ISSN: 1546-962X
CODEN: JAIOAD
Published Online: 3 May 2011
Page Count: 17

Modeling Creep-Fatigue Deformation of Ni-Base Superalloys Using Crystal Viscoplasticity

Neu, R. W.
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of TechnologySchool of Materials Science and Engineering, Georgia Institute of Technology, AtlantaAtlanta, GAGA

Smith, D. J.
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA

(Received 3 December 2010; accepted 26 March 2011)

Abstract

Crystal viscoplasticity enables one to correctly capture the anisotropic inelastic behavior of single crystal and directionally solidified alloys as well as the microstructural sensitivity in polycrystalline alloys. This paper reviews several physics-based crystal viscoplasticity models that have been established to predict the deformation response of Ni-base superalloys. The attributes of crystal viscoplasticity models necessary for predicting the creep-fatigue deformation are identified. Several new developments in constitutive modeling of Ni-base superalloys are discussed.

Keywords:
crystal plasticity, Ni-base superalloy, deformation mechanisms, finite element analysis

Paper ID: JAI103674
DOI: 10.1520/JAI103674
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