Title

Characterization Of The Creep Deformation And Rupture Behavior Of Ds Gtd-111 Using The Kachanov-Rabotnov Constitutive Model

Keywords

constitutive modeling; creep; creep damage; directionally solidified; DS GTD-111; life prediction; material modeling; temperature dependence; tertiary

Abstract

Creep deformation and rupture experiments are conducted on samples of the Ni-base superalloy directionally solidified GTD-111 tested at temperatures between 649°C and 982°C and two orientations (longitudinally and transversely oriented). The secondary creep constants are analytically determined from creep deformation experiments. The classical Kachanov-Rabotnov model for tertiary creep damage is implemented in a general-purpose finite element analysis (FEA) software. The simulated annealing optimization routine is utilized in conjunction with the FEA implementation to determine the creep damage constants. A comparison of FEA and creep deformation data demonstrates high accuracy. Using regression analysis, the creep constants are characterized for temperature dependence. A rupture prediction model derived from creep damage evolution is compared with rupture experiments. © 2011 American Society of Mechanical Engineers.

Publication Date

4-5-2011

Publication Title

Journal of Engineering Materials and Technology, Transactions of the ASME

Volume

133

Issue

2

Number of Pages

-

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1115/1.4003111

Socpus ID

79953245002 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/79953245002

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