Crystallographic-orientation-dependent unconventional twinning pathway at the crack tip of body-centered cubic tantalum

G Wei, H Xie, GH Lu - Philosophical Magazine, 2023 - Taylor & Francis
Anti-twin has been experimentally observed in body-centered cubic nanopillars, which
naturally raises the reconsideration of twinning pathways at the crack tips. Using molecular …

Atomistic observation of a crack tip approaching coherent twin boundaries

L Liu, J Wang, SK Gong, SX Mao - Scientific reports, 2014 - nature.com
Coherent twin boundaries (CTBs) in nano-twinned materials could improve crack resistance.
However, the role of the CTBs during crack penetration has never been explored at atomic …

Deformation twinning in response to cracking in Al: an in situ TEM and molecular dynamics study

Z Kou, Y Yang, L Yang, W Zhang, B Huang, X Luo - Scripta Materialia, 2018 - Elsevier
In situ tension tests in a transmission electron microscope and molecular dynamics
simulations were carried out on pure Al, revealing a localized twinning-responded cracking …

Competing twinning mechanisms in body-centered cubic metallic nanowires

Z Shi, CV Singh - Scripta Materialia, 2016 - Elsevier
Twinning in body-centered cubic metals is typically attributed to glide of 1/6< 111>
dislocations originated from material defects. Here we report an alternative mechanism for …

Molecular dynamics simulation of the interaction between nanoscale twin boundaries and partial dislocations

H Zhou, S Qu - Journal of Computational and Theoretical …, 2010 - ingentaconnect.com
Nanoscale twin boundaries (TBs) were recently reported to be capable of enhancing the
strength and ductility of materials simultaneously. In the present work, molecular dynamics …

Twin boundaries merely as intrinsically kinematic barriers for screw dislocation motion in FCC metals

J Zhang, H Zhang, H Ye, Y Zheng - Scientific reports, 2016 - nature.com
Metals with nanoscale twins have shown ultrahigh strength and excellent ductility, attributed
to the role of twin boundaries (TBs) as strong barriers for the motion of lattice dislocations …

[HTML][HTML] Alternating brittle and ductile response of coherent twin boundaries in nanotwinned metals

T Sinha, Y Kulkarni - Journal of Applied Physics, 2014 - pubs.aip.org
Nanotwinned metals have opened exciting avenues for the design of high strength and high
ductility materials. In this work, we investigate crack propagation along coherent twin …

In situ atomistic observation of the deformation mechanism of Au nanowires with twin–twin intersection

S Zhao, Q Zhu, X An, H Wei, K Song, SX Mao… - Journal of Materials …, 2020 - Elsevier
Twin–twin intersections are often observed in face-centered cubic (FCC) metallic
nanostructures, which have important contributions to the plastic deformation and …

Deciphering the interactions between single arm dislocation sources and coherent twin boundary in nickel bi-crystal

V Samaee, M Dupraz, T Pardoen… - Nature …, 2021 - nature.com
The introduction of a well-controlled population of coherent twin boundaries (CTBs) is an
attractive route to improve the strength ductility product in face centered cubic (FCC) metals …

A plastic deformation mechanism by necklace dislocations near crack-like defects in nanotwinned metals

H Zhou, H Gao - Journal of Applied Mechanics, 2015 - asmedigitalcollection.asme.org
Nanotwinned metals are a class of hierarchically structured materials that appear to
transcend the limits of conventional material systems by exhibiting an exceptional …