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Application of In Situ Neutron and X-Ray Measurements at High Temperatures in the Development of Co-Re-Based Alloys for Gas Turbines
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SYSNO ASEP 0391541 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Application of In Situ Neutron and X-Ray Measurements at High Temperatures in the Development of Co-Re-Based Alloys for Gas Turbines Author(s) Mukherji, D. (DE)
Rösler, J. (DE)
Wehrs, J. (DE)
Strunz, Pavel (UJF-V) RID, ORCID, SAI
Beran, Přemysl (UJF-V) RID, ORCID, SAI
Gilles, R. (DE)
Hofmann, M. (DE)
Holzel, M. (DE)
Eckerlebe, H. (DE)
Szentmiklosi, L. (HU)
Macsik, Z. (HU)Number of authors 11 Source Title Metallurgical and Materials Transactions A. - : Springer - ISSN 1073-5623
44A, č. 1 (2013), s. 22-30Number of pages 9 s. Publication form Print - P Language eng - English Country US - United States Keywords Co base alloy ; neutron diffraction ; X-Ray diffraction Subject RIV BM - Solid Matter Physics ; Magnetism Institutional support UJF-V - RVO:61389005 UT WOS 000313718500006 DOI 10.1007/s11661-012-1363-6 Annotation Co-Re alloy development is prompted by the search for new materials for future gas turbines which can be used at temperatures considerably higher than the current day single crystal Ni-based superalloys. The Co-Re-based alloys have been designed to have very high melting range, and they are meant for application at + 373 K (+100 degrees C) above Ni-superalloys. They are significantly different from the conventional Co-based alloys that are used in static components of today's gas turbines, and the Co-Re alloys have never been used for structural applications before. The Co-Re-Cr system has complex microstructure with many different phases present. Phase transformations and stabilities of fine strengthening precipitates at high temperatures remain mostly unexplored in the Co-Re alloys, and to develop basic understanding, model ternary and quaternary compositions were studied within the alloy development program. In situ neutron and synchrotron measurements at high temperatures were extensively used for this purpose, and some recent results from the in situ measurements are presented. In particular, the effect of boron doping in Co-Re alloys and the stabilities of the fine TaC precipitates at high temperatures were investigated. A fine dispersion of TaC precipitates strengthens some Co-Re alloys, and their stabilities at the application temperatures are critical. In the beginning, the alloy development strategy is very briefly discussed. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2014 Electronic address http://link.springer.com/content/pdf/10.1007%2Fs11661-012-1363-6
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