Correlating CSL Evolution and Strain Energy in Single Step Grain Boundary Engineered Austenitic Stainless Steel

Palaparti, D.P. Rao; Vijayanand, V.D.; Mariappan, M.; Reddy, G.V. Prasad

doi:10.1007/s11661-023-07003-1

Cited by 2 publications

(1 citation statement)

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“…In both cases, twin boundaries (TB) can migrate under shear stress [9]. Strain-induced boundary migration is an underlying mechanism for generating CSL GBs [10] in those processes. Therefore, higher-order twins (e.g., Σ9, Σ27, Σ81, etc) can form from the association and dissociation rules of twin-type CSL GBs during their interaction [11].…”

Section: Introductionmentioning

confidence: 99%

Shear response of 〈110〉 asymmetric tilt grain boundaries in BCC-Fe

Veerababu,

Nagesha,

Shankar

2024

Phys. Scr.

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The present study investigated the effect of shear load on the <110> asymmetric tilt grain boundaries of body-centered cubic iron with molecular dynamics simulations. Various mechanisms like grain boundary (GB) sliding, shear-coupled migration, GB migration with rotation, GB decomposition, and GB deformation with dislocations emission were observed. Low-angle tilt GBs migrated with the help of two dislocation mechanisms, gliding and climbing. Two types of twin nucleation mechanisms were noticed in high-angle tilt GBs with varying tilt angles (η). For 16 ̊ ≤ η ≤ 112 ̊ and η ≥ 130 ̊ cases, dynamic self-adjustment of the atoms at the GBs caused GBs decomposition with the formation of twin boundaries (TBs). Newly nucleated TBs migrated under further applied shear load. For 112 ̊ < η < 130 ̊ case, TBs nucleated from the GB on either side of the misfit dislocations due to their localized core structure on the GB plane.

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Section: Introductionmentioning

confidence: 99%