Tancret, F. & Bellini, M. (2008) Properties, processability and weldability of a novel affordable creep resistant nickel base superalloy. Mater. Sci. Technol. 24 479–487.
Added by: Richard Baschera (2016-08-29 14:28:59) Last edited by: Richard Baschera (2016-08-29 14:51:17)
|Type de référence: Article
Numéro d'identification (ISBN etc.): 0267-0836
Clé BibTeX: Tancret2008
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Mots-clés: atig, Cracking, design, fracture, Mechanical properties, power-plant applications, Recrystallisation, resilience, simulation, srx, weld, welding
Créateurs: Bellini, Tancret
Collection: Mater. Sci. Technol.
Consultations : 7/360
Indice de consultation : 2%
Indice de popularité : 0.5%
A recently designed heat resistant alloy for operation similar to 750 degrees C in power plant, named FT750(DC), of composition Ni-20Cr-5Fe-3.5W-2.3Al-2.1Ti-0.07C-0.4Si-0.005B ( wt-%), is fully characterised. Creep rupture and damage is investigated, as well as Charpy impact toughness. The alloy processability is also assessed: castability ( comparison between measured microsegregation and Scheil simulation), forgeability ( hot tensile ductility, strain hardening and recrystallisation behaviour), gamma' aging heat treatment ( gamma-prime precipitation kinetics) and weldability ( GTAW/ TIG). It is demonstrated that this material, made affordable by avoiding the use of expensive alloying elements, with a creep rupture life in excess of 100 000 h at 750 degrees C under 100 MPa, is easily castable, forgeable and weldable. It can therefore be favourably compared to concurrent alloys for fossil fuel or nuclear power plant applications ( like the coal fired ultra supercritical steam power plant, or the nuclear high temperature gas cooled reactor) currently under assessment, such as alloys 230, 617, 625, 740, HX, etc.