High entropy alloys: A focused review of mechanical properties and deformation mechanisms

EP George, WA Curtin, CC Tasan - Acta Materialia, 2020 - Elsevier
The high-entropy alloy (HEA) concept was based on the idea that high mixing entropy can
promote formation of stable single-phase microstructures. During the past 15 years, various …

Effect of the aging process and pre-deformation on the precipitated phase and mechanical properties of 2195 Al–Li alloy

B Xie, L Huang, J Xu, H Su, H Zhang, Y Xu, J Li… - Materials Science and …, 2022 - Elsevier
Abstract Third-generation Al–Li alloys, represented by 2195 Al–Li alloy, have considerable
application opportunities in lightweight aerospace structures. This work investigates the …

Unraveling the dislocation–precipitate interactions in high-entropy alloys

J Li, H Chen, Q Fang, C Jiang, Y Liu, PK Liaw - International Journal of …, 2020 - Elsevier
The precipitates play a significant role in not only enhancing the strength, but also
maintaining the high toughness in alloys. However, the interactions of the nanoscale …

Machine learning for metallurgy I. A neural-network potential for Al-Cu

D Marchand, A Jain, A Glensk, WA Curtin - Physical review materials, 2020 - APS
High-strength metal alloys achieve their performance via careful control of precipitates and
solutes. The nucleation, growth, and kinetics of precipitation, and the resulting mechanical …

Dynamic tensile fracture of iron: Molecular dynamics simulations and micromechanical model based on dislocation plasticity

VV Pogorelko, AE Mayer - International Journal of Plasticity, 2023 - Elsevier
Molecular dynamics (MD) shows a difference in the mechanisms of fracture of iron under
uniaxial and isotropic tension. Uniaxial tension leads to the formation of a complex …

Beyond Orowan hardening: Mapping the four distinct mechanisms associated with dislocation-precipitate interaction

S Peng, Z Wang, J Li, Q Fang, Y Wei - International Journal of Plasticity, 2023 - Elsevier
The conventional role played by precipitates in crystalline solids is in blocking the motion of
dislocations and for consequentially hardening, a mechanism attributed to Orowan's finding …

Prediction of shear strength of cluster-strengthened aluminum with multi-scale approach describing transition from cutting to bypass of precipitates by dislocations

EV Fomin, AE Mayer, VS Krasnikov - International Journal of Plasticity, 2021 - Elsevier
We investigate the deformation of aluminum alloy containing copper in the form of fine Al-Cu
clusters 1–4 nm in diameter with multiscale approach. A part of these precipitates (clusters of …

An analysis of the influence of the precipitate type on the mechanical behavior of Al-Cu alloys by means of micropillar compression tests

B Bellón, S Haouala, J LLorca - Acta Materialia, 2020 - Elsevier
The influence of different types of precipitates (either Guinier-Preston zones, θ ″or θ′) on
the critical resolved shear stress and strain hardening was determined by means of …

Superposed hardening from precipitates and dislocations enhances strength-ductility balance in Al-Cu alloy

J Yang, C Liu, P Ma, L Chen, L Zhan, N Yan - International Journal of …, 2022 - Elsevier
The age hardening response and tensile properties in an Al-Cu alloy pre-deformed by 20-
80% and post-aged at 120-165° C have been examined to study the effect of mixed …

Dislocation nucleation in Al single crystal at shear parallel to (111) plane: Molecular dynamics simulations and nucleation theory with artificial neural networks

AE Mayer, VS Krasnikov, VV Pogorelko - International Journal of Plasticity, 2021 - Elsevier
We develop the theory of homogeneous nucleation of dislocations, which predicts plasticity
incipience in FCC single crystal using material properties at elastic stage. In contrast to …