Characterization of the virgin and recycled nickel alloy hx powder used for selective laser melting
Paper in proceeding, 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.

Virgin and recycled powder

Powder surface characterization

Additive manufacturing

HX Ni-based superalloy powder

Selective laser melting

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

World PM 2016 Congress and Exhibition


9781899072484 (ISBN)

World Powder Metallurgy 2016 Congress and Exhibition, World PM 2016
Hamburg, Germany,

Subject Categories

Manufacturing, Surface and Joining Technology

Materials Chemistry

Other Chemistry Topics

More information

Latest update

1/17/2022