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A 3D printable alloy designed for extreme environments.

Timothy M Smith1, Christopher A Kantzos2, Nikolai A Zarkevich3

  • 1NASA Glenn Research Center, Cleveland, OH, USA. timothy.m.smith@nasa.gov.

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Researchers developed a new oxide-dispersion-strengthened alloy, GRX-810, using additive manufacturing. This advanced material offers superior strength, creep performance, and oxidation resistance for extreme environments.

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Area of Science:

  • Materials Science
  • Metallurgy
  • Additive Manufacturing

Background:

  • Multiprincipal-element alloys exhibit excellent mechanical and oxidation resistance, crucial for extreme environments.
  • Traditional alloy development often relies on resource-intensive trial-and-error methods.

Purpose of the Study:

  • To develop a novel oxide-dispersion-strengthened NiCoCr-based alloy using a model-driven design approach.
  • To utilize laser-based additive manufacturing for efficient dispersion of nanoscale oxide particles.

Main Methods:

  • Employed a model-driven alloy design strategy.
  • Utilized laser powder bed fusion (a type of additive manufacturing) to create the alloy.
  • Characterized the microstructure to confirm dispersion of nanoscale Y2O3 particles.

Main Results:

  • Successfully dispersed nanoscale Y2O3 particles throughout the GRX-810 alloy microstructure.
  • Achieved a twofold improvement in strength compared to traditional alloys.
  • Demonstrated over 1,000-fold improvement in creep performance at 1,093°C.
  • Showcased a twofold improvement in oxidation resistance at 1,093°C.

Conclusions:

  • Model-driven alloy design combined with additive manufacturing enables the creation of superior materials with reduced resource expenditure.
  • GRX-810 represents a significant advancement in high-performance alloys for demanding applications.
  • This approach accelerates the discovery of revolutionary materials through dispersion strengthening and additive manufacturing.