In-situ monitoring of component integrity during additive manufacturing Using Optical Coherence Tomography
Lead Research Organisation:
University of Nottingham
Department Name: Faculty of Engineering
Abstract
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Publications
Clare A
(2017)
Electrolyte design for suspended particulates in electrolyte jet processing
in CIRP Annals
Dryburgh P
(2019)
Spatially resolved acoustic spectroscopy for integrity assessment in wire-arc additive manufacturing
in Additive Manufacturing
Everton S
(2016)
Review of in-situ process monitoring and in-situ metrology for metal additive manufacturing
in Materials & Design
Gorji N
(2020)
A new method for assessing the recyclability of powders within Powder Bed Fusion process
in Materials Characterization
Guan G
(2015)
Evaluation of selective laser sintering processes by optical coherence tomography
in Materials & Design
Guan G
(2016)
Loose powder detection and surface characterization in selective laser sintering via optical coherence tomography.
in Proceedings. Mathematical, physical, and engineering sciences
Mitchell-Smith J
(2016)
ElectroChemical Jet Machining of Titanium: Overcoming Passivation Layers with Ultrasonic Assistance
in Procedia CIRP
Mitchell-Smith J
(2018)
Advancing electrochemical jet methods through manipulation of the angle of address
in Journal of Materials Processing Technology
Mitchell-Smith J
(2018)
Transitory electrochemical masking for precision jet processing techniques
in Journal of Manufacturing Processes
| Description | [2015] A demonstrator strategy for analyzing SLS components via Optical coherence tomography has been established. The team is currently building a system capable of performing in-situ type measurements. Early results indicate that OCT is a viable method although some process improvement in required. Typical penetration depths achievable in PA12 using a standard OCT approach are 200-300um. This depends upon the efficacy of the sintering process and the condition of the material feedstock. [2016] This project has developed rapidly over the course of the last year and significant enhancements have been made by the team. For the first time OCT has been used for the detection of subsurface defects including lose powder. The team has also developed image analysis protocols which are capable of differentiating lose powder with solid material using analysis of OCT data. |
| Exploitation Route | [2015] The project is still only in its infancy. Both Guanying Guan and Matthias Hirsch (researchers on this project) are preparing a first research paper which will set the tone for the field. Working with researchers at U of Sehffield it is expected that demonstrator system which makes use of OCT in SLS will be suitable for integrity measurements of 3D printed parts particularly for the biomedical and aerospace sectors. [2016] The results generated here have been fed into the academic space through key publications relating to the area (doi:10.1016/j.matdes.2016.01.099 AND DOI: 10.1016/j.matdes.2015.09.084). These outcomes are of value for our community and evidence of this is already apparent with notable research activities gearing up in this space in other countries. Interest here has been expressed to the project PI about some of these areas. |
| Sectors | Aerospace Defence and Marine Manufacturing including Industrial Biotechology |
| Description | Findings are now being published in academic journals for this work including a notable publication in materials and design (doi:10.1016/j.matdes.2016.01.099). This has now been picked up upon by academic partners interested in exploiting OCT methodologies for other areas of manufacturing. This includes other researcher in the AM space looking to use this apparatus alongside SRAS (see EP/L022125/1) where the consortia of companies is being used to help develop routes to impact for this project. In addtion Leeds have joined the project and a new dimension has now added to the project in terms of reach into the biomedical sector. UPDATE 3/3/20 - it is clear that reflecting on much of my work in SRAS and process monitoring does relate to this earlier work in OCT and hence I have attributed these publications. |
| First Year Of Impact | 2017 |
| Sector | Aerospace, Defence and Marine,Manufacturing, including Industrial Biotechology |
| Impact Types | Societal Economic |
| Description | UK RESEARCH CENTRE IN NON-DESTRUCTIVE EVALUATION (RCNDE) 2014-2020 |
| Amount | £2,000,000 (GBP) |
| Funding ID | EP/L022125/1 |
| Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
| Sector | Public |
| Country | United Kingdom |
| Start | 07/2014 |
| Description | Engagement with RCNDE and Applied optics University of Nottingham |
| Organisation | University of Kent |
| Department | Applied Optics Group |
| Country | United Kingdom |
| Sector | Academic/University |
| PI Contribution | This collaboration builds upon the work undertaken as part of EPSRC project work to move toward RCNDE sponsored work which also involves collaboration with Renishaw. |
| Collaborator Contribution | Our partners are mostly interested in developing hardware. |
| Impact | Multiple - see publications |
| Start Year | 2017 |