A coupled kinetic-constitutive approach to the study of high temperature crack initiation in single crystal nickel-base superalloys☆

Li, Zhao; O’Dowd, Noel P.; Busso, Esteban P.

doi:10.1016/j.jmps.2005.09.001

Cited by 62 publications

(33 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Crack growth criterion proposed in the current work is essentially a strain-based approach, which has been widely used for the prediction of viscoplastic failures such as creep (e.g., Riedel and Rice, 1980;Yatomi, 2003;Zhao et al, 2006). The strains local to a crack tip are of multiaxial nature such that an equivalent strain, which accounts for all strain components, is often adopted as a damage parameter (e.g., Riedel and Rice, 1980;Ritchie and Thompson, 1985;Yatomi, 2003;Zhao et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

“…The strains local to a crack tip are of multiaxial nature such that an equivalent strain, which accounts for all strain components, is often adopted as a damage parameter (e.g., Riedel and Rice, 1980;Ritchie and Thompson, 1985;Yatomi, 2003;Zhao et al, 2006). In the current work, however, only the strain component normal to the crack growth plane was considered, as it is most relevant to material separation in mode I, and it also coincides with the maximum principal strain (Qian et al, 1996).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

A viscoplastic study of crack-tip deformation and crack growth in a nickel-based superalloy at elevated temperature

Tong

2008

Journal of the Mechanics and Physics of Solids

Self Cite

View full text Add to dashboard Cite

Citation: ZHAO, L. and TONG, J., 2008. A viscoplastic study of crack-tip deformation and crack growth in a nickel-based superalloy at elevated temperature. Journal of the Mechanics and Physics of Solids, 56 (12), Additional Information:• This is the author's version of a work that was accepted for publication in the Journal of the Mechanics and Physics of Solids. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subse- AbstractViscoplastic crack tip deformation behaviour in a nickel-based superalloy at elevated temperature has been studied for both stationary and growing cracks in a compact tension (CT) specimen using the finite element method. The material behaviour was described by a unified viscoplastic constitutive model with non-linear kinematic and isotropic hardening rules, and implemented in the finite element software ABAQUS via a userdefined material subroutine (UMAT). Finite element analyses for stationary cracks showed distinctive strain ratchetting behaviour near the crack tip at selected load ratios, leading to progressive accumulation of tensile strain normal to the crack growth plane.Results also showed that low frequencies and superimposed hold periods at peak loads significantly enhanced strain accumulation at crack tip. Finite element simulation of crack growth was carried out under a constant ∆K-controlled loading condition, again ratchetting was observed ahead of the crack tip, similar to that for stationary cracks.A crack growth criterion based on strain-accumulation is proposed where a crack is assumed to grow when the accumulated strain ahead of the crack tip reaches a critical value over a characteristic distance. The criterion has been utilised in the prediction of crack growth rates in a CT specimen at selected loading ranges, frequencies and dwell periods, and the predictions were compared with the experimental results.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

A viscoplastic study of crack-tip deformation and crack growth in a nickel-based superalloy at elevated temperature

Tong

2008

Journal of the Mechanics and Physics of Solids

Self Cite

View full text Add to dashboard Cite

show abstract

“…The crystal plasticity was applied to study creep (Zhao et al 2006), fatigue (Kiyak et al 2008), thermal-mechanical fatigue (Shenoy et al 2005), indentation (Zambaldi et al 2007) and gradient-dependent deformation (Meissonnier et al 2001) of single crystal nickel superalloys. Application of crystal plasticity was also extended to model stress-strain response and fatigue crack nucleation for polycrystalline nickel superalloy (Dunne et al 2007), with microstructure considered as one of the major factors affecting its fatigue and creep properties.…”

Section: Introductionmentioning

confidence: 99%

Modelling plastic deformation in a single-crystal nickel-based superalloy using discrete dislocation dynamics

Lin

Huang

Farukh

et al. 2016

Mech Adv Mater Mod Process

View full text Add to dashboard Cite

Background: Nickel-based superalloys are usually exposed to high static or cyclic loads in non-ambient environment, so a reliable prediction of their mechanical properties, especially plastic deformation, at elevated temperature is essential for improved damage-tolerance assessment of components. Methods: In this paper, plastic deformation in a single-crystal nickel-based superalloy CMSX4 at elevated temperature was modelled using discrete dislocation dynamics (DDD). The DDD approach was implemented using a representative volume element with explicitly-introduced precipitate and periodic boundary condition. The DDD model was calibrated using stress-strain response predicted by a crystal plasticity model, validated against tensile and cyclic tests at 850°C for <001 > and <111 > crystallographic orientations, at a strain rate of 1/s. Results: The DDD model was capable to capture the global stress-strain response of the material under both monotonic and cyclic loading conditions. Considerably higher dislocation density was obtained for the <111 > orientation, indicating more plastic deformation and much lower flow stress in the material, when compared to that for <001 > orientation. Dislocation lines looped around the precipitate, and most dislocations were deposited on the surface of precipitate, forming a network of dislocation lines. Simple unloading resulted in a reduction of dislocation density. Conclusions: Plastic deformation in metallic materials is closely related to dynamics of dislocations, and the DDD approach can provide a more fundamental understanding of crystal plasticity and the evolution of heterogeneous dislocation networks, which is useful when considering such issues as the onset of damage in the material during plastic deformation.

show abstract

“…The crystal plasticity theory has been applied for creep [15,16], fatigue [15,17], thermal-mechanical fatigue [15], indentation deformation [18] and gradient-dependent deformation [13,14] analyses of single crystal nickel superalloys. Application of the theory has also been extended to model stress-strain response and fatigue crack nucleation for polycrystalline nickel superalloy [9,19] where microstructure was considered as one of the major factors influencing the fatigue and creep properties of the material.…”

Section: Introductionmentioning

confidence: 99%

Crystal plasticity modeling of cyclic deformation for a polycrystalline nickel-based superalloy at high temperature

Lin

Tong

et al. 2010

Materials Science and Engineering: A

View full text Add to dashboard Cite

A coupled kinetic-constitutive approach to the study of high temperature crack initiation in single crystal nickel-base superalloys☆

Cited by 62 publications

References 31 publications

A viscoplastic study of crack-tip deformation and crack growth in a nickel-based superalloy at elevated temperature

A viscoplastic study of crack-tip deformation and crack growth in a nickel-based superalloy at elevated temperature

Modelling plastic deformation in a single-crystal nickel-based superalloy using discrete dislocation dynamics

Crystal plasticity modeling of cyclic deformation for a polycrystalline nickel-based superalloy at high temperature

Contact Info

Product

Resources

About