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RESEARCH PRODUCT
Microstructure and mechanical properties of dissimilar Ti/Nb/Cu/steel laser joints
Sébastien LafayeRodolphe BolotAntoine MannucciIryna TomashchukAlexandre Mathieusubject
0209 industrial biotechnologyMaterials scienceIntermetallicNiobiumchemistry.chemical_elementTitanium alloyLaser beam welding02 engineering and technology010501 environmental sciencesMicrostructure01 natural sciencesCopper020901 industrial engineering & automationBrittlenesschemistryGeneral Earth and Planetary SciencesComposite material0105 earth and related environmental sciencesGeneral Environmental ScienceTitaniumdescription
Abstract The absence of intermetallic phases in Fe/Cu, Cu/Nb and Nb/Ti binary systems opens the possibility to obtain reliable joints between titanium alloys and steels by using a multimaterial copper/niobium insert. Continuous Yb:YAG laser welding of 1 mm thick titanium and 316L stainless steel plates through niobium/copper multimaterial insert was performed. The use of a 100 µm laser beam allowed producing isolated molten zones and thus completely avoiding the formation of brittle intermetallic phases, according to SEM and XRD analysis. The effect of energy per unit length applied to the niobium/copper welds on the mixing process and mechanical properties of the joints was investigated. A ductile fracture systematically occurred in the unmelted copper zone of the joints at maximal average UTS of 250 MPa.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-01-01 | Procedia CIRP |