Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5206641 | Polymer Testing | 2013 | 5 Pages |
Abstract
The processing of thermoplastics can induce a wide range of defects such as stress whitening, cavitation and porosity, which can adversely affect the reliability of the final products. Hence, fast and effective non-destructive detection methods for such defects are highly important for quality assurance on production lines. In this paper, X-ray dark field imaging is presented as a new non-destructive testing method that allows the visualization of stress whitening or cavitation efficiently. The performance of the method is demonstrated for the case of an injection-moulded polyvinylidene fluoride part that exhibits stress whitening. Whereas the stress whitening could not be detected by conventional X-ray imaging, it was localized by an X-ray dark field image acquired within a few minutes. Once the precise location of the stress whitening was known, it was possible to verify the result by local micro X-ray computed tomography and by a micro section image.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Iwan Jerjen, Vincent Revol, Andreas J. Brunner, Philipp Schuetz, Christian Kottler, Rolf Kaufmann, Thomas Luethi, Giovanni Nicoletti, Claus Urban, Urs Sennhauser,