Strengthening of 304L Stainless Steel by Addition of Yttrium Oxide and Grain Refinement during Selective Laser Melting

dc.creatorGhayoor, Milad
dc.creatorMirzababaei, Saereh
dc.creatorLee, Kijoon
dc.creatorHe, Yujuan
dc.creatorChang, Chih-hung
dc.creatorPaul, Brian K.
dc.creatorPasebani, Somayeh
dc.date.accessioned2021-11-18T02:17:49Z
dc.date.available2021-11-18T02:17:49Z
dc.date.issued2019
dc.description.abstractThis study investigates the role of submicron yttrium oxide on the microstructural evolution and mechanical properties of selective laser melted 304L oxide dispersion strengthening (ODS) nanocomposite. 304L SS powder and a mixture of 304L SS powder and yttria nanoparticles were used as two feedstocks for fabricating parts using selective laser melting (SLM) process. Scanning electron microscopy and energy-dispersive X-ray spectroscopy revealed a homogenous distribution of Si-Mn-O nanoparticles in the SLM 304L matrix and Y-Si-O nanoparticles in the SLM 304L ODS alloy. Electron backscatter diffraction images imply that the addition of yttria disrupts the formation of large columnar grains in SLM 304L, resulting in the formation of finer equiaxed grains. The average microhardness values increased from 240 HV in SLM 304L to 305 HV in SLM 304L ODS alloy, due to the combined effects of grain refinement and dispersion hardening.en_US
dc.description.departmentMechanical Engineeringen_US
dc.identifier.urihttps://hdl.handle.net/2152/90411
dc.identifier.urihttp://dx.doi.org/10.26153/tsw/17332
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.subjectselective laser meltingen_US
dc.subjectnanocompositeen_US
dc.subjectoxide dispersion strengthened alloyen_US
dc.subject304L stainless steelen_US
dc.titleStrengthening of 304L Stainless Steel by Addition of Yttrium Oxide and Grain Refinement during Selective Laser Meltingen_US
dc.typeConference paperen_US

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