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61,005 resultsShowing papers similar to Shear-band cavitation determines the shape of the stress-strain curve of metallic glasses
ClearMetallic 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.
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.
Rejuvenation engineering in metallic glasses by complementary stress and structure modulation
Researchers used X-ray diffraction, microscopy, and computer simulations to study how metallic glasses — disordered metal alloys with potential structural uses — behave under compression, finding that combining stress and structural changes together enhances ductility more than either alone. The work provides a roadmap for designing stronger, tougher metallic glass materials by engineering complementary stress and microstructural effects.
Strain-dependent evolution of avalanche dynamics in bulk metallic glass
Researchers used in situ acoustic emission techniques to study avalanche dynamics during deformation of a bulk metallic glass (BMG) from the microplastic deformation region through to failure. Avalanche events followed a power-law distribution with exponents decreasing from 1.61 to 1.49 as deformation increased, demonstrating strain-dependent evolution of scale-invariant plasticity behavior in amorphous solids.
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.
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.
Viscosity 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.
Incipient Bulk Polycrystal Plasticity Observed by Synchrotron In-Situ Topotomography
This materials science study used synchrotron X-ray imaging to observe the early stages of plastic deformation in a metal alloy at the grain scale. It is focused on materials plasticity — the physical deformation of metals — not environmental plastic pollution.
Quantifying yield behaviour in metals by X-ray nanotomography
Researchers combined X-ray nano-imaging with digital tracking to map how materials deform beneath a tiny indenter in 3D, successfully measuring the plastic (permanent deformation) properties of a special nuclear-grade steel — offering a new method to test materials in situations where only the surface can be exposed to radiation for testing.
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.
Atomic cluster dynamics causes intermittent aging of metallic glasses
Researchers used computer simulations to investigate why metallic glasses age in an intermittent, stop-and-start pattern rather than gradually slowing down over time. They found that this behavior is driven by sudden collective rearrangements of small clusters of atoms within the material. The study provides new insights into the fundamental physics of how glassy materials change their structure over time.