Characterization Of The Virgin And Re-cycled Nickel Alloy HX Powder Used For Selective Laser Melting
Paper in proceedings, 2016

Taking to account high specific surface area of the powder, its surface state becomes one of the most important aspects of usability of the powder in PM process and particularly in additive manufacturing. Powder surface characterization of the two HX Ni-based superalloy powders sampled during selective laser melting – namely virgin and re-cycled powders was performed by means of XPS and high-resolution SEM combined with EDX. Results showed slight difference in surface chemical composition between the powders. The most sensitive to oxidation alloying elements in the powder – Al and Cr – segregate to the surface to form more stable oxides in case of re-cycled powder. Loss of silicon due to sublimation was also detected on the surface of re-cycled powder. Ni, as a base element, was presented in the form of hydroxide on the as-received surface of both investigated powders.

Author

Ruslan Shvab

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Alexander Leicht

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Eduard Hryha

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Lars Nyborg

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Proceedings of Wolrd PM2016 - AM - Powder Recycling and Aging

Subject Categories

Materials Engineering

Metallurgy and Metallic Materials

Areas of Advance

Production

Materials Science

ISBN

978-1-899072-47-7

More information

Created

10/7/2017