Published in
Elsevier, Optics and Lasers in Engineering, (62), p. 112-118, 2014
DOI: 10.1016/j.optlaseng.2014.05.005
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Laser beam welding of CuZn open-cell foams
Full text: Unavailable
Abstract
"Porous metallicmaterialswithcellularstructurescombinemanyphysicalandfunctionalcharacteristics. This mixtureofdifferentpropertiesmakesthesematerialsveryattractiveforthedevelopmentof advancedapplications,whichareespeciallyimportantinthebiomedical,structuralandfunctional engineering, andelectrochemical fields. Becauseoftheircellularstructure,unconventionalprocessingis becoming increasinglyimportantforpromotingtheindustrialapplicationsofthesematerials. In thiswork,theweldingofopen-cellCu60Zn40 [wt%] foamsusinga1kWcontinuous-wave fibre laser wasinvestigated.Duringweldingtestsperformedinthebead-on-plateconfiguration, adeteriora- tion ofthecellularstructurewasobserved,withpoorevidenceforthejoiningofsurfaces.Incontrast, tests performedinthelap-jointconfiguration resultedinsuccessfulweldingusinga1-mm-thickplateof the samematerialasthefoams.Theeffectoftheprocessspeedonthegeometricalcharacteristicsofthe transversesectionofthejointswasstudied,andtheheat-affectedzonewasevaluatedviaahardness test. Finally,acompositionalanalysisoftheweldbeadwasperformedusingascanningelectron microscope coupledwithanenergydispersivespectrometer. The resultsofthisstudyindicatethatweldingprocessesusinga fibre lasercanbeutilisedtojoinCu- based foams.Weldbeadsinthelap-jointconfiguration wereachievedduetothethinplatematerial filling theporevoids."