Microstructural characterisation and mechanical properties of dissimilar AA5083-copper joints produced by friction stir welding

Gihad Karrar; Alexander Galloway; Athanasios Toumpis; Hongjun Li; Fadi Al-Badour

doi:10.1016/j.jmrt.2020.08.073

Microstructural characterisation and mechanical properties of dissimilar AA5083-copper joints produced by friction stir welding

Gihad Karrar, Alexander Galloway, Athanasios Toumpis, Hongjun Li, Fadi Al-Badour

Mechanical And Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

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Abstract

This work aims to study the influence of the tool rotational speed and tool traverse speed on dissimilar friction stir butt welds on 3 mm thick AA5083 to commercially pure copper plates. Complex microstructures were formed in the thermo-mechanically affected zone, in which a vortex-like pattern and lamellar structures were found. Several intermetallic compounds were identified in this region, such as Al2Cu, Al4Cu9 and these developed an inhomogeneous hardness distribution. The highest ultimate tensile strength of 203 MPa and joint efficiency of 94.8% were achieved at 1400 rpm tool rotational speed and 120 mm/min traverse speed. Placing the softer material (aluminium) on the advancing side produced an excellent metallurgical bond with no requirement for tool offsetting.

Original language	English
Pages (from-to)	11968-11979
Number of pages	12
Journal	Journal of Materials Research and Technology
Volume	9
Issue number	5
Early online date	2 Sep 2020
DOIs	https://doi.org/10.1016/j.jmrt.2020.08.073
Publication status	Published - 31 Oct 2020

Keywords

intermetallic compounds
friction stir welding
mechanical properties
dissimilar joining
AA5083
commercially pure copper

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title = "Microstructural characterisation and mechanical properties of dissimilar AA5083-copper joints produced by friction stir welding",

abstract = "This work aims to study the influence of the tool rotational speed and tool traverse speed on dissimilar friction stir butt welds on 3 mm thick AA5083 to commercially pure copper plates. Complex microstructures were formed in the thermo-mechanically affected zone, in which a vortex-like pattern and lamellar structures were found. Several intermetallic compounds were identified in this region, such as Al2Cu, Al4Cu9 and these developed an inhomogeneous hardness distribution. The highest ultimate tensile strength of 203 MPa and joint efficiency of 94.8% were achieved at 1400 rpm tool rotational speed and 120 mm/min traverse speed. Placing the softer material (aluminium) on the advancing side produced an excellent metallurgical bond with no requirement for tool offsetting.",

keywords = "intermetallic compounds, friction stir welding, mechanical properties, dissimilar joining, AA5083, commercially pure copper",

author = "Gihad Karrar and Alexander Galloway and Athanasios Toumpis and Hongjun Li and Fadi Al-Badour",

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Microstructural characterisation and mechanical properties of dissimilar AA5083-copper joints produced by friction stir welding. / Karrar, Gihad ; Galloway, Alexander ; Toumpis, Athanasios; Li, Hongjun; Al-Badour, Fadi.

In: Journal of Materials Research and Technology, Vol. 9, No. 5, 31.10.2020, p. 11968-11979.

Research output: Contribution to journal › Article › peer-review

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AU - Karrar, Gihad

AU - Galloway, Alexander

AU - Toumpis, Athanasios

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AU - Al-Badour, Fadi

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