EFFECTIVENESS OF EX-SITU HEAT TREATMENT OF L-PBF AM 17-4PH STAINLESS STEEL SPECIMENS INTENTIONALLY EXPOSED TO DIFFERENT AS-BUILT THERMAL HISTORIES

dc.creatorHasbrouck, C.R.
dc.creatorBartolai, Joseph
dc.creatorPagan, Darren C.
dc.creatorMiller, Simon W.
dc.date.accessioned2024-03-25T23:43:51Z
dc.date.available2024-03-25T23:43:51Z
dc.date.issued2023
dc.description.abstractThe presented research demonstrates the effectiveness of H900 heat treatment in eliminating microstructural and mechanical property differences between additively manufactured 17-4PH stainless steel samples of varying thermal histories. For this effort, 17-4PH stainless steel was manufactured using laser-based powder bed fusion on an EOS M280 machine in two geometries: ASTM Standard E8 subsize rectangular tensile specimen geometry with thicknesses of 2mm and 6mm. Thermal histories were manipulated by adding secondary laser passes on each layer at varying levels of reduced power. All samples were heat treated after the build following H900 procedures. Mechanical performance was evaluated with uniaxial quasi-static tensile testing and Vickers microhardness measurements. Metallography was examined qualitatively with optical and electron microscopy as well as quantitatively through electron backscatter diffraction. No statistically significant mechanical property or microstructural differences were discovered, suggesting a successful ex-situ heat treatment.
dc.description.departmentMechanical Engineering
dc.identifier.urihttps://hdl.handle.net/2152/124342
dc.identifier.urihttps://doi.org/10.26153/tsw/50950
dc.language.isoen_US
dc.publisherUniversity of Texas at Austin
dc.relation.ispartof2023 International Solid Freeform Fabrication Symposium
dc.rights.restrictionOpen
dc.subjectlaser powder bed fusion
dc.subject17-4PH stainless steel
dc.subjectthermal history
dc.subjectheat treatment
dc.titleEFFECTIVENESS OF EX-SITU HEAT TREATMENT OF L-PBF AM 17-4PH STAINLESS STEEL SPECIMENS INTENTIONALLY EXPOSED TO DIFFERENT AS-BUILT THERMAL HISTORIES
dc.typeConference paper

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