Analytic model of dislocation density evolution in fcc polycrystals accounting for dislocation generation, storage, and dynamic recovery mechanisms

A Hunter, DL Preston - International Journal of Plasticity, 2022 - Elsevier
An analytic model of the evolution of dislocation density in fcc polycrystals is described. The
evolution equations approximately account for most known dislocation storage, dynamic …

Excellent dynamic-mechanical behavior assisted by stacking faults in a nano-coherent high-entropy alloy

JL Yuan, ZM Jiao, Z Wang, JW Qiao, PD Han… - Materials Science and …, 2023 - Elsevier
In the current work, the coherent L1 2-phases-strengthened Co 40 Cr 20 Ni 30 Mo 2 Al 4 Ti 4
(in atomic percent, at.%) high-entropy alloy (HEA) exhibits an excellent strength-plasticity …

A broad study of tantalum strength from ambient to extreme conditions

MB Prime, A Arsenlis, RA Austin, NR Barton… - Acta Materialia, 2022 - Elsevier
By combining experiments and modeling from three US national laboratories, we explore
compressive strength in a well-characterized material, tantalum, across pressures from zero …

A computational mechanical constitutive modeling method based on thermally-activated microstructural evolution and strengthening mechanisms

M Lei, G Sun, G Yang, B Wen - International Journal of Plasticity, 2024 - Elsevier
A mechanical constitutive relationship is the basis for the design and application of structural
materials, and the establishment of a mechanical constitutive relationship generally relies on …

The effect of temperature on the elastic precursor decay in shock loaded FCC aluminium and BCC iron

B Gurrutxaga-Lerma, MA Shehadeh, DS Balint… - International Journal of …, 2017 - Elsevier
This article offers a comprehensive experimental and theoretical study of the causes of
thermal hardening in FCC Al and BCC Fe at high strain rates, with the aim to shed light on …

Simulation of dislocation evolution in microparticle impacts over a wide range of impact velocities

K Larkin, A Hunter, M Buechler - International Journal of Plasticity, 2022 - Elsevier
The dynamic loading environment created by high velocity microparticle impacts is very
difficult to model. The extremely high strain rates, large deformations, and high temperatures …

Shock wave compression behavior and dislocation density evolution in Al microstructures at the atomic scales and the mesoscales

G Agarwal, RR Valisetty, AM Dongare - International Journal of Plasticity, 2020 - Elsevier
Molecular dynamics simulations are carried out to investigate the deformation response
during shock compression of nanocrystalline Al microstructures at the atomic scales. The …

Dynamic tensile deformation and microstructural evolution of AlxCrMnFeCoNi high-entropy alloys

CM Cao, W Tong, SH Bukhari, J Xu, YX Hao… - Materials Science and …, 2019 - Elsevier
The influence of microstructure and strain rate on tensile behavior of Al x CrMnFeCoNi (x= 0,
0.4 and 0.6 in molar ratio) high-entropy alloys was investigated. The alloys with lower Al …

Dislocation drag from phonon wind in an isotropic crystal at large velocities

DN Blaschke, E Mottola, DL Preston - Philosophical Magazine, 2020 - Taylor & Francis
The anharmonic interaction and scattering of phonons by a moving dislocation, the photon
wind, imparts a drag force v B (v, T, ρ) on the dislocation. In early studies, the drag coefficient …

A unified model for coupling constitutive behavior and micro-defects evolution of aluminum alloys under high-strain-rate deformation

S Yan, H Yang, H Li, X Yao - International Journal of Plasticity, 2016 - Elsevier
High strain rate forming (HSRF) is promising to break through the conventional forming limit
of materials and thus to form hard-to-deform components. During HSRF process, long …