Creep and mechanical behavior study of Inconel 718 Superalloy
Tipo
Artigo
Data de publicação
2022
Periódico
Materials Research
Citações (Scopus)
3
Autores
Sugahara T.
Couto A.A.
Barboza M.J.R.
Neto F.P.
Takahashi R.J.
Reis D.A.P.
Couto A.A.
Barboza M.J.R.
Neto F.P.
Takahashi R.J.
Reis D.A.P.
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Resumo
© 2022 Universidade Federal de Sao Carlos. All rights reserved.Over the years, the demand for high engine efficiency has resulted in the development of new generation superalloys with improved elevated temperature properties, especially creep resistance. This study aimed to evaluate creep and mechanical behavior of Inconel 718 superalloy. Creep tests were performed at temperature range of 650 to 700 °C and stress range of 625 to 814 MPa. Hot tensile and oxidation tests were performed and the characterization techniques used in this study were scanning electron microscopy (SEM) for microstructural and fracture surface analysis, transmission electron microscopy (TEM) for precipitates analysis; grazing X-ray diffraction for analysis of oxide formation and Vickers microhardness. The analyze of stress exponent value (n = 36.48) and activation energy (Qc = 512.97 kJ/mol), suggested that creep mechanism at 650 °C was the climb dislocation mechanism. The Inconel 718 presented ductile fracture at 650 and 700 °C and intergranular fracture to 675 °C.
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Assuntos Scopus
Behavior studies , Creep behaviors , Elevated temperature , Engine efficiency , Inconel 718 superalloys , Inconel-718 , Materials characterization , Mechanical behavior , Temperature properties , Temperature range