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Creep behaviour and microstructure changes of model cast Ni-Cr-W-C alloys
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SYSNO ASEP 0367575 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Creep behaviour and microstructure changes of model cast Ni-Cr-W-C alloys Author(s) Kvapilová, Marie (UFM-A) RID, ORCID
Kuchařová, Květa (UFM-A) RID, ORCID
Sklenička, Václav (UFM-A) RID, ORCID
Svoboda, Milan (UFM-A) RID, ORCID
Hrbáček, K. (CZ)Source Title Procedia Engineering. - Amsterdam : Elsevier BV
Roč. 10, - (2011), s. 839-844Number of pages 6 s. Action ICM11 -International Conference on The Mechanical Behavior of Materials /11./ Event date 05.06.2011-09.06.2011 VEvent location Lake Como Country IT - Italy Event type WRD Language eng - English Country NL - Netherlands Keywords cast Ni based superalloy ; creep properties ; phase stability Subject RIV JG - Metallurgy CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000300451300134 Annotation A comparative study of creep and microstructural properties of two model cast Ni-Cr-W-C alloys (Alloys A and B) resistant to high-temperature oxidation with different contents of Cr, W, Zr and Fe was performed. Uniaxial tensile creep tests were carried out at temperatures from 1023 to 1273 K and at the applied stresses ranged from 20 to 250 MPa. Creep tests were followed by microstructural and fractographic investigations. A mutual comparison between the creep characteristics of the alloys under comparable creep loading conditions shows that the alloy B with higher contents of tungsten and zirconium is more creep resistant as that of the Alloy A at lower temperatures. It is suggested that the alloy A and B earn their creep strength from the combination of solid solution hardening and precipitation hardening. However, it is difficult to quantify each contribution to the overall creep strength. Possible reason for the different consequence of strengthening effects is discussed. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2012
Number of the records: 1