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Abstract:

New steady state creep data of Inconel 738 lc at 1023, 1073 and 1123 K at stresses between 250 and 580 MPa are reported. At each temperature analyzed, two regions of different slope in the log σ vs log ε̇ diagram were obtained related to different deformation mechanisms. The data were interpreted in terms of the Dorn's relationship and the Brown and Ashby's approach. Apparent activation energy were also measured and analyzed considering the variation with temperature of all the parameters of the Dorn's equation. This kind of approach could explain the high values of apparent activation energies obtained in precipitation hardened alloys.

Registro:

Documento: Artículo
Título:Constant stress creep and apparent activation energy analysis of a Ni-base superalloy between 1023 and 1123 K
Autor:Marzocca, A.J.; Picasso, A.C.
Filiación:Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón 1, Buenos Aires (1428), Argentina
Universidad Nacional del Centro de la Provincia de Buenos Aires, Facultad de Ciencias Exactas, IFIMAT, Pinto 399, Tandil, Prov. de Buenos Aires (7000), Argentina
Palabras clave:Apparent activation energy; Brown and Ashby's relationship; Inconel 738 lc; Precipitation hardened alloy; Steady state creep; Creep; Creep testing; Mechanical testing; Precipitation hardened alloy; Superalloys
Año:1996
Volumen:37
Número:11
Página de inicio:1684
Página de fin:1689
DOI: http://dx.doi.org/10.2320/matertrans1989.37.1684
Título revista:Materials Transactions, JIM
Título revista abreviado:Mater Trans JIM
ISSN:09161821
CODEN:MTJIE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09161821_v37_n11_p1684_Marzocca

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Citas:

---------- APA ----------
Marzocca, A.J. & Picasso, A.C. (1996) . Constant stress creep and apparent activation energy analysis of a Ni-base superalloy between 1023 and 1123 K. Materials Transactions, JIM, 37(11), 1684-1689.
http://dx.doi.org/10.2320/matertrans1989.37.1684
---------- CHICAGO ----------
Marzocca, A.J., Picasso, A.C. "Constant stress creep and apparent activation energy analysis of a Ni-base superalloy between 1023 and 1123 K" . Materials Transactions, JIM 37, no. 11 (1996) : 1684-1689.
http://dx.doi.org/10.2320/matertrans1989.37.1684
---------- MLA ----------
Marzocca, A.J., Picasso, A.C. "Constant stress creep and apparent activation energy analysis of a Ni-base superalloy between 1023 and 1123 K" . Materials Transactions, JIM, vol. 37, no. 11, 1996, pp. 1684-1689.
http://dx.doi.org/10.2320/matertrans1989.37.1684
---------- VANCOUVER ----------
Marzocca, A.J., Picasso, A.C. Constant stress creep and apparent activation energy analysis of a Ni-base superalloy between 1023 and 1123 K. Mater Trans JIM. 1996;37(11):1684-1689.
http://dx.doi.org/10.2320/matertrans1989.37.1684