Effect of laser clad repair on the fatigue behaviour of ultra-high strength AISI 4340 steel

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dc.contributor.authorSun, SDen_AU
dc.contributor.authorLiu, Qen_AU
dc.contributor.authorBrandt, Men_AU
dc.contributor.authorLuzin, Ven_AU
dc.contributor.authorCottam, Ren_AU
dc.contributor.authorJanardhana, Men_AU
dc.contributor.authorClark, GAen_AU
dc.date.accessioned2016-10-27T05:18:31Zen_AU
dc.date.available2016-10-27T05:18:31Zen_AU
dc.date.issued2014-06-12en_AU
dc.date.statistics2016-10-27en_AU
dc.description.abstractThe fatigue behaviour of an ultra-high strength steel (>1800 MPa) was evaluated to assess the potential of using laser cladding as a repair tool for such steels in aeronautical structural applications. AISI 4340 and AerMet 100 steel powder were used to clad over a grind-out region in an AISI 4340 steel substrate using a 2.5 kW ND:YAG laser. Post-clad heat treatment (PCHT) was also investigated. Results showed very poor tensile properties and significantly reduced fatigue life of the AISI 4340 as-clad with a very high hardness and brittle fracture in the clad and HAZ zone. Residual stress results showed a compressive residual stress in the clad region and tensile residual stress in the HAZ. Changing the alloy of the clad layer to AerMet 100 steel, as well as applying a PCHT process, showed promising results as the fatigue life was improved from that of the grind-out substrate. © 2014, Elsevier B.V.en_AU
dc.identifier.citationSun, S. D., Liu, Q., Brandt, M., Luzin, V., Cottam, R., Janardhana, M., & Clark, G. (2014). Effect of laser clad repair on the fatigue behaviour of ultra-high strength AISI 4340 steel. Materials Science and Engineering: A, 606, 46-57. doi: http://dx.doi.org/10.1016/j.msea.2014.03.077en_AU
dc.identifier.govdoc7499en_AU
dc.identifier.issn0921-5093en_AU
dc.identifier.journaltitleMaterials Science and Engineering: Aen_AU
dc.identifier.pagination46-57en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.msea.2014.03.077en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/7937en_AU
dc.identifier.volume606en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectFatigueen_AU
dc.subjectStainless steelsen_AU
dc.subjectLasersen_AU
dc.subjectResidual stressesen_AU
dc.subjectCladdingen_AU
dc.subjectTensile propertiesen_AU
dc.titleEffect of laser clad repair on the fatigue behaviour of ultra-high strength AISI 4340 steelen_AU
dc.typeJournal Articleen_AU
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