LPW releases new AM metal powder atomisation case study

April 27, 2017

LPW Technology Ltd, Runcorn, UK, has published its newest case study, ‘Nitrogen vs Argon Atomisation of 17-4 PH Stainless Steel and their respective Effects on AM Processing’. The study joins the current case studies in the LPW Technical Library, available via the company’s website, along with a number of brochures and technical tools, and looks in-depth at the role of atomisation gas choice in determining the ultimate microstructure and mechanical properties of fabricated parts in Selective Laser Melting (SLM), using 17-4 PH stainless steel metal powder to these effects demonstrate across four total builds.

According to the study, atomising 17-4 PH with argon delivers a powder with the desired martensitic microstructure, whereas nitrogen gas atomisation will deliver an austenitic microstructure. Whether the powder is atomised using argon or nitrogen, subsequent processing of the powder with an argon SLM processing gas will still deliver a martensitic part that can be heat treated to produce enhanced mechanical properties.

However, using argon for both atomisation and processing will deliver optimum hardness, ultimate tensile strength and yield strength values, reports LPW. Using nitrogen for both processes will result in an austenitic microstructure with no observed increase in desired mechanical properties.

“It’s important to understand the effect that powder production methods and AM processing parameters can have on the resulting component microstructure,” stated Dr Rob Deffley, LPW’s Research & Development Manager. “LPW’s highly-trained team understands the behaviour of powders processed under different conditions and can recommend the appropriate powder to achieve the required mechanical properties. This latest case study addresses a question we have been asked by several AM end users and adds further intelligence to our portfolio of technical information.”

www.lpwtechnology.com

Download the latest issue of Metal AM magazine

Our latest issue is now available to view online or download in PDF format.

As well as an extensive AM industry news section, this 176-page issue includes articles and reports on:

  • Innovation and differentiation: Precious metal Additive Manufacturing in the jewellery sector
  • Unrealised potential: The story and status of Electron Beam Powder Bed Fusion
  • Freemelt AB: Open source technology to explore the potential of Electron Beam Powder Bed Fusion
  • In pursuit of perfection: A case study on how Bugatti and APWORKS leverage the full potential of AM
  • Facing obstacles to profitability in metal AM: An Operational Excellence perspective
  • Mass-production using PBF-LB: How laser beam measurements can help pave the way
  • Link3D’s ‘Additive Manufacturing Maturity Model’: Developing an agile and resilient supply chain
  • Design for Additive Manufacturing (DfAM): Binder Jetting Technology demystified
  • > More information

Latest news

    E-newsletter

    Sign up to our e-newsletter, sent weekly to AM professionals and end-users around the world. We'll also let you know each time a new issue of Metal AM magazine is available.

    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 in PDF format, in either single page format or as double-page “spreads” for viewing on large monitors. All downloads are free of charge. Go to archive...

    Connect with us

    Visit our social media channels and sign up to our e-newsletter

    Copy link
    Powered by Social Snap