Effects of pre-strain and temperature on impact deformation behaviour of 304L stainless steel

dc.contributor.authorLee, W.S.
dc.contributor.authorLin, C.F.
dc.contributor.authorChen, T.H.
dc.contributor.authorYang, M.C.
dc.date.accessioned2015-04-21T13:50:29Z
dc.date.available2015-04-21T13:50:29Z
dc.date.issued2010
dc.description.abstractPaper presented at the 7th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Turkey, 19-21 July, 2010.en_ZA
dc.description.abstractThis paper employs a compressive split-Hopkinson pressure bar to investigate the impact deformation and fracture behaviour of 304L stainless steel. Annealed 304L stainless steel bars are pre-strained to strains of 0.15 or 0.5 and are machined into cylindrical compression specimens. Impact tests are then performed at strain rates ranging from 2000 to 6000 s-1 at temperatures of 300oC, 500oC and 800oC. The experimental results show that the flow stress increases with increasing pre­ strain and strain mte, but decreases with increasing temperature. Negative and near-zero work hardening rates are found in the specimens pre-strained to 0.5 and then deformed at 300°C and 500oC, respectively. The strain rate sensitivity of the pre­ strained specimens increases with increasing strain rate, but decreases with increasing temperature. The highest strain rate sensitivity is found in the specimen pre-strained to 0.5 and then tested at a temperature of 300°C under a strain rate of 6000 s-1. OM and SEM observations of the fracture surfaces show that the formation of adiabatic shear bands is the dominant fracture mechanism in 304L stainless steel specimens pre-strained to 0.5 and then deformed at temperatures of 300oC or 500oC.
dc.description.librarianksb2015en_ZA
dc.format.extent6 pagesen_ZA
dc.format.mediumPDFen_ZA
dc.identifier.citationLee, WS, Lin, CF, Chen, TH & Yang MC 2010, 'Effects of pre-strain and temperature on impact deformation behaviour of 304L stainless steel', Paper presented to the 7th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Turkey, 19-21 July 2010.en_ZA
dc.identifier.urihttp://hdl.handle.net/2263/44446
dc.language.isoenen_ZA
dc.publisherInternational Conference on Heat Transfer, Fluid Mechanics and Thermodynamicsen_ZA
dc.relation.ispartofHEFAT 2010en_US
dc.rightsUniversity of Pretoriaen_ZA
dc.subjectImpact deformationen_ZA
dc.subjectCompressive split-Hopkinson pressure baren_ZA
dc.subjectAnnealed 304L stainless steelen_ZA
dc.subjectOMen_ZA
dc.subjectScanning electron microscopy (SEM)en_ZA
dc.titleEffects of pre-strain and temperature on impact deformation behaviour of 304L stainless steelen_ZA
dc.typePresentationen_ZA

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