Effects of Gas Nitriding on Fatigue and Crack Initiation of Ti6Al4V produced by Selective Laser Melting

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dc.contributor.authorMukhtar, Aamiren_NZ
dc.contributor.authorFry, Mikeen_NZ
dc.contributor.authorJackson, Benjamin Ivanen_NZ
dc.contributor.authorBolzoni, Leandroen_NZ
dc.date.accessioned2019-10-23T20:37:55Z
dc.date.available2019-01-01en_NZ
dc.date.available2019-10-23T20:37:55Z
dc.date.issued2019en_NZ
dc.description.abstractSelective laser melting (SLM) is an additive manufacturing technique which permits fabrication of three dimensional parts by selectively melting consecutive layers of metallic powder. This allows the production of parts with high geometrical complexity. Titanium alloy Ti-6Al-4V (Ti64) is widely used in industry due to its high strength-to-mass ratio, corrosion resistance and biocompatibility. SLM increases the application range of Ti64 because of its flexibility for prototyping any part and its low material waste. Nitriding is a diffusion-based thermo-chemical treatment for interstitial hardening of the surface of Ti64 alloy products. This study characterized the fatigue behaviour of SLM-produced Ti64 nitrided and annealed bars in as-built and machined surface conditions. The surface of the SLM-produced Ti64 parts after gas nitriding showed high values of micro-hardness up to 550 HV just below the surface. Fatigue testing was performed to assess the materials fatigue strength and fractographic imaging was used to examine fracture surface and nitride layer characteristics. Nitriding was found to reduce the fatigue strength of the samples to a similar level irrespective of being in the as-built or machined condition. The effect of nitriding on crack initiation and growth at various stress levels under fatigue loading was investigated.
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dc.identifier.citationMukhtar, A., Fry, M., Jackson, B., & Bolzoni, L. (2019). Effects of Gas Nitriding on Fatigue and Crack Initiation of Ti6Al4V produced by Selective Laser Melting. In Materials Research Ibero-american Journal of Materials (Vol. 22). Universidade Federal de São Carlos, Departamento de Engenharia de Materiais. https://doi.org/10.1590/1980-5373-MR-2018-0766en
dc.identifier.doi10.1590/1980-5373-MR-2018-0766en_NZ
dc.identifier.eissn1980-5373en_NZ
dc.identifier.issn1516-1439en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/13020
dc.language.isoen
dc.publisherUniversidade Federal de São Carlos, Departamento de Engenharia de Materiaisen_NZ
dc.relation.isPartOfMaterials Research Ibero-american Journal of Materialsen_NZ
dc.rightsThis is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
dc.subjectScience & Technologyen_NZ
dc.subjectTechnologyen_NZ
dc.subjectMaterials Science, Multidisciplinaryen_NZ
dc.subjectMaterials Scienceen_NZ
dc.subjectSelective laser meltingen_NZ
dc.subjectTitaniumen_NZ
dc.subjectFatigueen_NZ
dc.subjectGas nitridingen_NZ
dc.subjectCrack initiationen_NZ
dc.subjectADDITIVELY MANUFACTURED TI-6AL-4Ven_NZ
dc.subjectMECHANICAL-BEHAVIORen_NZ
dc.subjectTITANIUMen_NZ
dc.subjectMICROSTRUCTUREen_NZ
dc.subjectPERFORMANCEen_NZ
dc.subjectELECTRONen_NZ
dc.subjectPOWDERen_NZ
dc.titleEffects of Gas Nitriding on Fatigue and Crack Initiation of Ti6Al4V produced by Selective Laser Meltingen_NZ
dc.typeConference Contribution
pubs.elements-id231135
pubs.organisational-group/Waikato
pubs.organisational-group/Waikato/2024 PBRF
pubs.organisational-group/Waikato/DHECS
pubs.organisational-group/Waikato/DHECS/2024 PBRF - DHEC
pubs.organisational-group/Waikato/DHECS/SENG
pubs.organisational-group/Waikato/DHECS/SENG/2024 PBRF - SENG
pubs.owner.emailleandro@waikato.ac.nz
pubs.owner.nameBolzoni, Leandro
pubs.publication-statusPublisheden_NZ
pubs.user.infoBolzoni, Leandro (leandro@waikato.ac.nz)
pubs.volume22en_NZ
uow.verification.statusqueried
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