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Related Concept Videos

Metallic Solids02:37

Metallic Solids

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Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
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The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
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The quantity that describes the deformation of a body under stress is known as strain. Strain is given as a fractional change in either length, volume, or geometry under tensile, volume (also known as bulk), or shear stress, respectively, and is a dimensionless quantity. The strain experienced by a body under tensile or compressive stress is called tensile or compressive strain, respectively. In contrast, the strain experienced under bulk stress and shear stress is known as volume and shear...
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Updated: Mar 10, 2026

Optimized Sealing Process and Real-Time Monitoring of Glass-to-Metal Seal Structures
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Universal structural parameter to quantitatively predict metallic glass properties.

Jun Ding1,2, Yong-Qiang Cheng3, Howard Sheng4

  • 1Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.

Nature Communications
|December 13, 2016
PubMed
Summary
This summary is machine-generated.

Researchers developed "flexibility volume," a new metric for metallic glasses (MGs). This indicator links atomic structure to physical properties, predicting shear modulus and relaxation behavior in MGs.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Amorphous Materials

Background:

  • Correlating amorphous structure with physical properties in metallic glasses (MGs) is a key challenge.
  • Understanding atomic-level structure-property relationships is crucial for designing advanced materials.

Purpose of the Study:

  • To introduce a universal indicator, 'flexibility volume,' to bridge the structural state of MGs with their properties.
  • To quantitatively predict key physical properties of MGs using this new parameter.

Main Methods:

  • Combining static atomic volume with dynamics information from atomic vibrations.
  • Probing local configurational space and interatomic interactions.
  • Analyzing atomic packing topology and relaxation mechanisms.

Main Results:

  • Flexibility volume quantitatively predicts the shear modulus of MGs.
  • The parameter shows strong correlations with atomic packing topology.
  • It also correlates with activation energy for relaxation and shear transformation propensity.

Conclusions:

  • Flexibility volume serves as a universal indicator for metallic glasses.
  • This parameter offers a robust link between structure and properties across diverse MG compositions and conditions.
  • It provides a powerful tool for understanding and predicting MG behavior.