Effect of Powder Chemical Composition on Microstructures and Mechanical Properties of L-PBF Processed 17-4 PH Stainless Steel in the As-Built and Hardened-H900 Conditions

dc.creatorVunnam, S.
dc.creatorDobson, S.
dc.creatorSaboo, A.
dc.creatorFrankel, D.
dc.creatorSudbrack, C.
dc.creatorStarr, T.L.
dc.date.accessioned2021-11-18T00:06:37Z
dc.date.available2021-11-18T00:06:37Z
dc.date.issued2019
dc.description.abstractPost-build heat treatments such as solutionizing and precipitation hardening are recommended for selective laser melting (SLM) processed components to achieve a homogeneous microstructure. In this study, the effect of powder elemental composition on microstructures and mechanical properties of SLM processed 17-4 PH was studied in the as-built and precipitation hardened (H900) condition without prior solutionizing. Microstructural characterization demonstrated that H900 increased martensite phase composition for samples from powder with low chromium to nickel equivalent (Creq/Nieq) value, whereas no significant difference was observed for the samples from powders with high Creq/Nieq value. None of the specimens exhibited austenite reversion and strain hardening behavior in the as-built and H900 conditions. Low Creq/Nieq specimen exhibited higher yield and tensile strengths, and microhardness from H900, which are comparable to H900 wrought sample. However, no significant improvement in total elongation was observed other than uniform elongation for low Creq/Nieq specimen.en_US
dc.description.departmentMechanical Engineeringen_US
dc.identifier.urihttps://hdl.handle.net/2152/90364
dc.identifier.urihttp://dx.doi.org/10.26153/tsw/17285
dc.language.isoengen_US
dc.publisherUniversity of Texas at Austinen_US
dc.relation.ispartof2019 International Solid Freeform Fabrication Symposiumen_US
dc.rights.restrictionOpenen_US
dc.subject17-4 PH stainless steelen_US
dc.subjectselective laser meltingen_US
dc.subjectelectron backscatter diffractionen_US
dc.subjectEBSDen_US
dc.subjectphase compositionen_US
dc.subjectmechanical propertiesen_US
dc.subjectH900 hardeningen_US
dc.titleEffect of Powder Chemical Composition on Microstructures and Mechanical Properties of L-PBF Processed 17-4 PH Stainless Steel in the As-Built and Hardened-H900 Conditionsen_US
dc.typeConference paperen_US

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