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Related Concept Videos

Stress-Strain Diagram - Brittle Materials01:24

Stress-Strain Diagram - Brittle Materials

Brittle materials, including glass, cast iron, and stone, exhibit unique characteristics. They fracture without considerable change in their elongation rate, indicating that their breaking and ultimate strength are equivalent. Such materials also show lower strain levels at the point of rupture. The failure in brittle materials predominantly results from normal stresses, as evidenced by the rupture created along a surface perpendicular to the applied load. These materials do not display...
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Related Experiment Video

Updated: Jun 5, 2026

Fluid-cell Raman Spectroscopy for operando Studies of Reaction and Transport Phenomena during Silicate Glass Corrosion
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Published on: May 9, 2025

A damage-tolerant glass.

Marios D Demetriou1, Maximilien E Launey, Glenn Garrett

  • 1Keck Engineering Laboratories, California Institute of Technology, Pasadena, California 91125, USA. marios@caltech.edu

Nature Materials
|January 11, 2011
PubMed
Summary
This summary is machine-generated.

Metallic glasses, unlike traditional brittle materials, exhibit enhanced toughness. A novel palladium alloy demonstrates superior crack-shielding via shear-banding, achieving toughness comparable to the strongest known materials.

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Area of Science:

  • Materials Science
  • Metallurgy
  • Solid Mechanics

Background:

  • Glassy materials lack microstructure, leading to high strength but brittleness and flaw sensitivity.
  • Conventional glasses fail by brittle fracture, while metallic glasses show limited plasticity through shear-band sliding.
  • Metallic glasses typically exhibit a toughness-strength balance between ceramics and metals.

Purpose of the Study:

  • To introduce a bulk glassy palladium alloy with exceptional mechanical properties.
  • To investigate the crack-shielding mechanisms in this novel amorphous material.
  • To assess the damage tolerance and fracture toughness of the palladium alloy.

Main Methods:

  • Fabrication of a bulk glassy palladium alloy.
  • Mechanical testing to evaluate fracture toughness and strength.
  • Microscopic analysis to observe crack propagation and shear-banding behavior.

Main Results:

  • The palladium alloy demonstrated an unusual capacity for shielding an opening crack.
  • Extensive shear-band sliding accommodated crack growth.
  • Achieved fracture toughness comparable to the toughest known engineering materials.

Conclusions:

  • Amorphous materials can achieve damage tolerance beyond established benchmarks.
  • The developed palladium alloy pushes the limits of toughness and strength in structural metals.
  • This finding broadens the potential applications of metallic glasses in demanding environments.