Journal
MATERIALS LETTERS
Volume 235, Issue -, Pages 1-5Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2018.09.152
Keywords
Selective laser melting; 316L stainless steel; Anisotropy; Microstructure; Deformation and fracture
Funding
- National Key Research and Development Program of China [2017YFB 0702300]
- Fundamental Research Funds for the Central Universities [FRF-TP-17-002B]
- Shanghai Materials Genome Institute [5, 16DZ2260605]
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Microstructural anisotropy widely exists in the additive manufactured components during the rapid solidification process, slender columnar grains were formed along the building direction due to the higher thermal gradient caused by the previously deposited layer heat sink. The resistance to deformation along the x-axis or y-axis was confirmed to be larger than that of the z-axis both for the bulk and porous selective laser melted 316L, which was attributed to that most of the grain boundaries were perpendicular to the loading direction for the first two axes. However, the anisotropy in the microstructure and mechanical property can be eliminated after recrystallization. (C) 2018 Elsevier B.V. All rights reserved.
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