Hosseinzadh Torknezhad, F.; Ledgard, P. and Bouchard, P. J.
(2013).
| DOI (Digital Object Identifier) Link: | http://dx.doi.org/doi:10.1007/s11340-012-9686-1 |
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Abstract
The multiple cut contour method is applied to map longitudinal and transverse components of residual stress in two nominally identical 50 mm thick electron beam welded Ti-6Al-4V alloy plates, one in the as-welded condition and a second welded plate in a post weld heat treated (PWHT) condition. The accuracy and resolution of the contour method results are directly linked to the quality of the electro-discharge machining cut made. Two symmetric surface contour artefacts associated with cutting titanium, surface bowing and a flared edge, are identified and their influence on residual stresses calculated by the contour method is quantified. The former artefact is controlled by undertaking a series of cutting trials with reduced power settings to find optimal cutting conditions. The latter is mitigated by attaching 5 mm thick sacrificial plates to the wire exit side of the test specimen. The low level of noise in the measured stress profiles for both the as-welded and PWHT plates demonstrates the importance of controlling the quality of a contour cut and the added value of undertaking cutting trials.
| Item Type: | Journal Article |
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| Copyright Holders: | 2012 Society for Experimental Mechanics |
| ISSN: | 1741-2765 |
| Keywords: | titanium; residual stress; contour method; wire electric discharge machining; artefact |
| Academic Unit/Department: | Mathematics, Computing and Technology > Design, Development, Environment and Materials Mathematics, Computing and Technology |
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| Item ID: | 35094 |
| Depositing User: | Foroogh Hosseinzadh Torknezhad |
| Date Deposited: | 31 Oct 2012 14:04 |
| Last Modified: | 20 May 2013 09:26 |
| URI: | http://oro.open.ac.uk/id/eprint/35094 |
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