On the effect of slip transfer at grain boundaries on the strength of FCC polycrystals

Nieto-Valeiras, E.; Haouala, S.; Llorca, Javier

doi:10.1016/j.euromechsol.2021.104427

Cited by 18 publications

(2 citation statements)

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“…The von Mises stress inside the GBs is significantly higher than other locations of the NC CuCrFeNiCo HEA and the TN CuCrFeNiCo HEA samples. A similar result has also been found by Nieto-Valeiras et al [57], Tran et al [58], and Doan et al [59] in previous studies. These phenomena are caused by the anisotropic elastic and of the incompatible plastic deformation between grains with different orientations.…”

Section: The Influences Of Boundary Conditionssupporting

confidence: 90%

Crack growth and fracture mechanics of CuCrFeNiCo high-entropy alloy during tension testing

Tran,

Chu,

Trinh

et al. 2024

Phys. Scr.

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In this work, the crack growth and fracture mechanics of CuCrFeNiCo high-entropy alloy (HEA) during tension process are studied through molecular dynamics simulation method. The single-crystalline, nanocrystalline, and twinned-nanocrystalline CuCrFeNiCo HEA samples with an initial crack are prepared. The influences of boundary conditions, crack length and crystallographic orientation are considered in detail. The results indicate that the phase transition from face-centered cubic (FCC) structure into hexagonal close-packed (HCP) structure and the appearance of Shockley dislocations are the majority in all samples. The dislocations appear most densely in the twinned-nanocrstalline sample and most sparsely in the single-crystalline sample. The growth of the initial crack combined with the formation and expansion of new cracks along the grain boundaries (GBs) is the determining factor in the fracture mechanics of the CuCrFeNiCo HEA samples. The deformation capacity of the samples with free boundary conditions along the y-axis is better and the plastic deformation process is longer than the samples with periodic boundary conditions along the y-axis. The tensile strength values of the CuCrFeNiCo HEA samples change significantly in the range from 2.61 GPa to 7.75 GPa when changing the simulation conditions. The von Mises stress in the grains is markedly lower than that in the GBs.

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Section: The Influences Of Boundary Conditionssupporting

confidence: 90%

Crack growth and fracture mechanics of CuCrFeNiCo high-entropy alloy during tension testing

Tran,

Chu,

Trinh

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…The precise identification of slip system is very important, for instance, in order to assess the geometrical factors that determine whether slip transfer or blocking occurs at grain boundaries. This information can be used within the framework of crystal plasticity to develop microstructure-based models for polycrystalline deformation [22,23]. Among the different criteria to assess slip transfer at grain boundaries, the geometric compatibility factor or Luster-Morris parameter (m′) is one of the most relevant ones [24][25][26][27][28].…”

mentioning

confidence: 99%

Identification of active slip systems in polycrystals by Slip Trace - Modified Lattice Rotation Analysis (ST-MLRA)

et al. 2022

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Study of Serrated Boundary Micromechanics During Micropillar Compression in Nickel-Based Superalloy

Dash,

Shi,

Chiu

2024

Metall Mater Trans A

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On the effect of slip transfer at grain boundaries on the strength of FCC polycrystals

Cited by 18 publications

References 50 publications

Crack growth and fracture mechanics of CuCrFeNiCo high-entropy alloy during tension testing

Crack growth and fracture mechanics of CuCrFeNiCo high-entropy alloy during tension testing

Identification of active slip systems in polycrystals by Slip Trace - Modified Lattice Rotation Analysis (ST-MLRA)

Study of Serrated Boundary Micromechanics During Micropillar Compression in Nickel-Based Superalloy

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