Introducing gradient severe shot peening as a novel mechanical surface treatment

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dc.authoridGUAGLIANO, MARIO/0000-0003-1958-3974
dc.authoridbagherifard, sara/0000-0002-5757-2785
dc.authoridMaleki, Erfan/0000-0002-5995-1869
dc.contributor.authorMaleki, Erfan
dc.contributor.authorBagherifard, Sara
dc.contributor.authorUnal, Okan
dc.contributor.authorBandini, Michele
dc.contributor.authorFarrahi, Gholam Hossein
dc.contributor.authorGuagliano, Mario
dc.date.accessioned2024-09-29T16:01:02Z
dc.date.available2024-09-29T16:01:02Z
dc.date.issued2021
dc.departmentKarabük Üniversitesien_US
dc.description.abstractShot peening is widely used for improving mechanical properties especially fatigue behavior of metallic components by inducing surface hardening, compressive residual stresses and surface grain refinement. In air blast shot peening, projection pressure and surface coverage (an index of peening duration) have been considered as major controlling process parameters; the combination of these parameters plays a critical role in the beneficial effects of shot peening. Generally in severe shot peening aimed at obtaining surface grain refinement, constant values of pressure are considered with different peening durations. Considering very high peening duration, however, the phenomenon of over shot peening, which can be identified with the formation of surface defects could occur. The present study introduces a novel shot peening treatment, here called gradient severe shot peening (GSSP) that instead of using constant projection pressure, implements gradually increasing or decreasing pressures. The gradual increase of the projection pressure acts as a pre-hardening stage for the following higher projection pressure boosting the potential of the material to tolerate the sequential impacts and thus become less prone to the formation of surface defects. The results of the experiments indicate significant fatigue life improvement obtained for GSSP treated specimens compared to the standard treatment with constant pressure. GSSP avoids the detrimental effects of over-peening, while maintaining the beneficial effects of surface nano-crystallization, surface hardening and compressive residual stresses. The notable difference in fatigue strength enhancement for GSSP treated material can be also attributed to the modulated surface morphology with lower surface roughness compared to a standard shot peening treatment with the same exposure time.en_US
dc.identifier.doi10.1038/s41598-021-01152-2
dc.identifier.issn2045-2322
dc.identifier.issue1en_US
dc.identifier.pmid34764327en_US
dc.identifier.scopus2-s2.0-85118941181en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1038/s41598-021-01152-2
dc.identifier.urihttps://hdl.handle.net/20.500.14619/5499
dc.identifier.volume11en_US
dc.identifier.wosWOS:000717747400076en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.publisherNature Portfolioen_US
dc.relation.ispartofScientific Reportsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectFatigue Behavioren_US
dc.subjectResidual-Stressen_US
dc.subjectNanocrystallizationen_US
dc.subjectSteelen_US
dc.titleIntroducing gradient severe shot peening as a novel mechanical surface treatmenten_US
dc.typeArticleen_US

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