Direct laser welding of pure titanium to austenitic stainless steel

Direct butt joining of pure titanium to 316L stainless steel with continuous Yb:YAG laser was performed with variation of the beam offset from joint line. Mechanical properties of samples were evaluated by tensile tests and three-point flexural tests. The fractured surfaces and cross sections of wel...

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Veröffentlicht in:Procedia CIRP 2018, Vol.74, p.485-490
Hauptverfasser: Mannucci, Antoine, Tomashchuk, Iryna, Mathieu, Alexandre, Cicala, Eugen, Boucheron, Tommy, Bolot, Rodolphe, Lafaye, Sebastien
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Sprache:eng
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Zusammenfassung:Direct butt joining of pure titanium to 316L stainless steel with continuous Yb:YAG laser was performed with variation of the beam offset from joint line. Mechanical properties of samples were evaluated by tensile tests and three-point flexural tests. The fractured surfaces and cross sections of welds were examined by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). Tensile properties of welds were strongly determined by the beam offset from joint line and are well described by Weibull statistics. Ultimate tensile strength of 174 ± 69 MPa and ultimate flexural strength of 297 ± 48 MPa were obtained. Brittle fracture took place in the diffusive interface rich in λ1 and FeTi phases.
ISSN:2212-8271
2212-8271
DOI:10.1016/j.procir.2018.08.138