Issue |
Metall. Res. Technol.
Volume 120, Number 1, 2023
|
|
---|---|---|
Article Number | 118 | |
Number of page(s) | 24 | |
DOI | https://doi.org/10.1051/metal/2023014 | |
Published online | 22 February 2023 |
Original Article
Effect of rotational speed and copper interlayer on the mechanical and fracture behaviour of friction stir spot welds of 5754 aluminium alloy
1
Ecole Militaire Polytechnique, BP17, Bordj el Bahri, Algiers, Algeria
2
Research Center in Industrial Technologies, BP 64, Cheraga, Algiers, Algeria
3
Royal Military Academy, Avenue de la Renaissance 30, 1000 Brussels, Belgium
4
Center of Research and Development-Air Forces, BP 142, Dar El-Beida, Algiers, Algeria
* e-mail: lionel.gilson@dymasec.be
Received:
14
November
2022
Accepted:
17
January
2023
The application of joining processes requires advanced mechanical tests to control the joints’ quality. Generally, welded sheets are verified using tensile shear tests. However, few studies also recommend conducting tension peel and cross-tension tests. The present work evaluates the mechanical behaviour of 5754 aluminium sheets jointed by friction stir spot welding (FSSW). The influence of the rotational speed on joint strength was first compared to riveted assemblies. Then, sheets welded with pure copper interlayers were compared to the precedents. The results indicated that, without an interlayer, lower and intermediate rotational speeds lead to higher mechanical strength under tensile shear tests compared to riveted assembly. However, it performed worse under tension peel and cross-tension tests at all studied rotational speeds. By adding copper, the strength of welded sheets is globally improved under tensile shear tests. Nevertheless, under tension peel and cross-tension tests, it performed worse, although a slight improvement was observed for increasing rotational speeds. Two different failure morphologies and four fracture modes were observed regarding the different tested samples. Microhardness tests were also conducted, to relate the influence of the studied parameters on the joint’s strength.
Key words: friction stir spot welding / 5754 aluminium alloy / microhardness / mechanical testing / failure and fracture modes
© EDP Sciences, 2023
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.