Microstructure and Mechanical Properties of Additively Manufactured Haynes 230: A Comparative Study of L-PBF vs. LP-DED

dc.creatorMuhammad, Muztahid
dc.creatorGusain, Rukesh
dc.creatorGhiaasiaan, Seyed R.
dc.creatorGradl, Paul R.
dc.creatorShao, Shuai
dc.creatorShamsaei, Nima
dc.date.accessioned2023-01-25T18:22:33Z
dc.date.available2023-01-25T18:22:33Z
dc.date.issued2022
dc.description.abstractThis study investigates the microstructure and room temperature mechanical properties of Haynes 230 fabricated via laser powder bed fusion (L-PBF) and laser powder directed energy deposition (LP-DED). Both L-PBF and LP-DED specimens underwent similar multiple-step heat treatments (HT): stress-relieving (1066°C for 1.5 hours), followed by hot isostatic pressing (at 1163°C and 103 MPa for 3 hours), and solution annealing (1177°C for 3 hours). Microstructural analysis was conducted employing a scanning electron microscope. Uniaxial tensile tests at room temperature were conducted to evaluate the mechanical properties. The change in microstructures after HT and tensile results for both L-PBF and LP-DED specimens were comparable. Upon HTs, the micro-segregation and dendritic microstructure observed in non-heat treated conditions were almost fully dissolved, and carbide phases (M6C/M23C6) formed within grain interiors and grain boundaries in both L-PBF and LP-DED specimens. Finally, the failure mechanisms under tensile load have been studied and compared by fractography.en_US
dc.description.departmentMechanical Engineeringen_US
dc.identifier.urihttps://hdl.handle.net/2152/117293
dc.identifier.urihttp://dx.doi.org/10.26153/tsw/44174
dc.language.isoengen_US
dc.relation.ispartof2022 International Solid Freeform Fabrication Symposiumen_US
dc.rights.restrictionOpenen_US
dc.subjectAdditive manufacturingen_US
dc.subjectHaynes 230en_US
dc.subjectlaser powder bed fusionen_US
dc.subjectlaser powder directed energy depositionen_US
dc.subjecttensile propertiesen_US
dc.titleMicrostructure and Mechanical Properties of Additively Manufactured Haynes 230: A Comparative Study of L-PBF vs. LP-DEDen_US
dc.typeConference paperen_US

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