication form Print - P Language eng - English Country US - United States Keywords high-temperature alloys ; In-situ neutron ; FRM-II Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GB14-36566G GA ČR - Czech Science Foundation (CSF) Institutional support UJF-V - RVO:61389005 UT WOS 000340362000029 DOI 10.1107/S1600576714013624 Annotation Nickel-based superalloys are the materials of choice in the hot section of current gas turbines, but they are reaching temperature limits constrained by their melting temperature range. Co-Re alloy development was prompted by a search for new materials for future gas turbines, where the temperature of application will be considerably higher. Addition of the very high melting point refractory metal Re to Co can increase the melting range of Co alloys to much higher temperatures than the commercial Co alloys in use today. The alloy development strategy is first discussed very briefly. In this program, model ternary and quaternary compositions were studied in order to develop a basic understanding of the alloy system. In situ neutron and synchrotron measurements (small and wide angle) at high temperatures were extensively used for this purpose and some selected results from the in situ measurements are presented. In particular, the effect of boron doping in Co-Re-Cr alloys and the stability of the TaC precipitates at high temperatures were investigated. A fine dispersion of TaC precipitates strengthens some Co-Re alloys, and their stability at the application temperature is critical for the long-term creep properties. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2015
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