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|Title:||Micromechanisms of Deformation and Fracture in Porous L-PBF 316l Stainless Steel at Different Strain Rates|
|Citation:||Micromechanisms of Deformation and Fracture in Porous L-PBF 316l Stainless Steel at Different Strain Rates / N. Kazantseva, P. Krakhmalev, M. Åsberg et al. // Metals. — 2021. — Vol. 11. — Iss. 11. — 1870.|
|Abstract:||The process of an unstable plastic flow associated with the strain rate sensitivity of mechanical properties was studied in porous 316L austenitic steel samples manufactured by laser powder bed fusion (L-PBF). Different micromechanisms of deformation and fracture of porous samples dependent on strain rate were found. It was found that despite the porosity, the specimens showed high strength, which increased with the loading rate. Porosity led to lower ductility of the studied specimens, in comparison with literature data for low porous 316L L-PBF samples and resulted in de-localization of plastic deformation. With an increase in strain rate, nucleation of new pores was less pronounced, so that at the highest strain rate of 8 × 10-3s-1, only pore coalescence was ob-served as the dominating microscopic mechanism of ductile fracture. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.|
POWDER BED FUSION
|metadata.dc.description.sponsorship:||Funding: This work was founded by the Swedish Agency for Economic and Regional Growth, grant № 20201144 and Russian State program of Institute of Metal Physics “Additivity” № 121102900049-1.|
|Appears in Collections:||Научные публикации, проиндексированные в SCOPUS и WoS CC|
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