Title: Influence of powder particles shape and size on the sintered austenitic stainless steel

Authors: Helena Dębecka; Marek Hebda

Addresses: Faculty of Mechanical Engineering, Institute of Materials Science, Cracow University of Technology, Warszawska 24, 31-155 Kraków, Kraków, Poland ' Faculty of Mechanical Engineering, Institute of Materials Science, Cracow University of Technology, Warszawska 24, 31-155 Kraków, Kraków, Poland

Abstract: Corrosion behaviour and properties of ready parts produced by powder metallurgy depend on their porosity, especially its volume, spread, type (open or closed) and size. Porosity is inversely proportional to sintered material density, and depends on the size and shape of particles, as well as applied compaction pressure (among others). Furthermore, the particle size influences the sintering process itself in addition to the properties of ready-made parts. The results presented here concern the influence of powder shape and size as well as compacting pressure on the porosity, density, surface roughness and corrosion resistance of sintered 316L stainless steel parts. In addition, the effects occurring during the sintering process were analysed. It was observed that the size and shape of particles significantly affect the sintering process. Most importantly, it was observed that applied compaction pressure is the largest factor on the final properties of the samples.

Keywords: powder metallurgy; austenite; stainless steel; 316L; sponge; spherical; porosity; polarisation curves; corrosion; dilatometry; surface roughness.

DOI: 10.1504/IJMPT.2019.096932

International Journal of Materials and Product Technology, 2019 Vol.58 No.1, pp.85 - 101

Accepted: 26 Sep 2018
Published online: 13 Dec 2018 *

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