Revealing the deformation mechanisms of< 110> symmetric tilt grain boundaries in CoCrNi medium-entropy alloy

D Hua, Q Zhou, Y Shi, S Li, K Hua, H Wang, S Li… - International Journal of …, 2023 - Elsevier
The synergy of multiple deformation mechanisms responsible for the excellent mechanical
properties attracts an increasing interest in CoCrNi medium entropy alloy (MEA). In this …

Grain boundary engineering during the laser powder bed fusion of TiC/316L stainless steel composites: New mechanism for forming TiC-induced special grain …

J Li, H Qu, J Bai - Acta Materialia, 2022 - Elsevier
In this work, we demonstrate a novel machining solution for controlling microstructures with
special grain boundaries and nanotwins in composites during laser powder bed fusion …

Suppressed Size Effect in Nanopillars with Hierarchical Microstructures Enabled by Nanoscale Additive Manufacturing

W Zhang, Z Li, R Dang, TT Tran, RA Gallivan… - Nano Letters, 2023 - ACS Publications
Studies on mechanical size effects in nanosized metals unanimously highlight both intrinsic
microstructures and extrinsic dimensions for understanding size-dependent properties …

In situ study on plastic deformation mechanism of Al0. 3CoCrFeNi high-entropy alloys with different microstructures

X Ma, H Zhai, L Song, W Zhang, Y Hu… - Materials Science and …, 2022 - Elsevier
Abstract Al 0.3 CoCrFeNi high-entropy alloys (HEAs) have attracted the attention of
researchers owing to their excellent mechanical properties. In this study, Al 0.3 CoCrFeNi …

On the plastic deformation mechanism of Al0. 6CoCrFeNi high entropy alloy: In-situ EBSD study and crystal plasticity modeling

H Zhai, B Yao, W Zhang, H Lin, X Ma, Y Li… - Materials Science and …, 2024 - Elsevier
In this study, in-situ tensile tests with electron back-scattered diffraction (EBSD) were
conducted to reveal the microstructural effects on the plastic deformation behavior of dual …

Microstructure relevant fatigue short crack propagation behavior of Al0. 3CoCrFeNi high entropy alloy: in-situ SEM study

H Zhai, W Zhang, J Jiang, X Ma, H Lin, C Xiao… - International Journal of …, 2023 - Elsevier
The microstructure effects on fatigue short crack propagation behavior of Al 0.3 CoCrFeNi
high entropy alloys (HEAs) were studied by in-situ fatigue testing under scanning electron …

Strengthening mechanisms of semi-coherent boundaries between Al8Mn4Y and the Mg matrix in magnesium alloys

Y Chen, Z Zhu, MA Siddiq, K Li, J Zhou - Materials Science and …, 2023 - Elsevier
Cracking at phase or grain boundaries has been demonstrated as the dominant failure
mode in Mg alloys, emphasizing the necessity for boundary enhancement to improve both …

Dislocation pileups in small grains

R Schouwenaars, LAI Kestens - International Journal of Plasticity, 2023 - Elsevier
While the grain size effect (GSE) is universally observed in polycrystalline metals and alloys,
extended dislocation pileups (DPUs) at grain boundaries (GBs) are rarely observed …

Experimental investigation of dislocation-grain boundary interaction in coarse-grained high‑manganese steels using quasi in situ electron channelling contrast …

D An, X Liu, Y Liu, X Li, J Chen - Materials Characterization, 2023 - Elsevier
Dislocation behaviour can be significantly modulated by the presence of grain boundaries
(GBs), which results in a tremendous change in the mechanical properties of polycrystalline …

Microstructure sensitivity of the low cycle fatigue crack initiation mechanisms for the Al0. 3CoCrFeNi high entropy alloy: in-situ SEM study and crystal plasticity …

H Zhai, J Jiang, W Zhang, Q Zhang, X Ma… - International Journal of …, 2023 - Elsevier
In this study, in-situ fatigue tests under scanning electron microscopy (SEM) were performed
to reveal the relationship between grain slip deformation and fatigue crack initiation of Al 0.3 …