Generation and characterization of T40/A5754 interfaces with lasers
TypeArticles dans des revues avec comité de lecture
Laser-induced reactive wetting and brazing of T40 titanium with A5754 aluminum alloy with 1.5 mm thickness was carried out in lap-joint configuration, with or without the use of Al5Si filler wire. A 2.4 mm diameter laser spot was positioned on the aluminum side to provoke spreading and wetting of the lower titanium sheet, with relatively low scanning speeds (0.1 to 0.6 m/min). Process conditions did not play a very significant role on mechanical strengths, which were shown to reach 250-300 N/mm on a large range of laser power and scanning speeds. In all cases considered, the fracture during tensile testing occurred next to the TiAl3 interface, but in the aluminum fusion zone. In a second step, we have investigated the interfacial resistance with the LASAT bond strength tester, based upon the generation and propagation of laser-induced shock waves. This allowed us estimating a uniaxial bond strength of 0.68 GPa for the T40/A5754 interface under dynamic loading conditions.
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PEYRE, Patrice; BERTHE, Laurent; DAL, Morgan; POUZET, Sébastien; SALLAMAND, Pierre; TOMASHCHUK, Iryna (Elsevier, 2014)Laser-induced reactive wetting and brazing of T40 titanium with A5754 aluminum alloy with 1.5 mm thickness was carried out in lap-joint conﬁguration, with or without the use of Al5Si ﬁller wire. A 2.4 mm diameter laser ...
TOMASHCHUK, Iryna; SALLAMAND, Pierre; CICALA, E; PEYRE, Patrice; GREVEY, D (Elsevier, 2014)The tensile strength of direct AA5754/Ti6Al4V joints performed by high speed Yb:YAG laser welding is found to be determined by morphology and phase content of dissimilar interface formed between contacting Al-rich and ...
PEYRE, Patrice; DAL, Morgan; POUZET, Sébastien; CASTELNAU, Olivier (Laser Institute of America, 2017)The laser metal deposition (LMD) laser technique is a free-form metal deposition process, which allows generating near net-shape structures through the interaction of a powder stream and a laser beam. A simplified numerical ...
TOMASHCHUK, Iryna; SALLAMAND, Pierre; MÉASSON, A.; CICALA, E; DUBAND, M; PEYRE, P (Elsevier, 2017)Laser assisted joining of AA5754 aluminum alloy to T40 titanium with use of Al-Si filler wires was carried out. Continuous Yb:YAG laser beam was shaped into double spot tandem and defocalized to cover larger interaction ...
Analysis and possible estimation of keyhole depths evolution, using laser operating parameters and material properties FABBRO, Rémy; DAL, Morgan; PEYRE, Patrice; COSTE, Frédéric; SCHNEIDER, Matthieu; GUNENTHIRAM, V (Laser Institute of America, 2018)The authors propose an analysis of the effect of various operating parameters on the keyhole depth during laser welding. The authors have developed a model that uses the analysis of the thermal field obtained in 2D geometry, ...