High temperature nanoindentation: The state of the art and future challenges

JM Wheeler, DEJ Armstrong, W Heinz… - Current Opinion in Solid …, 2015 - Elsevier
Nanoindentation measurement capabilities at elevated temperatures have developed
considerably over the last two decades. Commercially available systems can now perform …

Advanced nanoindentation testing for studying strain-rate sensitivity and activation volume

V Maier-Kiener, K Durst - Jom, 2017 - Springer
Nanoindentation became a versatile tool for testing local mechanical properties beyond
hardness and modulus. By adapting standard nanoindentation test methods, simple …

Random critical point separates brittle and ductile yielding transitions in amorphous materials

M Ozawa, L Berthier, G Biroli… - Proceedings of the …, 2018 - National Acad Sciences
We combine an analytically solvable mean-field elasto-plastic model with molecular
dynamics simulations of a generic glass former to demonstrate that, depending on their …

Creep-fatigue damage mechanisms and life prediction based on crystal plasticity combined with grain boundary cavity model in a nickel-based superalloy at 650° C

KS Li, RZ Wang, XC Zhang, ST Tu - International Journal of Plasticity, 2023 - Elsevier
In this study, a dual-scale numerical procedure is developed to reveal the creep-fatigue
damage mechanisms and estimate the crack initiation life for notched structures made of …

Extreme creep resistance in a microstructurally stable nanocrystalline alloy

KA Darling, M Rajagopalan, M Komarasamy… - Nature, 2016 - nature.com
Nanocrystalline metals, with a mean grain size of less than 100 nanometres, have greater
room-temperature strength than their coarse-grained equivalents, in part owing to a large …

Spherical nanoindentation creep behavior of nanocrystalline and coarse-grained CoCrFeMnNi high-entropy alloys

DH Lee, MY Seok, Y Zhao, IC Choi, J He, Z Lu, JY Suh… - Acta Materialia, 2016 - Elsevier
Time-dependent plastic deformation behavior of nanocrystalline (nc) and coarse-grained
(cg) CoCrFeMnNi high-entropy alloys (HEAs) was systematically explored through a series …

Size effects on the mechanical properties of nanocrystalline NbMoTaW refractory high entropy alloy thin films

XB Feng, JY Zhang, YQ Wang, ZQ Hou, K Wu… - International Journal of …, 2017 - Elsevier
The newly-surged high-entropy alloys (HEAs), in particular the refractory HEAs, manifest
excellent properties for practice applications. In this work, we systematically investigated the …

A deformation mechanism based crystal plasticity model of ultrafine-grained/nanocrystalline FCC polycrystals

AS Khan, J Liu - International Journal of Plasticity, 2016 - Elsevier
A new crystal plasticity model based on the deformation mechanism for ultrafine-grained/
nanocrystalline face-centered cubic (FCC) metals was developed. The deformation …

Stress-level-dependency and bimodal precipitation behaviors during creep ageing of Al-Cu alloy: Experiments and modeling

Z Ma, L Zhan, C Liu, L Xu, Y Xu, P Ma, J Li - International Journal of …, 2018 - Elsevier
Understanding the deformation and strengthening mechanism at different stress levels is
crucial for accurate prediction of creep ageing behaviors, especially for alloys subjected to a …

Nanomechanical behavior and structural stability of a nanocrystalline CoCrFeNiMn high-entropy alloy processed by high-pressure torsion

DH Lee, IC Choi, MY Seok, J He, Z Lu… - Journal of Materials …, 2015 - cambridge.org
A CoCrFeNiMn high-entropy alloy (HEA), in the form of a face-centered cubic (fcc) solid
solution, was processed by high-pressure torsion (HPT) to produce a nanocrystalline (nc) …