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Destructive and Ultrasonic Investigations of Damage Development in Metallic Materials

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Abstract:

Damage development due to creep under uniaxial tension at elevated temperatures is assessed using destructive and non-destructive methods in steels, commonly used in power plants or chemical industry, and in aluminium alloy used in aircrafts for responsible elements. The results obtained using two different destructive methods for assessments of damage development are critically discussed. In the first method the specimens of steel after different amounts of creep prestraining were stretched up to failure and variations of the selected tension parameters were taken into account for damage identification. In the second one, a damage degree was evaluated by studying variations of an initial yield locus position in the stress space and by determination of the yield loci dimensions. The ultrasonic investigations were selected as the non-destructive method for damage development evaluation.

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Periodical:

Key Engineering Materials (Volumes 340-341)

Pages:

229-234

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.340-341.229

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Online since:

June 2007

Authors:

Zbigniew L. Kowalewski, Sławomir Mackiewicz, Jacek Szelażek

Keywords:

Creep, Damage, Mechanical Parameters, Ultrasound (US), Yield Surface

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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