Case Study of the Tensile Fracture Investigation of Additive Manufactured Austenitic Stainless Steels Treated at Cryogenic Conditions.

作者: Róbert Bidulský , Jana Bidulská , Federico Simone Gobber , Tibor Kvačkaj , Patrik Petroušek

DOI: 10.3390/MA13153328

关键词: AusteniteMaterials scienceCryogenic treatmentComposite materialAustenitic stainless steelLiquid gasTensile testingElongationFracture (geology)Ultimate tensile strength

摘要: Additive manufacturing is a key enabling technology in the manufacture of highly complex shapes, having very few geometric limitations compared to traditional processes. The present paper aims at investigating mechanical properties cryogenic temperatures for 316L austenitic stainless steel, due wide possible applications such as liquid gas confinement or superconductors. starting powders have been processed by laser powder bed fusion (LPBF) and tested as-built conditions after stress relieving treatments. Mechanical 298, 77 4.2 K from tensile testing are presented together with fracture surfaces investigated field emission scanning electron microscopy. results show that high strength temperature characteristic all samples, ultimate 1246 MPa 55% maximum total elongation K. This study can constitute solid basis components LPBF specific conditions.

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