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Jabar, S, Baghbani Barenji, A, Franciosa, P, Kotadia, HR and Ceglarek, D (2023) Effects of the adjustable ring-mode laser on intermetallic formation and mechanical properties of steel to aluminium laser welded lap joints. Materials and Design, 227. ISSN 0264-1275
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Effects of the adjustable ring-mode laser on intermetallic formation and mechanical properties of steel to aluminium laser welded lap joints.pdf - Published Version Available under License Creative Commons Attribution. Download (5MB) | Preview |
Abstract
Research has confirmed a positive effect of laser beam shaping on controlling weld profiles and keyhole stabilisation, with significant reductions of porosity in weldments. However, few attempts with scattered results have studied the impact of laser beam shaping on intermetallic phase formation. This paper implements the adjustable-ring mode (ARM) laser and studies the impact of the core/ring power ratio to explore the impact on intermetallic phase formation and mechanical properties during remote laser welding of IF steel to 1050 aluminium. It was found that in conduction mode, the core/ring power ratio of 0.2 provided a larger surface area for bonding at the weld interface, and this was translated through the maximum lap-shear strength of 97.6 N/mm2 (joint efficiency 71%). Furthermore, this significantly reduced the Fe2Al5 intermetallic compound (IMC) thickness by 62% and total IMC thickness by 40% in contrast to a core-dominant beam (power ratio greater than one). In keyhole mode, cracking and lower lap-shear strengths were observed compared to the conduction mode. Notably, with a core/ring power ratio of 0.5 a significant grain refinement in the steel side of the weld was observed.
| Item Type: | Article |
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| Uncontrolled Keywords: | 0910 Manufacturing Engineering; 0912 Materials Engineering; 0913 Mechanical Engineering; Materials |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Engineering |
| Publisher: | Elsevier |
| SWORD Depositor: | A Symplectic |
| Date Deposited: | 19 May 2023 10:56 |
| Last Modified: | 19 May 2023 11:00 |
| DOI or ID number: | 10.1016/j.matdes.2023.111774 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/19535 |
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