A non-destructive study of crack development during thermal cycling of Al wire bonds using x-ray computed tomography
This paper concerns the non-destructive visualisation of the evolution of damage within ultrasonically bonded alumini-um wires using three dimensional x-ray computed tomography. We demonstrate the potential to observe the progressive accumulation of damage within the same wires during passive therma...
| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Published: |
2014
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| Online Access: | https://eprints.nottingham.ac.uk/45546/ |
| _version_ | 1848797151548669952 |
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| author | Agyakwa, Pearl Yang, Li Corfield, Martin Johnson, Christopher Mark |
| author_facet | Agyakwa, Pearl Yang, Li Corfield, Martin Johnson, Christopher Mark |
| author_sort | Agyakwa, Pearl |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | This paper concerns the non-destructive visualisation of the evolution of damage within ultrasonically bonded alumini-um wires using three dimensional x-ray computed tomography. We demonstrate the potential to observe the progressive accumulation of damage within the same wires during passive thermal cycling between -55°C and 190°C. Tomography datasets were obtained prior to and after cycling. Cracks could be seen emerging from the extreme ends of the bonds when imaged after 105 cycles. Subsequent cycling lead to the advancement of these cracks toward the centres of the bonds. In addition, damage developed within the interior of the bonds; these also grew with increase in number of cy¬cles, and merged with existing cracks. Virtual cross-sections have been analysed to quantify the rate of damage build up. |
| first_indexed | 2025-11-14T19:59:19Z |
| format | Conference or Workshop Item |
| id | nottingham-45546 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:59:19Z |
| publishDate | 2014 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-455462020-05-04T16:44:28Z https://eprints.nottingham.ac.uk/45546/ A non-destructive study of crack development during thermal cycling of Al wire bonds using x-ray computed tomography Agyakwa, Pearl Yang, Li Corfield, Martin Johnson, Christopher Mark This paper concerns the non-destructive visualisation of the evolution of damage within ultrasonically bonded alumini-um wires using three dimensional x-ray computed tomography. We demonstrate the potential to observe the progressive accumulation of damage within the same wires during passive thermal cycling between -55°C and 190°C. Tomography datasets were obtained prior to and after cycling. Cracks could be seen emerging from the extreme ends of the bonds when imaged after 105 cycles. Subsequent cycling lead to the advancement of these cracks toward the centres of the bonds. In addition, damage developed within the interior of the bonds; these also grew with increase in number of cy¬cles, and merged with existing cracks. Virtual cross-sections have been analysed to quantify the rate of damage build up. 2014-03-21 Conference or Workshop Item PeerReviewed Agyakwa, Pearl, Yang, Li, Corfield, Martin and Johnson, Christopher Mark (2014) A non-destructive study of crack development during thermal cycling of Al wire bonds using x-ray computed tomography. In: 8th International Conference on Integrated Power Electronics Systems, 25-27 February 2014, Nuremberg, Germany. http://ieeexplore.ieee.org/abstract/document/6776818/ |
| spellingShingle | Agyakwa, Pearl Yang, Li Corfield, Martin Johnson, Christopher Mark A non-destructive study of crack development during thermal cycling of Al wire bonds using x-ray computed tomography |
| title | A non-destructive study of crack development during thermal cycling of Al wire bonds using x-ray computed tomography |
| title_full | A non-destructive study of crack development during thermal cycling of Al wire bonds using x-ray computed tomography |
| title_fullStr | A non-destructive study of crack development during thermal cycling of Al wire bonds using x-ray computed tomography |
| title_full_unstemmed | A non-destructive study of crack development during thermal cycling of Al wire bonds using x-ray computed tomography |
| title_short | A non-destructive study of crack development during thermal cycling of Al wire bonds using x-ray computed tomography |
| title_sort | non-destructive study of crack development during thermal cycling of al wire bonds using x-ray computed tomography |
| url | https://eprints.nottingham.ac.uk/45546/ https://eprints.nottingham.ac.uk/45546/ |