ORNL researchers demonstrate new class of superalloys for Additive Manufacturing

February 18, 2021

This additively manufactured turbine blade demonstrates the use of the new class of nickel-base superalloys that can withstand extreme heat environments without cracking or losing strength (Courtesy ORNL/US Dept. of Energy)

Researchers at Oak Ridge National Laboratory (ORNL), Oak Ridge, Tennessee, USA, are reported to have demonstrated that a new class of superalloys, made of cobalt and nickel, remains crack-free and defect-resistant in extreme heat, making them conducive for use in metal Additive Manufacturing applications.

The cracking susceptibility of high-performance engineering alloys, including Ni-base superalloys, high strength aluminium alloys and refractory alloys, has represented a major barrier to the use of these alloys for AM components in critical applications.

In a study, researchers processed a new cobalt and nickel class of superalloys and proved that they remained crack-free in both Electron and Laser Beam Powder Bed Fusion (PBF-EB) and (PBF-LB) AM processes.

The superalloy, containing approximately equal parts of Co and Ni along with Al, Cr, Ta and W, is said to possess strengths in excess of 1.1 GPa in as-printed and post-processed forms, with tensile ductilities of greater than 13% at room temperature.

“The challenge has been producing alloys that don’t crack in the heat,” stated ORNL’s Mike Kirka. “These superalloys have the material properties necessary for challenging environments, because they not only successfully withstood the heat, but also retained strength when stretched.”

www.ornl.gov

In the latest issue of Metal AM magazine

Download PDF
 

Extensive AM industry news coverage, as well as the following exclusive deep-dive articles:

  • Transforming access to medical implants with PrinterPrezz
  • Lessons from 2021’s Olympic bike crash
  • Xerox liquid metal AM
  • Additive Manufacturing for oil, gas and maritime
  • Multi-material metal parts by Powder Bed Fusion
  • Findings from Wohlers Report 2022
  • The challenge of grain size: X-ray powder diffraction analysis of parts made by metal AM

The world of metal AM to your inbox

Don't miss any new issue of Metal AM magazine, and get the latest industry news. Sign up to our twice weekly newsletter.

Sign up

News from the industry…

    News from the industry…

    Discover our magazine archive…

    The free to access Metal Additive Manufacturing magazine archive offers unparalleled insight into the world of metal Additive Manufacturing from a commercial and technological perspective through:

    • Reports on visits to leading metal AM part manufacturers and industry suppliers
    • Articles on technology and application trends
    • Information on materials developments
    • Reviews of key technical presentations from the international conference circuit
    • International industry news

    All past issues are available to download as free PDFs or view in your browser.

    Browse the archive

    qweqw

    Looking for AM machines, metal powders or part manufacturing services?

    Discover suppliers of these and more in our comprehensive advertisers’ index and buyer’s guide, available in the back of Metal AM magazine.

    • AM machines
    • Process monitoring & calibration
    • Heat treatment & sintering
    • HIP systems & services
    • Pre- & post-processing technology
    • Powders, powder production and analysis
    • Part manufacturers
    • Consulting, training & market data
    Download PDF
    Share via
    Copy link
    Powered by Social Snap