Investigation into heat treatment and residual stress in laser clad AA7075 powder on AA7075 substrate

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dc.contributor.authorCottam, Ren_AU
dc.contributor.authorLuzin, Ven_AU
dc.contributor.authorLiu, Qen_AU
dc.contributor.authorWong, YCen_AU
dc.contributor.authorWang, Jen_AU
dc.contributor.authorBrandt, Men_AU
dc.date.accessioned2014-11-27T05:34:11Zen_AU
dc.date.available2014-11-27T05:34:11Zen_AU
dc.date.issued2013-06-04en_AU
dc.date.statistics2014-11-27en_AU
dc.description.abstractThe laser cladding of AA7075 powder onto a AA7075 substrate was conducted to evaluate the effect of heat treatment and to measure residual stress between the clad layer and substrate to better understand the effect of laser cladding. The microstructure formed in the clad region was characteristic of a high cooling rate, which is typical for laser cladding. The heat-affected zone (HAZ) showed coarser precipitates when compared with the substrate and was attributed to the heating from the laser. A solution heat treatment followed by aging was employed to restore the strength in the HAZ. Nanohardness traverses of the clad and substrate was performed and it was shown the hardness in the 7075 clad layer was lower than the substrate both pre- and post-heat treatment and was attributed to the vaporization of zinc and magnesium. Neutron diffraction was employed to measure the residual stress both before and after heat treatment. The residual stresses formed in the clad layer were tensile and about 50 MPa in magnitude; heat treatment increased the stress level to approximately 100 MPa. © 2013, Springer.en_AU
dc.identifier.citationCottam, R., Luzin, V., Liu, Q., Wong, Y. C., Wang, J., & Brandt, M. (2013). Investigation into heat treatment and residual stress in laser clad AA7075 powder on AA7075 substrate. Metallography, Microstructure, and Analysis, 2, 205-212. doi:10.1007/s13632-013-0080-xen_AU
dc.identifier.govdoc5451en_AU
dc.identifier.issn2192-9262en_AU
dc.identifier.issn2192-9270en_AU
dc.identifier.journaltitleMetallography, Microstructure, and Analysisen_AU
dc.identifier.pagination205-212en_AU
dc.identifier.urihttp://dx.doi.org/10.1007/s13632-013-0080-xen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/6081en_AU
dc.identifier.volume2en_AU
dc.language.isoenen_AU
dc.publisherSpringer USen_AU
dc.subjectDiffractionen_AU
dc.subjectLasersen_AU
dc.subjectResidual stressesen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectHeat treatmentsen_AU
dc.subjectCladdingen_AU
dc.titleInvestigation into heat treatment and residual stress in laser clad AA7075 powder on AA7075 substrateen_AU
dc.typeJournal Articleen_AU
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