Abstract
The detection, characterization and eyaluation of flaws that are crack-like, in thick weldments of pressure vessels, are important, Usually this work is performed through non-destructive evaluation (NDE). Volumetric NDE techniques use the standard references to provide an approximate assessment, but specimens with natural flaws can give more accurate reference data in accordance with actural situations. The present research focuses attention on: (i) a methodology to generate definite-sized and oriented cracks; (ii) the effect of new material used to introduce cracks on the microstructure and mechanical property; and (iii) characterization of cracks. 20 and 125 mm thick weldments of carbon-manganese pressure vessel steel (SA-299/ASTM standard) were provided for the investigation. This paper discusses both the use of an innovative technique to generate cracks in weldments and also the crack characterization by NDE.
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