[HTML][HTML] Mild-to-wild plastic transition is governed by athermal screw dislocation slip in bcc Nb
Plastic deformation in crystals is mediated by the motion of line defects known as
dislocations. For decades, dislocation activity has been treated as a homogeneous, smooth …
dislocations. For decades, dislocation activity has been treated as a homogeneous, smooth …
Avalanche Dynamics and the Effect of Straining in Dislocation Systems with Quenched Disorder
D Berta, B Mendei, PD Ispánovity - arXiv preprint arXiv:2404.18871, 2024 - arxiv.org
The plastic deformation of crystalline and other heterogeneous materials often manifests in
stochastic intermittent events indicating the criticality of plastic behavior. Previous studies …
stochastic intermittent events indicating the criticality of plastic behavior. Previous studies …
Avalanches and plastic flow in crystal plasticity: an overview
Crystal plasticity is mediated through dislocations, which form knotted configurations in a
complex energy landscape. Once they disentangle and move, they may also be impeded by …
complex energy landscape. Once they disentangle and move, they may also be impeded by …
Glassy features of crystal plasticity
A Lehtinen, G Costantini, MJ Alava, S Zapperi… - Physical Review B, 2016 - APS
Crystal plasticity occurs by deformation bursts due to the avalanchelike motion of
dislocations. Here we perform extensive numerical simulations of a three-dimensional …
dislocations. Here we perform extensive numerical simulations of a three-dimensional …
[HTML][HTML] Quenched pinning and collective dislocation dynamics
M Ovaska, L Laurson, MJ Alava - Scientific reports, 2015 - nature.com
Several experiments show that crystalline solids deform in a bursty and intermittent fashion.
Power-law distributed strain bursts in compression experiments of micron-sized samples …
Power-law distributed strain bursts in compression experiments of micron-sized samples …
[HTML][HTML] Statistics of dislocation avalanches in FCC and BCC metals: dislocation mechanisms and mean swept distances across microsample sizes and temperatures
Plastic deformation in crystalline materials consists of an ensemble of collective dislocation
glide processes, which lead to strain burst emissions in micro-scale samples. To unravel the …
glide processes, which lead to strain burst emissions in micro-scale samples. To unravel the …
Bright x-rays reveal shifting deformation states and effects of the microstructure on the plastic deformation of crystalline materials
The plastic deformation of crystalline materials is usually modeled as smoothly progressing
in space and time, yet modern studies show intermittency in the deformation dynamics of …
in space and time, yet modern studies show intermittency in the deformation dynamics of …
[HTML][HTML] Transformation-and twinning-induced plasticity in phase-separated bcc Nb-Zr alloys: an atomistic study
Several high-temperature body-centered cubic (bcc) structural materials such as Nb-, Zr-and
Ti-based alloys undergo phase separation, which is a second-order phase transformation …
Ti-based alloys undergo phase separation, which is a second-order phase transformation …
Universality class of nanocrystal plasticity: localization and self-organization in discrete dislocation dynamics
The universality class of the avalanche behavior in plastically deforming crystalline and
amorphous systems has been commonly discussed, despite the fact that the microscopic …
amorphous systems has been commonly discussed, despite the fact that the microscopic …
In-situ investigation of dislocation tangle–untangle processes in small-sized body-centered cubic Nb single crystals
Time-resolved dislocation tangle and untangle processes in small-sized body-centered
cubic (BCC) niobium single crystal samples were investigated using in-situ nanoindentation …
cubic (BCC) niobium single crystal samples were investigated using in-situ nanoindentation …