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http://dx.doi.org/10.1016/j.net.2021.07.041

Mechanical performance of additively manufactured austenitic 316L stainless steel  

Kim, Kyu-Tae (Dongguk University, Dept. of Nuclear and Energy System Engineering)
Publication Information
Nuclear Engineering and Technology / v.54, no.1, 2022 , pp. 244-254 More about this Journal
Abstract
For tensile tests, Vickers hardness tests and microstructure tests, plate-type and box-type specimens of austenitic 316L stainless steels were produced by a conventional machining (CM) process as well as two additive manufacturing processes such as direct metal laser sintering (DMLS) and direct metal tooling (DMT). The specimens were irradiated up to a fast neutron fluence of 3.3 × 109 n/cm2 at a neutron irradiation facility. Mechanical performance of the unirradiated and irradiated specimens were investigated at room temperature and 300 ℃, respectively. The tensile strengths of the DMLS, DMT and CM 316L specimens are in descending order but the elongations are in reverse order, regardless of irradiation and temperature. The ratio of Vickers hardness to ultimate tensile strength was derived to be between 3.21 and 4.01. The additive manufacturing processes exhibit suitable mechanical performance, comparing the tensile strengths and elongations of the conventional machining process.
Keywords
316L stainless steel; Additive manufacturing; Neutron irradiation; Mechanical properties;
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