Open AccessMicrostructure examination of additive manufactured 316L steel
Author(s) -
Kemény Dávid Miklós,
Dávid Pammer,
Dorina Kovács
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/903/1/012030
Subject(s) - microstructure , materials science , direct metal laser sintering , annealing (glass) , sintering , metallurgy , layer (electronics) , composite material
The additive manufacturing (AM) is a new field in research. In our research, the samples were made by direct metal laser sintering (DMLS). During the production of 316L material, the piece was formed layer by layer, so the existing layer was re-heat treated when the new layer was formed. Due to the multiple heat treatment, the post-heat treatment of the product is necessary. Microstructure changes were investigated after two different heat treatments. The first was at 450 °C for 4.5 hours, and the second was at 1100 °C for one hour, followed by annealing in each case. The heat-treated sample at 450 °C showed no significant difference. In contrast, the sample heat-treated at 1100 °C the particles were better separated, and segregation in grain boundary was observed, which showed high phosphorus concentration.