Abstract
Particles of AISI 304L stainless steel powder were spheroidized by the induction plasma spheroidization process (TekSphero-15 spheroidization system) to assess the effects of the spheroidization process on powder and part properties. The morphology of both as-received and spheroidized powders was characterized by measuring particle size and shape distribution. The chemistry of powders was studied using inductively coupled plasma optical emission spectroscopy for evaluation of composing elements, and the powder’s microstructure was assessed by X-ray diffraction for phase identification and by electron backscattered diffraction patterns for crystallography characterization. The Revolution Powder Analyzer was used to quantify powder flowability. The mechanical properties of parts fabricated with as-received and spheroidized powders using laser powder bed fusion process were measured and compared. Our experimental results showed that the fabricated parts with plasma spheroidized powder have lower tensile strength but higher ductility. Considerable changes in powder chemistry and microstructure were observed due to the change in solidification mode after the spheroidization process. The spheroidized powder solidified in the austenite-to-ferrite solidification mode due to the loss of carbon, nitrogen, and oxygen. In contrast, the as-received powder solidified in the ferrite-to-austenite solidification mode. This change in solidification mode impacted the components made with spheroidized powder to have lower tensile strength but higher ductility
Recommended Citation
Sehhat MH, Sutton AT, Hung CH, et al., 2022, Plasma spheroidization of gas-atomized 304L stainless steel powder for laser powder bed fusion process. Mater Sci Add Manuf, 1(1): 1. https://doi.org/10.18063/msam.v1i1.1
Department(s)
Materials Science and Engineering
Second Department
Mechanical and Aerospace Engineering
Publication Status
Open Access
Keywords and Phrases
Powder characteristics; Mechanical properties; Plasma spheroidization; Laser powder bed fusion; Additive manufacturing; 304L stainless steel
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 AccScience Publishing, All Rights Reserved
Publication Date
February, 2022
Included in
Aerospace Engineering Commons, Materials Science and Engineering Commons, Mechanical Engineering Commons
