Thermomechanical Fatigue Behavior of a Directionally Solidified Ni-Base Superalloy

Autor:	Ali P. Gordon, David L. McDowell, Richard W. Neu, M. M. Shenoy
Rok vydání:	2005
Předmět:	Materials science Mechanical Engineering Constitutive equation Metallurgy Plasticity Condensed Matter Physics Durability Isothermal process Superalloy Transverse plane Creep Mechanics of Materials Crack initiation General Materials Science Composite material
Zdroj:	Journal of Engineering Materials and Technology. 127:325-336
ISSN:	1528-8889 0094-4289
DOI:	10.1115/1.1924560
Popis:	A continuum crystal plasticity model is used to simulate the material behavior of a directionally solidified Ni-base superalloy, DS GTD-111, in the longitudinal and transverse orientations. Isothermal uniaxial fatigue tests with hold times and creep tests are conducted at temperatures ranging from room temperature (RT) to 1038°C to characterize the deformation response. The constitutive model is implemented as a User MATerial subroutine (UMAT) in ABAQUS (2003, Hibbitt, Karlsson, and Sorensen, Inc., Providence, RI, v6.3) and a parameter estimation scheme is developed to obtain the material constants. Both in-phase and out-of-phase thermo-mechanical fatigue tests are conducted. A physically based model is developed for correlating crack initiation life based on the experimental life data and predictions are made using the crack initiation model.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3358b670ab06f3fc8f3ce3a65fe1b7c6 https://doi.org/10.1115/1.1924560 Zobrazit plný text záznamu