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Related Experiment Video

Updated: Mar 30, 2026

Processing of Bulk Nanocrystalline Metals at the US Army Research Laboratory
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Imprinting bulk amorphous alloy at room temperature.

Song-Yi Kim1, Eun-Soo Park2, Ryan T Ott3

  • 1Rare Metals R&D Group, Korea Institute of Industrial Technology, Incheon 406-840, Korea.

Scientific Reports
|November 14, 2015
PubMed
Summary

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Rejuvenated Amorphous Alloys: Processing Methods, Microstructures and Mechanical Properties.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026

This study shows bulk amorphous alloys can be patterned at room temperature via cold-plastic forming. This technique precisely imprints features onto metals and other amorphous alloys without heat treatment.

Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Metallurgy

Background:

  • Bulk amorphous alloys (BAAs) are typically brittle, limiting their application in forming processes.
  • Conventional forming methods often require elevated temperatures, risking embrittlement.
  • Understanding the plastic deformation behavior of BAAs is crucial for developing new manufacturing techniques.

Purpose of the Study:

  • To investigate the plastic deformation of a brittle bulk amorphous alloy under uniaxial compression at room temperature.
  • To demonstrate the feasibility of cold-plastic forming for patterning BAAs without thermal energy.
  • To explore the use of patterned BAAs for imprinting features onto other materials.

Main Methods:

  • Uniaxial compressive loading of a Hf-based bulk amorphous alloy at room temperature.

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  • Cold-plastic forming technique to achieve homogenous flow and patterning.
  • Utilizing the patterned BAA as a die for imprinting features onto Cu foil and Zr-based metallic glass.

    • Main Results:

    • Successful patterning of a brittle Hf-based bulk amorphous alloy through controlled homogenous flow at room temperature.
    • Demonstrated precise replication of geometrical features onto Cu foil and Zr-based metallic glass using the patterned BAA as a die.
    • Observed an inconsistency between macroscopic plasticity and deformability in the amorphous alloy.

    Conclusions:

    • Cold-plastic forming offers a viable method for patterning bulk amorphous alloys at room temperature, avoiding thermal-induced embrittlement.
    • Patterned BAAs can serve as effective dies for high-precision imprinting on various materials, including conventional metals and other metallic glasses.
    • This research opens new avenues for the room-temperature forming applications of bulk amorphous alloys, enhancing their manufacturability and utility.