Citation

Subbotin VA, Kolotilov YV, Ivashko SK, Smirnova VY. Polymer Science - Series D 2017; 10(3): 247-250.

Copyright

(Copyright © 2017)

DOI

10.1134/S1995421217030200

PMID

unavailable

Abstract

Steel failure is closely associated with the aging process, which consists in the diffusion motion of carbon atoms solved in a ferrite matrix to grain boundaries and the release of carbide particles on them. Steel aging is caused by the thermodynamic nonequilibrium of the initial state and the gradual approach to the state of structural equilibrium under conditions of sufficient diffusion mobility of carbon atoms. Aging promotes the initiation and growth of brittle cracks in steel. It is shown that the change in the strength properties of pipe steels in the process of operation calls for the corresponding methods of determining the lifetime of gas pipelines with consideration of the results of diagnostic examinations and the physico-mechanical properties of structural materials used for the construction and repair of gas pipelines. 2017, Pleiades Publishing

Keywords: Pipeline transportation

Language: en

Keywords

Gas pipelines; Pipelines; Nondestructive examination; Tensile testing; Carbides; Tensile strength; Impact strength; Carbon; Grain boundaries; Materials properties; Strength of materials