Tensile deformation of fcc Ni as described by an EAM potential

Farkas, Diana; Patrick, Laura

doi:10.1080/14786430903299329

Cited by 28 publications

(20 citation statements)

References 39 publications

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“…This is the heterogeneous strain. Color coding the sample based on the magnitude of the differences shows the strain localization of the whole sample [29].…”

Section: Simulationmentioning

confidence: 99%

Relationship between localized strain and irradiation assisted stress corrosion cracking in an austenitic alloy

McMurtrey

Was

Patrick

et al. 2011

Materials Science and Engineering: A

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“…This is the heterogeneous strain. Color coding the sample based on the magnitude of the differences shows the strain localization of the whole sample [29].…”

Section: Simulationmentioning

confidence: 99%

Relationship between localized strain and irradiation assisted stress corrosion cracking in an austenitic alloy

McMurtrey

Was

Patrick

et al. 2011

Materials Science and Engineering: A

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“…Both types of grain boundaries are already known to be effective sources for lattice dislocations. 37,38 Our simulations of nanocrystalline Cu and Pd show, however, that other highangle grain boundaries can also exhibit a partially ordered structure. During relaxation of such as-prepared grain boundaries, an array of dislocation embryos evolves ͑see Fig.…”

Section: Figmentioning

confidence: 99%

Nanotwinned fcc metals: Strengthening versus softening mechanisms

2010

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The strengthening effect of twins in nanocrystalline metals has been reported both in experiment and simulation. While twins are mostly considered as effective barriers to dislocation slip transfer, they can also provide nucleation sites for dislocations or migrate during the deformation process, thereby contributing to plasticity. By comparing twinned and nontwinned samples, we study the effect of twins on the deformation behavior of nanocrystalline Cu and Pd using atomistic simulations. While Cu shows hardening due to the presence of twins, Pd shows the opposite effect. A quantitative dislocation analysis method is applied, which allows to analyze dislocation interactions with twin planes and grain boundaries and to measure dislocation, stacking fault, and twin-boundary densities as functions of strain. A statistical analysis of the occurring dislocation types provides direct evidence for the role of twin boundaries as effective sources for twinning dislocations, which are the reason for the observed softening in some fcc materials. In addition, we discuss how the orientation of the loading direction with respect to the twin planes affects the response of nanotwinned Cu and Pd.

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“…By using columnar models with certain texture (random tilt misorientations around a common type axis), Caturla et al [42] and Zheng and Zhang [43] conducted atomistic simulations to study the different roles of high-angle and low-angle grain boundaries on mechanical deformation of nanocrystalline metals. Farkas et al [44][45][46][47] investigated the grain boundary accommodation of plasticity in h1 1 0i columnar nanocrystalline metals and found that some typical grain boundary structures, such as low-angle GB, vicinal twin boundary and non-planar GB, can play a significant role in dislocation emission. Tucker and Foiles [48] recently used MD simulations to elucidate the role of twin boundaries on the deformation of h1 0 0i columnar nanocrystalline Cu.…”

Section: Simulation Model Of Grain Boundarymentioning

confidence: 99%