Microstructures and mechanical properties of selective laser-melted metals with different processed powder

Naoyuki Nomura, Keiko Kikuchi, Akira Kawasaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The Co-33Cr-5Mo alloy powders containing nitrogen were prepared by gas atomization and water-atomization process, and selective laser melting process was performed using both the powders. Nitrogen content in the Co-Cr-Mo powders, which control the phase constitution of Co-Cr-Mo alloys, were almost the same. On the other hand, the oxygen content of the water-atomized powders were higher than that of the gas-atomized powders. SEM observation revealed that the oxide layer containing Cr and Si was formed on the surface, although the clean surface was observed for the gas-atomized powder. It should be noted that the porosity of the PBFL build using the gas-atomized powder was higher than that using the water-atomized powder, especially in the case of lower energy density. The porosity difference caused the mechanical properties difference at the lower energy density.

Original languageEnglish
Title of host publicationWorld PM 2016 Congress and Exhibition
PublisherEuropean Powder Metallurgy Association (EPMA)
ISBN (Electronic)9781899072484
Publication statusPublished - 2016 Jan 1
EventWorld Powder Metallurgy 2016 Congress and Exhibition, World PM 2016 - Hamburg, Germany
Duration: 2016 Oct 92016 Oct 13

Publication series

NameWorld PM 2016 Congress and Exhibition

Other

OtherWorld Powder Metallurgy 2016 Congress and Exhibition, World PM 2016
CountryGermany
CityHamburg
Period16/10/916/10/13

ASJC Scopus subject areas

  • Mechanical Engineering
  • Metals and Alloys

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    Nomura, N., Kikuchi, K., & Kawasaki, A. (2016). Microstructures and mechanical properties of selective laser-melted metals with different processed powder. In World PM 2016 Congress and Exhibition (World PM 2016 Congress and Exhibition). European Powder Metallurgy Association (EPMA).