Revealing the deformation mechanisms of nanograins in gradient nanostructured Cu and CuAl alloys under tension

JJ Wang, NR Tao, K Lu - Acta Materialia, 2019 - Elsevier
A gradient nanostructured (GNS) surface layer was induced on coarse-grained (CG) Cu and
CuAl alloys by means of surface mechanical grinding treatment. The GNS/CG Cu-4.5 Al …

Micromechanical simulation of fracture behavior of bimodal nanostructured metals

X Guo, R Ji, GJ Weng, LL Zhu, J Lu - Materials Science and Engineering: A, 2014 - Elsevier
Nanostructured (NS) metals with bimodal grain size distribution that consist of coarse
grained (CG) and nano-grained (NG) regions have proved to have both high strength and …

On elastic gaps in strain gradient plasticity: 3D discrete dislocation dynamics investigation

YA Amouzou-Adoun, M Jebahi, M Fivel, S Forest… - Acta Materialia, 2023 - Elsevier
Although presenting attractive features in dealing with small-scale size effects, strain
gradient plasticity (SGP) theories can lead to uncommon phenomena for some boundary …

A physical model revealing strong strain hardening in nano-grained metals induced by grain size gradient structure

J Li, S Chen, X Wu, AK Soh - Materials Science and Engineering: A, 2015 - Elsevier
A theoretical model has been developed, which reveals the underlying correlation between
the strong extra strain hardening achieved in the nano-grained layers of the grain size …

Strong and plastic metallic composites with nanolayered architectures

ZH Cao, W Sun, YJ Ma, Q Li, Z Fan, YP Cai, ZJ Zhang… - Acta Materialia, 2020 - Elsevier
Nanostructured metals and alloys are generally strong but lack strain hardening due to
enhanced grain boundary diffusion and sliding. Here, equal nanograined (ENG) and …

Crystal cracking of grain-gradient aluminum by a combined CPFEM-CZM method

LY Liu, QS Yang, X Liu, XC Nian - Engineering Fracture Mechanics, 2021 - Elsevier
Gradient nanostructured metals attract extensive attention due to their excellent mechanical
properties, while they are prone to microcracks during forming and servicing process and …

Extraordinary strain hardening by gradient structure

XL Wu, P Jiang, L Chen, F Yuan… - Heterostructured Materials, 2021 - taylorfrancis.com
This chapter reports the discovery of a hitherto unknown strain hardening mechanism, which
is intrinsic to the gradient structure in an engineering material. The gradient structure shows …

Equivalent plastic strain gradient plasticity with grain boundary hardening and comparison to discrete dislocation dynamics

E Bayerschen, M Stricker… - … of the Royal …, 2015 - royalsocietypublishing.org
The gradient crystal plasticity framework of Wulfinghoff et al.(Wulfinghoff et al. 2013 Int. J.
Plasticity 51, 33–46.(doi: 10.1016/j. ijplas. 2013.07. 001)), incorporating an equivalent …

Abnormal grain coarsening in cyclically deformed gradient nanograined Cu

JZ Long, QS Pan, NR Tao, L Lu - Scripta Materialia, 2018 - Elsevier
Microstructural evolution of gradient nanograined (GNG) Cu was investigated under strain-
controlled cyclic deformation. Mechanically driven abnormal grain coarsening initiated from …

Size-dependent yield stress in ultrafine-grained polycrystals: A multiscale discrete dislocation dynamics study

S Lu, Q Kan, M Zaiser, Z Li, G Kang, X Zhang - International Journal of …, 2022 - Elsevier
In this study, the effects of grain size and dislocation source properties on the yield stress of
ultrafine-grained (UFG) polycrystals were examined using three-dimensional multiscale …