Twinning mechanism asymmetry in body-centered cubic tantalum under [001] uniaxial compression/tension

G Wei, H Xie, F Yin, G Lu - Physical Review Materials, 2021 - APS
… mechanism of nanoscale BCC tungsten was also … tungsten nanowires was studied by
conducting in situ TEM nanomechanical testing. It was found that twinning also occurs in tungsten

On the significance of model design in atomistic calculations of the Peierls stress in Nb

WR Jian, S Xu, IJ Beyerlein - Computational Materials Science, 2021 - Elsevier
… /anti-twinning asymmetry, we repeat calculations of the Peierls stress using the six model
configurations. The twinning/anti-twinning … In contrast, the anti-twinning direction requires the …

[HTML][HTML] Grain boundary elimination by twinning and dislocation nucleation in front of intergranular crack tips in BCC iron

Z Zhao, B Safaei, Y Wang, F Chu, Y Wei - Materials & Design, 2022 - Elsevier
… All twinning bands are formed by atomic slip along ordinary twinning direction, but all
dislocations are nucleated by atomic slip along anti-twinning direction. Mechanisms of twinning …

Molecular-Dynamics Analysis of the Mechanical Behavior of Plasma-Facing Tungsten

A Weerasinghe, E Martinez, BD Wirth… - ACS Applied Materials …, 2023 - ACS Publications
… We find that the Young modulus of defective tungsten undergoes substantial softening …
nanoscale spherical defects (empty voids and He bubbles) reduces the yield strength of tungsten

Unraveling the temperature dependence of the yield strength in single-crystal tungsten using atomistically-informed crystal plasticity calculations

D Cereceda, M Diehl, F Roters, D Raabe… - International Journal of …, 2016 - Elsevier
… -Schmid tensors representing respectively the twinning/anti-twinning asymmetry (T/AT) and
… from a geometric asymmetry between the twinning and anti-twinning directions of the <111> …

Competition between full slip and twinning in BCC-Fe: Effect of preloaded stress and temperature

J Veerababu, A Nagesha - Journal of Applied Physics, 2023 - pubs.aip.org
… As per our knowledge, these studies are lacking on BCC systems at the nanoscale, especially
in BCC-Fe. Hence, in the present study, we attempt to understand the effects of preloaded …

Mapping pure plastic strains against locally applied stress: Revealing toughening plasticity

TEJ Edwards, X Maeder, J Ast, L Berger, J Michler - Science Advances, 2022 - science.org
nanoscale resolution. The material studied, body-centered cubic (bcc) single-crystal tungsten,
… -static conditions, twinning—and anti-twinning—in tungsten has only been observed at the …

Orientation-dependent deformation mechanisms of bcc niobium nanoparticles

JJ Bian, L Yang, XR Niu, GF Wang - Philosophical Magazine, 2018 - Taylor & Francis
… of the Hertzian contact model in nanoscale contact [Citation38]… planes, both twinning and
anti-twinning slip systems can be … plastic deformation of molybdenum and tungsten: I. Atomistic …

Temperature insensitivity of the flow stress in body-centered cubic micropillar crystals

Y Cui, G Po, N Ghoniem - Acta Materialia, 2016 - Elsevier
… -size space is proposed to further illustrate this phenomenon in tungsten micropillars. … the
non-Schmid effect, the twinning/anti-twinning and the tension/compression asymmetries, etc [23…

The anisotropy of deformation twinning in bcc materials: Mechanical loading, temperature effect, and twin–twin interaction

AH Zahiri, M Lotfpour, J Ombogo, E Vitral, L Cao - Acta Materialia, 2024 - Elsevier
… in nanoscale iron (Fe) … nanoscale bcc tungsten. This study revealed that the nucleation and
growth of antitwinning require ultrahigh stresses, a condition made feasible by the nanoscale