Hosseinzadh Torknezhad, F.; Ledgard, P. and Bouchard, P. J.
|DOI (Digital Object Identifier) Link:||http://doi.org/10.1007/s11340-012-9686-1|
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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|
|Copyright Holders:||2012 Society for Experimental Mechanics|
|Keywords:||titanium; residual stress; contour method; wire electric discharge machining; artefact|
|Academic Unit/Department:||Mathematics, Computing and Technology > Engineering & Innovation
Mathematics, Computing and Technology
|Depositing User:||Foroogh Hosseinzadeh|
|Date Deposited:||31 Oct 2012 14:04|
|Last Modified:||18 Jan 2016 15:55|
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