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• W3099324982 abstract "Large-scale atomistic simulations with classical potentials can provide valuable insights into microscopic deformation mechanisms and defect-defect interactions in materials. Unfortunately, these assets often come with the uncertainty of whether the observed mechanisms are based on realistic physical phenomena or whether they are artifacts of the employed material models. One such example is the often reported occurrence of stable planar faults (PFs) in body-centered cubic (bcc) metals subjected to high strains, e.g., at crack tips or in strained nano-objects. In this paper, we study the strain dependence of the generalized stacking fault energy (GSFE) of {110} planes in various bcc metals with material models of increasing sophistication, i.e., (modified) embedded atom method, angular-dependent, Tersoff, and bond-order potentials as well as density functional theory. We show that under applied tensile strains the GSFE curves of many classical potentials exhibit a local minimum which gives rise to the formation of stable PFs. These PFs do not appear when more sophisticated material models are used and have thus to be regarded as artifacts of the potentials. We demonstrate that the local GSFE minimum is not formed for reasons of symmetry and we recommend including the determination of the strain-dependent (110) GSFE as a benchmark for newly developed potentials." @default.
• W3099324982 created "2020-11-23" @default.
• W3099324982 creator A5009822181 @default.
• W3099324982 creator A5022871779 @default.
• W3099324982 creator A5032867953 @default.
• W3099324982 creator A5047496331 @default.
• W3099324982 creator A5052903842 @default.
• W3099324982 creator A5057201981 @default.
• W3099324982 creator A5063333508 @default.
• W3099324982 creator A5071213335 @default.
• W3099324982 creator A5078990821 @default.
• W3099324982 date "2018-09-19" @default.
• W3099324982 modified "2023-10-14" @default.
• W3099324982 title "<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mo>{</mml:mo><mml:mn>110</mml:mn><mml:mo>}</mml:mo></mml:mrow></mml:math> planar faults in strained bcc metals: Origins and implications of a commonly observed artifact of classical potentials" @default.
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