The effects of x-ray computed tomography filament degradation on extracted areal surface texture data

Jonathan Slocombe, Andrew Townsend, Katie Addinall, Liam Blunt

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The addition of x-ray computed tomography (XCT) to the arsenal of available surface metrology methods has proved particularly advantageous due to its ability to perform areal surface analysis of surfaces with no line-of-sight (optical or contact stylus). This technique has particular application for parts manufactured by additive manufacturing techniques (AM). The combination of the use of XCT for dimensional checks and extraction of surface topography has led to significant interest in XCT as a metrology tool. Recent research has led to the development of validation of the methods by which useable areal surface texture data can be extracted from XCT scans. Various factors effecting the values obtained from this process were highlighted previously. The paper highlighted a significant change to data following a filament change, this may be attributed to the filaments not being dimensionally identical, not being seated in the same position or possibly degrading during their useful life. Filament changes are a regular maintenance procedure carried out when using XCT machines this is due to the consumable filaments reaching the end of life. At the point where a filament has reached end of life its diameter will have decreased by approximately 5-6% [1]. This paper reports on a research program which has investigated the statistically significant changes to the measured surface texture data from a known surface, throughout the lifetime of an XCT filament. The results are presented in terms of changes to extracted areal texture parameters per ISO 25178-2 and show that during the filament lifetime the effects of filament degradation needs to be taken into account and a maintenance/validation checks need to be regularly carried out.

Original languageEnglish
Title of host publicationEuropean Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019
EditorsRichard K. Leach, D. Billington, C. Nisbet, D. Phillips
Publishereuspen
Pages346-349
Number of pages4
ISBN (Electronic)9780995775145
Publication statusPublished - 2019
Event19th International Conference of the European Society for Precision Engineering and Nanotechnology - Euskalduna, Bilbao, Spain
Duration: 3 Jun 20197 Jun 2019
Conference number: 19
https://www.euspen.eu/events/19th-ice-bilbao/

Conference

Conference19th International Conference of the European Society for Precision Engineering and Nanotechnology
Abbreviated titleEUSPEN 2019
CountrySpain
CityBilbao
Period3/06/197/06/19
Internet address

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  • Cite this

    Slocombe, J., Townsend, A., Addinall, K., & Blunt, L. (2019). The effects of x-ray computed tomography filament degradation on extracted areal surface texture data. In R. K. Leach, D. Billington, C. Nisbet, & D. Phillips (Eds.), European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019 (pp. 346-349). euspen.