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Designing Laves phases in compositionally complex alloys (CCAs) can enhance high-temperature mechanical properties. This study introduces a new Laves phase-reinforced CCA with superior strength and workability.

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Area of Science:

  • Materials Science
  • Metallurgy
  • Mechanical Engineering

Background:

  • Topologically close-packed (TCP) phases, like Laves phases, are typically detrimental to superalloy mechanical properties.
  • Compositionally complex alloys (CCAs) offer potential for novel microstructural engineering.

Purpose of the Study:

  • To propose and validate a design strategy for leveraging Laves phases in wrought CCAs.
  • To develop a new Laves phase-reinforced CCA with improved high-temperature performance.

Main Methods:

  • Literature review of Laves phase effects in steels.
  • Development of a design strategy for Laves phase optimization in CCAs.
  • Experimental and theoretical investigation of a newly designed Laves phase-reinforced CCA.

Main Results:

  • A novel Laves phase-reinforced CCA was successfully designed and produced.
  • The new CCA exhibits fine-grained microstructures and lower density.
  • Demonstrated superior elevated-temperature mechanical strength while maintaining workability.

Conclusions:

  • Optimized Laves phase fractions and sizes can significantly enhance CCA properties.
  • The developed CCA shows promise compared to existing wrought alloys and Ni-based superalloys.
  • This strategy opens new avenues for high-temperature alloy design.