Yakubov, V;
Ostergaard, H;
Bhagavath, S;
Leung, CLA;
Hughes, J;
Yasa, E;
Khezri, M;
... Paradowska, AM; + view all
(2024)
Hardness Distribution and Defect Formation in Aluminium Alloys Fabricated via Additive Friction Stir Deposition (AFSD).
In:
11th Australasian Congress on Applied Mechanics, ACAM 2024: Faster, Stronger, Leaner – Advancing Applied Mechanics for a Resilient and Sustainable Future.
(pp. pp. 244-251).
Engineers Australia: Brisbane, Australia.
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Abstract
Additive friction stir deposition (AFSD) is an emerging solid-state additive manufacturing technique where material is deposited layer-by-layer. Unlike fusion-based additive manufacturing processes, AFSD relies on a rotating tool to extrude and bond feedstock material through frictional heat and pressure, keeping the material below its melting point to eliminate fusion-related defects. It is suitable for large structure fabrication due to its high deposition rate. However, AFSD is still in development, with questions concerning hardness variation along the build height, defect formation, and residual stress distribution. In this research, an AFSD-manufactured structure is examined using optical microscopy, Vickers hardness testing, and neutron diffraction. Optical microscopy reveals defects at first layer and substrate interface as well as deposit edges, while hardness testing indicates deposit hardness decreases from final layer to first layer. Neutron diffraction shows tensile residual stress near the fusion zone in the substrate with compressive residual stress in majority of deposit.
| Type: | Proceedings paper |
|---|---|
| Title: | Hardness Distribution and Defect Formation in Aluminium Alloys Fabricated via Additive Friction Stir Deposition (AFSD) |
| Event: | 11th Australasian Congress on Applied Mechanics, ACAM 2024 |
| ISBN-13: | 9781713894926 |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | https://www.proceedings.com/content/074/074141webt... |
| Language: | English |
| Additional information: | Proceedings © copyright Engineers Australia 2024. This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10194903 |
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