Local Thermal Conductivity Mapping of Selective Laser Melted 316L Stainless Steel

dc.creatorSimmons, Jacob
dc.creatorDaeumer, Matthias
dc.creatorAzizi, Arad
dc.date.accessioned2021-11-11T16:36:46Z
dc.date.available2021-11-11T16:36:46Z
dc.date.issued2018
dc.description.abstractThe variation in thermal conductivity of 316L stainless steel samples produced with selective laser melting with a varying process parameters is investigated in the bulk and in the microscale. A critical scan rate was observed, while holding all other process parameters constant, above which the porosity started to rapidly increase. For the lowest-porosity sample, a local thermal conductivity map was produced using frequency-domain thermoreflectance. The local stainless steel thermal conductivity varied between 10.4 and 19.8 W/m-K. The average thermal conductivity of the thermal conductivity map agrees within measurement uncertainty with flash diffusivity measurements. The reduction in thermal conductivity with increasing scan rate is not fully explained by the porosity. The average measured values are less than conventionally produced bulk 316L due to the unique processing conditions of laser powder bed fusion, which modifies the crystallographic texture and microstructure.en_US
dc.description.departmentMechanical Engineeringen_US
dc.identifier.urihttps://hdl.handle.net/2152/90240
dc.identifier.urihttp://dx.doi.org/10.26153/tsw/17161
dc.language.isoengen_US
dc.publisherUniversity of Texas at Austinen_US
dc.relation.ispartof2018 International Solid Freeform Fabrication Symposiumen_US
dc.rights.restrictionOpenen_US
dc.subjectlaser powder-bed fusionen_US
dc.subjectadditive manufacturingen_US
dc.subjectthermal conductivityen_US
dc.subjectthermal transporten_US
dc.subjectstainless steelen_US
dc.subject316Len_US
dc.subjectmetal 3D printingen_US
dc.titleLocal Thermal Conductivity Mapping of Selective Laser Melted 316L Stainless Steelen_US
dc.typeConference paperen_US

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