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Papers
61,005 resultsShowing papers similar to Strain-dependent evolution of avalanche dynamics in bulk metallic glass
ClearViscosity and transport in a model fragile metallic glass
This paper uses the term 'microplasticity' in the context of metallic glass physics, describing how thermally activated atomic movements drive deformation in amorphous metals at the microscale. This is a materials physics paper unrelated to environmental microplastic pollution.
Avalanche statistics and the intermittent-to-smooth transition in microplasticity
This physics study found that at very small scales, crystal plasticity transitions from intermittent to smooth flow as deformation rate increases. It is a materials science paper on metal deformation mechanics, unrelated to environmental microplastics.
Elasto-plastic behavior of amorphous materials: a brief review
This materials science review discusses how disordered (amorphous) materials like metallic and silicate glasses deform plastically at the atomic scale, focusing on localized shear band formation. The term 'plasticity' here refers to material deformation behavior, not environmental plastic particles.
Stress breaks universal aging behavior in a metallic glass
Researchers discovered that applying mechanical stress to metallic glass — an amorphous, non-crystalline metal — disrupts the material's predictable aging behavior by triggering localized microscale plastic deformation events (called microplastic events) that cause irregular, unpredictable changes in the material's internal structure. This finding challenges a long-standing universal model used to predict how metallic glasses behave under stress over time.
Metallic glasses: Elastically stiff yet flowing at any stress
Researchers demonstrated that metallic glass, an amorphous solid with high yield stress, lacks a true microscopic elastic limit. Using coherent X-ray scattering, they found that even extremely small stresses accelerate atomic-scale transport within the material. The findings reveal fundamental differences in how amorphous and crystalline solids respond to mechanical stress at the atomic level.
Nontrivial scaling exponents of dislocation avalanches in microplasticity
This physics study analyzed the statistical patterns of small-scale deformation events (dislocation avalanches) in metals to test theoretical models of material plasticity. The research is in materials physics and is not related to environmental microplastics.
Fluctuations in crystalline plasticity
This theoretical physics paper reviews the statistical patterns of intermittent plastic deformation events—called dislocation avalanches—in crystalline metals at the micro- and nanoscale. The term 'microplastic' here refers to a materials science concept about deformation behavior, not environmental plastic particles.
Non-universal behavior of intermittent flow in microplasticity
Microcompression experiments on single-crystal metals revealed that dislocation avalanche behavior during plastic deformation is not universal as some theories predicted, but instead depends significantly on crystal structure, loading orientation, and drive rate. The power-law scaling exponents varied across conditions, spanning values predicted by competing theoretical models.
Shear-band cavitation determines the shape of the stress-strain curve of metallic glasses
Researchers used X-ray tomography to reveal how shear-band cavitation governs the post-yield stress-strain behavior of metallic glasses, finding that macroscopic strain softening coincides with the first appearance of internal shear-band cavities and that cavity growth follows a power law with a fractal dimension consistent with self-similar fracture surface properties. These findings demonstrate that internal microcracking dynamics underlie the large variability in post-yielding flow stress and failure strain observed in metallic glasses.
Severe Plastic Deformation of Amorphous Alloys
This materials science paper examines how high-pressure torsion affects the structure and properties of metallic glass alloys. The research is not related to microplastics or environmental health.
Intermittent microplasticity in the presence of a complex microstructure
Researchers investigated intermittent microplasticity -- the jerky, avalanche-like nature of plastic deformation at small scales -- in Al-Cu binary alloys with varying microstructural complexity, demonstrating a gradual transition from scale-free power-law statistics to scale-dependent exponential distributions as incoherent precipitates are introduced, with non-Gaussian dislocation interactions persisting across different microstructures.
Microplasticity Detected by an Acoustic Technique
This materials science paper describes an acoustic technique that detects microplastic deformation events — tiny slip occurrences within metal crystals during loading — by monitoring longitudinal oscillations. 'Microplasticity' here refers to microscale plastic deformation in crystalline materials and is unrelated to environmental plastic pollution.
Rejuvenation engineering in metallic glasses by complementary stress and structure modulation
Researchers used X-ray diffraction to study how stress and structural rejuvenation affect the mechanical properties of metallic glasses at a microscale. While focused on materials science, understanding plastic deformation in amorphous metals contributes to developing more durable engineered materials.
Structural changes in a metallic glass under cyclic indentation
Researchers used computer simulations to study how a metallic glass material — a disordered metal alloy — changes at the atomic level when repeatedly pressed with an indenter, finding that the material initially relaxes structurally but then gradually rebuilds its original structure, explaining the known phenomenon of metals getting harder with repeated deformation cycles.
Quasi-periodic events in crystal plasticity and the self-organized avalanche oscillator
Researchers experimentally compressed nickel microcrystals across three orders of magnitude in strain rate and discovered that at low rates, plastic deformation bursts become quasi-periodic rather than random, revealing a "self-organized avalanche oscillator" behavior predicted to occur wherever slow relaxation competes with sudden stress release.
Physical scaling laws in dislocation microstructures and avalanches from dislocation dynamics simulations
Researchers performed extensive 3D Dislocation Dynamics simulations of FCC copper deformation across three orders of magnitude in dislocation density to resolve inconsistencies in reported power law scaling exponents for plastic avalanches in crystalline materials. They found that the power law exponent (approximately -1.6 to -1.7) is invariant to dislocation density and loading direction, with cutoff parameters scaling predictably with dislocation density.
Variety of scaling behaviors in nanocrystalline plasticity
This is a materials science study examining the variety of scaling behaviors observed in nanocrystalline plasticity, exploring how grain size affects deformation mechanisms in metals. It is not related to environmental microplastics.
Scaling in the Local Strain-Rate Field during Jerky Flow in an Al-3%Mg Alloy
This physics paper investigates microscale deformation patterns and scale invariance in aluminum alloy plasticity. It is a materials science study with no relevance to environmental microplastics or human health.
Independence of Slip Velocities on Applied Stress in Small Crystals
This physics study examined the velocities at which crystal slip events occur during plastic deformation of tiny metal crystals, finding they are independent of applied stress over a wide range. This is a condensed matter physics study on metal deformation with no relevance to environmental microplastics.
Correlation versus randomization of jerky flow in an AlMgScZr alloy using acoustic emission
This physics study analyzed the spatiotemporal patterns of jerky plastic deformation in an aluminum alloy, finding complex correlated and random behaviors in dislocation dynamics. It is a materials science paper unrelated to environmental microplastics.
Atomistic mechanisms of cyclic hardening in metallic glass
This materials science paper investigated atomic-level mechanisms by which metallic glass strengthens under cyclic mechanical loading, using computer simulations to study how structural changes accumulate. This is a condensed matter physics study with no relevance to environmental microplastics.
Microstructural signatures of dislocation avalanches in a high-entropy alloy
This materials physics study traced how individual atomic slip events (dislocation avalanches) produce visible slip lines in a high-entropy alloy under stress. The term 'microplastic events' here refers to a materials science concept about small-scale deformation, not environmental plastic particles.
Role of Densification in Deformation of Glasses Under Point Loading
This materials science paper proposes that so-called 'microplastic effects' in glass under point loading are caused by densification rather than conventional plastic flow. The research focuses on glass mechanics and hardness, using 'microplastic' in an engineering context with no relation to environmental plastic pollution.