Cryomilled 17-4 Stainless Steel Powder as Feedstock for Additive Manufacturing

Presentation Date: 
May 29, 2019 12:00 pm to 12:45 pm EDT
The Defense Systems Information Analysis Center (DSIAC)

Join us for a live webinar presentation on "Cryomilled 17-4 Stainless Steel Powder as Feedstock for Additive Manufacturing."

Additive manufacturing (AM) powders supplied by the manufacturer are gas atomized and supplied without post treatment. By including a pre-processing treatment prior to AM, the powder can be modified to improve the mechanical properties of the final build via a reduction in internal powder porosity and grain size refinement.  A pre-processing treatment could also change how the powder behaves during the AM process.  In this study, as-received gas atomized 17-4 SS powder was ball milled in liquid nitrogen (cryomilling) and then used as feedstock for powderbed fusion (PBF) AM.  The effect of powder pre-processing treatment on powder flow and morphology and how changes influence the PBF process and subsequent defect formation in finished parts was examined.  Finished parts were characterized through microcomputed tomography and optical microscopy, while the effect on material characteristics was examined via x-ray diffraction and electron microscopy.

Participate in the webinar via Skype and/or by phone.

To join the webinar by phone:

  • Please dial: +1 (443)-409-5270
  • Enter conference ID: 72757016

ATTENTION: If you are unable to join the webinar via Skype, you can listen to the presentation by phone. The presentation will be published on the web page 15 minutes prior to the scheduled webinar so that you can download it and follow along with the presentation.

Webinar Instructions:

  1. Click on Go to Webinar link below.
  2. Enter a guest name and click Join the meeting.
  3. If you have not yet downloaded the Skype for Business Web App, you will be prompted to do so.
  4. Follow your web browser's instructions for downloading and installing the Skype for Business Web App plug-in.