About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Presentation Title |
Additively Manufactured 316L Stainless Steel: Effect of Heat Treatment on Microstructure and Tensile Properties |
Author(s) |
Seungjong Lee, Reza Ghiaasiaan, Shuai Shao, Paul Gradl, Nima Shamsaei |
On-Site Speaker (Planned) |
Seungjong Lee |
Abstract Scope |
The microstructure and tensile properties of 316L stainless steel (SS) fabricated using the laser powder directed energy deposition (LP-DED) after various heat treatment (HT) steps such as stress-relief (SR), solutionizing (SOL), and hot isostatic pressing (HIP) are characterized. Microstructures before and after HTs are analyzed using both optical and scanning electron microscopy (SEM). Both quasi-static uniaxial tensile and hardness tests are performed to measure mechanical properties. The tensile results indicate that the non-heat treated (NHT) condition possesses higher strengths but lower ductility as compared to the other HT conditions (i.e., SR, SOL, HIP, SR+SOL, and SR+HIP). By employing the multi-step HT conditions (i.e., SR+SOL and SR+HIP), no significant changes on tensile properties as compared to the individual single-step HT conditions (i.e., SOL or HIP) are observed. The findings suggest that multi-step HTs are not required for LP-DED 316L SS unless HIP is needed to minimize volumetric defect contents. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |