Open AccessEffect of particle size distribution on the structure and mechanical properties in the process of laser powder bed fusion
Author(s) -
П. А. Кузнецов,
И. В. Шакиров,
A. S. Zukov,
Vitaliy Bobyr,
M. V. Starytsin
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1758/1/012021
Subject(s) - materials science , anisotropy , crystallite , particle size distribution , particle size , grain size , particle (ecology) , composite material , fusion , metallurgy , microstructure , crystallography , chemical engineering , optics , chemistry , linguistics , oceanography , physics , philosophy , geology , engineering
The paper studies effects of particle size distribution on the structure and mechanical properties of monolithic samples obtained by L-PBF. A powder of 321 austenitic stainless steel of one batch was divided into three fractions 0–20, 20–40, and 0–40 μm. It was established that for narrow fractional powder composition, hardness anisotropy is observed that depends on the building direction, whereas for wide fractional powder composition, hardness anisotropy is practically absent. It was found that the particle size composition of AISI 321 steel powder does not fundamentally affect the morphology of the grain structure. Despite the general preferred orientation of the {101} planes, a weak effect of the powder composition on the crystallites orientation is observed.