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From Recycled Machining Waste to Useful Powders for Metal Additive Manufacturing

  • Blake Fullenwider
  • Parnian Kiani
  • Julie M. Schoenung
  • Kaka MaEmail author
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

To fulfill the growing demand for alternative and sustainable feedstock production for metal additive manufacturing, a novel dual-stage ball milling strategy was proposed to effectively convert recycled stainless-steel machining chips to powder with desirable characteristics for metal additive manufacturing. A theoretical analysis was performed to evaluate the impact of ball size on the chips-to-powder evolution and the consequent powder morphology. To verify the viability of using the ball milled powder created from machining chips in metal additive manufacturing, single tracks have been successfully deposited via laser engineered net shaping deposition and compared to the single tracks made from gas atomized powder using identical deposition conditions. The microstructures of these single tracks exhibited adequate adhesion to the substrate, a uniform melt pool geometry, continuity, and minimal splatter. Minimal differences in grain structure were observed between the single tracks made from ball milled powder and those made from gas atomized powder.

Keywords

Metal additive Manufacturing Stainless steel Sustainability Ball milling 

Notes

Acknowledgements

The present work is financially supported by NSF-CBET#1605392.

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Blake Fullenwider
    • 1
  • Parnian Kiani
    • 2
  • Julie M. Schoenung
    • 2
  • Kaka Ma
    • 1
    Email author
  1. 1.Department of Mechanical EngineeringColorado State UniversityFort CollinsUSA
  2. 2.Department of Chemical Engineering and Materials ScienceUniversity of CaliforniaIrvineUSA

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