NDLI: Assessment of the In-Service Degradation of Pipeline Steel by Destructive and Nondestructive Methods

Content Provider	Springer Nature Link
Author	Mil’man, Yu. V. Nykyforchyn, H. M. Hrinkevych, K. E. Tsyrul’nyk, O. T. Tkachenko, I. V. Voloshyn, V. A. Mordel’, L. V.
Copyright Year	2012
Abstract	We analyze the influence of the long-term operation of API X52 pipeline steel on the degradation of its mechanical properties. It is established that, after operation for 30 years, its strength and plasticity characteristics decrease substantially, and the fatigue toughness decreases particularly abruptly, which is connected with the development of the damageability. We use indentation methods for comparing the states of the operated and nonoperated material. It is shown that the indices of spread of the results of measurements (the coefficient of variance) of the mechanical properties (hardness, wear, etc.) are more sensitive to the damage of the material in the initial state and the damage after operation than their averaged values. Some correlations between the Vickers hardness, cyclic hardness, strength, and plasticity of the steel are established.
Starting Page	583
Ending Page	589
Page Count	7
File Format	PDF
ISSN	1068820X
Journal	Materials Science
Volume Number	47
Issue Number	5
e-ISSN	1573885X
Language	English
Publisher	Springer US
Publisher Date	2012-05-17
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	in-service degradation pipeline steel diagnostics of the state of metal indentation methods Characterization and Evaluation of Materials Structural Materials Structural Mechanics Materials Science
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Condensed Matter Physics Materials Science Mechanical Engineering

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