Effect of rhenium on low cycle fatigue behaviors of Ni-based single crystal superalloys: a molecular dynamics simulation

Wu, Wen Bing; Ding, Zi-Jun; Chen, Bin; Shen, Hong-Fei; Li, Yun-Li

doi:10.1016/j.jmrt.2022.05.005

Cited by 9 publications

(2 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This EAM potential has been benchmarked by experimental and first-principles data, and adopted to study a series of properties of Ni-based superalloys, including the alloying dopants segregations, lattice trapping, interface crack propagation, etc. [ 3 , 14 , 19 , 21 , 22 , 23 ]. It also maintains the stability of our 3D model in MD simulations.…”

Section: Methodsmentioning

confidence: 99%

The Tunable Rhenium Effect on the Creep Properties of a Nickel-Based Superalloy

Tang,

Guo

2023

Materials

View full text Add to dashboard Cite

Atomistic simulations on the creep of a nickel-based single-crystal superalloy are performed for examining whether the so-called rhenium effect can be tuned by changing the spatial distribution of rhenium in the nickel matrix phase. Results show that Rhenium dopants at {100} phase interfaces facilitate mobile partial dislocations, which intensify the creep, leading to a larger creep strain than that of a pure Ni/Ni3Al system containing no alloying dopants. If all the Re dopants in the matrix phase are far away from phase interfaces, a conventional retarding effect of Re can be observed. The current study implies a tunable Re effect on creep via dislocation triggering at the phase interfaces.

show abstract

Section: Methodsmentioning

confidence: 99%

The Tunable Rhenium Effect on the Creep Properties of a Nickel-Based Superalloy

Tang,

Guo

2023

Materials

View full text Add to dashboard Cite

show abstract

“…The simulation result shows slip band formation, dislocation emission, and crack nucleation at the grain boundaries, as well as vacancies and other key information. In recent years, the study of the fatigue crack propagation mechanism by molecular dynamics simulation has gradually increased [ 11 , 12 , 13 ]. Dogan used LAMMPS to study the tensile response of 4340 steel in a hydrogen environment.…”

Section: Introductionmentioning

confidence: 99%

The Study on Fatigue Crack Growth Rate of 4130X Material under Different Hydrogen Corrosion Conditions

Jiang,

Wang,

Zhao

et al. 2024

Materials

View full text Add to dashboard Cite

In this paper, the fatigue crack growth rates of typical pressure vessel material 4130X under different corrosion conditions are investigated, and the effects of corrosion modes and loading frequency on the fatigue crack growth rate of 4130X are discussed. The results show that under the same loading conditions, the pre-corroded crack propagation rate is increased by 1.26 times compared with the uncorroded specimens. The plastic deformation mechanism of the crack tip in air is dominated by phase transformation but the hydrogen introduced by pre-corrosion causes a small number of dislocations at the crack tip. The crack growth rate obtained by corrosion fatigue is four times that of the uncorroded specimen, and the fracture surface shows a strong corrosion effect. The molecular dynamics simulation shows that the hydrogen atoms accumulated at the crack tip make the plastic deformation mechanism dominated by dislocation in the crack propagation process, and the coupling interaction between low frequency and the corrosion environment aggravates the hydrogen embrittlement of the crack tip. In the air condition, the loading frequency has no obvious effect on the crack growth rate: when the frequency decreases from 100 Hz to 0.01 Hz and other conditions remain unchanged, the fatigue crack growth rate increases by 1.5 times. The parameter n in the Paris expression is mainly influenced by frequency. The molecular dynamics simulation shows that low frequency promotes crack tip propagation.

show abstract

Molecular dynamics simulation of thermomechanical fatigue properties of Ni-based single crystal superalloys

Ding

et al. 2023

International Journal of Fatigue

View full text Add to dashboard Cite

Effect of rhenium on low cycle fatigue behaviors of Ni-based single crystal superalloys: a molecular dynamics simulation

Cited by 9 publications

References 64 publications

The Tunable Rhenium Effect on the Creep Properties of a Nickel-Based Superalloy

The Tunable Rhenium Effect on the Creep Properties of a Nickel-Based Superalloy

The Study on Fatigue Crack Growth Rate of 4130X Material under Different Hydrogen Corrosion Conditions

Molecular dynamics simulation of thermomechanical fatigue properties of Ni-based single crystal superalloys

Contact Info

Product

Resources

About