SciELO journals
Browse
1/1
20 files

Study of the aging and rejuvenation heat treatment of superalloy GTD111

dataset
posted on 2019-09-18, 03:58 authored by André Lucas Merini, Carlos Augusto Silva Oliveira

ABSTRACT The nickel-based superalloy GTD111 is commonly used in the manufacture of gas turbines blades, for applications in power generation and aeronautics. The present study investigates this superalloys’s behavior “as provided” from the manufacturer and previously heat treated for γ’ size reduction and morphology changing from spheroidal to cuboid. The samples were aged in laboratory and then submitted to the rejuvenation heat treatment with the objective of recovering the degraded microstructure. For each condition, microhardness, γ’ size and percentage were evaluated using scanning electron microscopy. For the aging stage a study of γ’ coarsening rate measured from experimental results and the calculated rate from γ’ coarsening theory is presented. Two equations that describe the γ’ coarsening kinetics of this study are presented and compared with equations from others authors that studied the same superalloy. The results showed that samples previously heat treated (rejuvenated) have lower coarsening rate when compared to the initial state provided from the blade casting process.

History

Usage metrics

    Matéria (Rio de Janeiro)

    Licence

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC