Initiation and growth kinetics of solidification cracking during welding of steel
Solidification cracking is a key phenomenon associated with defect formation during welding. To elucidate the failure mechanisms, solidification cracking during arc welding of steel are investigated in situ with high-speed, high-energy synchrotron X-ray radiography. Damage initiates at relatively lo...
| Main Authors: | , , , , , , |
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| Format: | Journal article |
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Nature Publishing Group
2017
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| _version_ | 1826298070191570944 |
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| author | Aucott, L Huang, D Dong, H Wen, S Marsden, J Rack, A Cocks, A |
| author_facet | Aucott, L Huang, D Dong, H Wen, S Marsden, J Rack, A Cocks, A |
| author_sort | Aucott, L |
| collection | OXFORD |
| description | Solidification cracking is a key phenomenon associated with defect formation during welding. To elucidate the failure mechanisms, solidification cracking during arc welding of steel are investigated in situ with high-speed, high-energy synchrotron X-ray radiography. Damage initiates at relatively low true strain of about 3.1% in the form of micro-cavities at the weld subsurface where peak volumetric strain and triaxiality are localised. The initial micro-cavities, with sizes from 10 × 10−6 m to 27 × 10−6 m, are mostly formed in isolation as revealed by synchrotron X-ray micro-tomography. The growth of micro-cavities is driven by increasing strain induced to the solidifying steel. Cavities grow through coalescence of micro-cavities to form micro-cracks first and then through the propagation of microcracks. Cracks propagate from the core of the weld towards the free surface along the solidifying grain boundaries at a speed of 2–3 × 10−3 m s−1. |
| first_indexed | 2024-03-07T04:41:13Z |
| format | Journal article |
| id | oxford-uuid:d1b79edb-cc70-483b-a20c-7bf49dfae0c3 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T04:41:13Z |
| publishDate | 2017 |
| publisher | Nature Publishing Group |
| record_format | dspace |
| spelling | oxford-uuid:d1b79edb-cc70-483b-a20c-7bf49dfae0c32022-03-27T07:58:50ZInitiation and growth kinetics of solidification cracking during welding of steelJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:d1b79edb-cc70-483b-a20c-7bf49dfae0c3Symplectic Elements at OxfordNature Publishing Group2017Aucott, LHuang, DDong, HWen, SMarsden, JRack, ACocks, ASolidification cracking is a key phenomenon associated with defect formation during welding. To elucidate the failure mechanisms, solidification cracking during arc welding of steel are investigated in situ with high-speed, high-energy synchrotron X-ray radiography. Damage initiates at relatively low true strain of about 3.1% in the form of micro-cavities at the weld subsurface where peak volumetric strain and triaxiality are localised. The initial micro-cavities, with sizes from 10 × 10−6 m to 27 × 10−6 m, are mostly formed in isolation as revealed by synchrotron X-ray micro-tomography. The growth of micro-cavities is driven by increasing strain induced to the solidifying steel. Cavities grow through coalescence of micro-cavities to form micro-cracks first and then through the propagation of microcracks. Cracks propagate from the core of the weld towards the free surface along the solidifying grain boundaries at a speed of 2–3 × 10−3 m s−1. |
| spellingShingle | Aucott, L Huang, D Dong, H Wen, S Marsden, J Rack, A Cocks, A Initiation and growth kinetics of solidification cracking during welding of steel |
| title | Initiation and growth kinetics of solidification cracking during welding of steel |
| title_full | Initiation and growth kinetics of solidification cracking during welding of steel |
| title_fullStr | Initiation and growth kinetics of solidification cracking during welding of steel |
| title_full_unstemmed | Initiation and growth kinetics of solidification cracking during welding of steel |
| title_short | Initiation and growth kinetics of solidification cracking during welding of steel |
| title_sort | initiation and growth kinetics of solidification cracking during welding of steel |
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