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 ...
PEYRE, Patrice; DAL, Morgan; POUZET, S Ebastien; 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 ...
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Multiphysics Simulation and Experimental Investigation of Aluminum Wettability on a Titanium Substrate for Laser Welding-Brazing Process DAL, Morgan; PEYRE, Patrice (MDPI, 2017)The control of metal wettability is a key-factor in the field of brazing or welding-brazing. The present paper deals with the numerical simulation of the whole phenomena occurring during the assembly of dissimilar alloys. ...
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