Effect of Build Orientation on Residual Stress and Microstructure in Inconel 625 Fabricated via Laser Powder Bed Fusion

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dc.creatorAndurkar, M.
dc.creatorProrok, B.C.
dc.creatorThompson, S.M.
dc.date.accessioned2023-04-05T13:51:10Z
dc.date.available2023-04-05T13:51:10Z
dc.date.issued2022
dc.description.abstractThe reliability of parts produced by Laser Powder Bed Fusion (L-PBF) is still not at a great acceptance level. One of the major defects inherited in parts fabricated from L-PBF is a high level of residual stress. In this study, two build orientations i.e., vertical and diagonal, were used to fabricate Inconel 625 specimens to observe its effects on the residual stress magnitude and grain growth. A novel, Cos-α X-ray diffraction method was used to measure residual stress values along the top surface of the samples. Electron Backscattered Diffraction (EBSD) and kernel average misorientation (KAM) maps were employed to explain residual stress trends and differences between samples. Results indicate that the as-printed vertical sample possessed a higher tensile residual stress (77 ± 15 MPa) compared to the diagonally-printed sample (52 ± 12 MPa). The KAM map of the as-printed vertically oriented sample showed more pronounced local misorientations caused by dislocations compared to the diagonally-printed sample.en_US
dc.description.departmentMechanical Engineeringen_US
dc.identifier.urihttps://hdl.handle.net/2152/117774
dc.identifier.urihttp://dx.doi.org/10.26153/tsw/44653
dc.language.isoengen_US
dc.relation.ispartof2022 International Solid Freeform Fabrication Symposiumen_US
dc.rights.restrictionOpenen_US
dc.subjectSelective Laser Meltingen_US
dc.subjectNickel Superalloyen_US
dc.subjectEBSDen_US
dc.subjectMisorientationen_US
dc.subjectMicrostrainen_US
dc.titleEffect of Build Orientation on Residual Stress and Microstructure in Inconel 625 Fabricated via Laser Powder Bed Fusionen_US
dc.typeConference paperen_US

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2022 International Solid Freeform Fabrication Symposium