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Updated: Feb 28, 2026

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Machining of Fe-Based Amorphous Alloy Ribbons with Sub-50 Femtosecond Laser Pulses.

Tamas Somoskoi1,2, Miklós Füle2,3, Peter Gaal1

  • 1Department of Optics and Quantum Electronics, University of Szeged, Dóm tér 9, H-6720 Szeged, Hungary.

Micromachines
|February 27, 2026
PubMed
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Femtosecond laser pulses enable precise cutting of brittle iron-based metallic glasses. This advanced technique minimizes material modification, overcoming challenges in machining these high-performance soft magnetic materials.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Laser Physics

Background:

  • Fe-based metallic glasses possess excellent soft magnetic properties, making them suitable for transformer cores.
  • Their mechanical brittleness and low thermal conductivity hinder conventional machining processes.

Purpose of the Study:

  • To investigate the feasibility of using sub-50 fs laser pulses for precision machining of Fe-based metallic glass ribbons.
  • To analyze the localized modifications at the cut edge and compare them with crystalline metals.

Main Methods:

  • Cutting of Fe91-Si4.5-C4.0-Al0.5 amorphous alloy ribbons using sub-50 femtosecond laser pulses.
  • Systematic analysis of morphological and chemical composition changes at the machined edges.
  • Comparison of laser-machined edges with those of crystalline metals.
Keywords:
Fe-based amorphous alloysfemtosecond laserheat affected zonelaser ablationlaser cutting

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Main Results:

  • Femtosecond laser machining resulted in minimal detectable modifications, confined to an 80 μm wide region at the cut edge.
  • The extent of material modification was significantly less compared to continuous laser machining methods.
  • Preservation of the amorphous structure and magnetic properties in the vicinity of the cut was observed.

Conclusions:

  • Sub-50 fs laser pulse machining is a highly effective method for overcoming the fine machining difficulties associated with brittle metallic glasses.
  • This technique offers a promising solution for fabricating components from advanced soft magnetic materials without compromising their properties.