Aluminium alloys, widely used in aeronautics, are increasingly involved in the automotive industry due to the good relationship between mechanical strength and specific weight. The lightening of the structures is the first objective, which allows the decreasing in the weight in motion. The use of aluminium alloys has also seen the introduction of the Friction Stir Welding (FSW) technique for the production of structural overlapping joints. FSW allows us to weld overlap joints free from defects, but with the presence of a structural notch further aggravated by the presence of a “hook” defect near the edge of the weld. Furthermore, FSW presents a weld penetration area connected to the tool geometry and penetration. The experimental activity will be focused on the combination of two different joining techniques, which can synergistically improve the final joint resistance. In particular, the welding and bonding process most commonly known as weld-bonding is defined as a hybrid process, as it combines two different junction processes. In this paper we analyse FSWelded AA6082 aluminium alloy overlapped joint with the aim of quantitatively evaluating the improvement provided by the presence of an epoxy adhesive between the plates. After optimising the weld-bonding process, the mechanical behaviour of welded joints will be analysed by static and dynamic tests. The presence of the adhesive should limit the negative effect of the structural notch inevitable in a FSW overlapped joint.
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2 May 2018
PROCEEDINGS OF THE 21ST INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING: ESAFORM 2018
23–25 April 2018
Palermo, Italy
Research Article|
May 02 2018
Hybrid FSWeld-bonded joint fatigue behaviour
Enrico Lertora;
Enrico Lertora
a)
1
Department of Mechanical Engineering, Polytechnic School of University of Genoa
, Via Opera Pia 15, Italy
a)Corresponding author: [email protected]
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Chiara Mandolfino;
Chiara Mandolfino
b)
1
Department of Mechanical Engineering, Polytechnic School of University of Genoa
, Via Opera Pia 15, Italy
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Carla Gambaro;
Carla Gambaro
c)
1
Department of Mechanical Engineering, Polytechnic School of University of Genoa
, Via Opera Pia 15, Italy
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Marco Pizzorni
Marco Pizzorni
d)
1
Department of Mechanical Engineering, Polytechnic School of University of Genoa
, Via Opera Pia 15, Italy
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a)Corresponding author: [email protected]
AIP Conf. Proc. 1960, 050011 (2018)
Citation
Enrico Lertora, Chiara Mandolfino, Carla Gambaro, Marco Pizzorni; Hybrid FSWeld-bonded joint fatigue behaviour. AIP Conf. Proc. 2 May 2018; 1960 (1): 050011. https://doi.org/10.1063/1.5034884
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