Mason, Benjamin  ORCID: https://orcid.org/0000-0002-2136-3252, Ryan, Michael ORCID: https://orcid.org/0000-0002-8104-0121, Setchi, Rossitza ORCID: https://orcid.org/0000-0002-7207-6544, Kundu, Abhishek ORCID: https://orcid.org/0000-0002-8714-4087, Nishio Ayre, Wayne ORCID: https://orcid.org/0000-0003-2405-1876 and Bhaduri, Debajyoti ORCID: https://orcid.org/0000-0002-8270-388X
2023.
Development of a novel laser polishing strategy for additively manufactured AlSi10Mg alloy parts.
Presented at: 9th International Conference on Sustainable Design and Manufacturing - SDM 2022,
Split, Croatia,
16-17 September 2022.
Published in: Scholz, S.G., Howlett, R.J. and Setchi, R. eds.
Sustainable Design and Manufacturing.
Smart Innovation, Systems and Technologies
, vol.338
Singapore:
Springer,
pp. 272-282.
10.1007/978-981-19-9205-6_26
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Abstract
Post-processing of additively manufactured (AM) aluminium alloy parts via laser polishing (LP) is particularly challenging due to the materials’ high thermal conductivity, diffusivity, and reflectivity. Here, a novel multi-step laser polishing strategy, by combining laser ablation and smoothing steps, is developed that effectively reduces the surface roughness of AM AlSi10Mg parts. The min-imum average roughness (Sa) and 10-point height (S10z) are achieved as 1.81 μm and 23.7 μm, representing maximum reductions of 94.1% and 89.8%, respectively, from the as-built AM surfaces (initial Sa 8 – 28 μm). A strong rela-tionship has been observed between the initial surface roughness and the achiev-able roughness reduction. Regarding the other surface integrity factors, sub-sur-face microhardness (between 10-40 μm) after LP increases up to 182 HV0.01, compared to the bulk hardness (105 HV0.01) measured ~60 μm below the surface. Clear evidence of material’s flow within the surface asperities during the LP steps is observed from the cross-sectional microstructures. Further study will involve in-depth analysis of materials’ compositions within the LP-processed layers.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Dentistry Schools > Engineering |
| Publisher: | Springer |
| ISBN: | 978-981-19-9204-9 |
| Date of First Compliant Deposit: | 5 August 2022 |
| Date of Acceptance: | 2022 |
| Last Modified: | 14 Mar 2025 16:06 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/151735 |
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