Degradation of mechanical properties and structurally-phase conditions of the main gas pipeline at long operation in the conditions of the North
Abstract
The results of a study of the structure and mechanical properties of low carbon and low alloyed steel of a pipe from a reserve stock and after long operation as a part of the Republics Sakha (Yakutia) main gas pipeline are presented. It is shown, that proceeding on nanometer scale level structurally degradation processes lead to degradation of structure and properties on micro-and macro-levels. It is shown, that АFМ is a unique method of quantitative definition of a roughness of phase components, characteristics of borders of grains and structure regularities of pearlit of ferritic-pearlitic steels which can be used for estimation of life of gas main pipes having operated for a long time. The calculation and experimental estimation of the strength properties of steels based on representations of physical metallurgy and on experimental data of structural researches is performed. The influence of structural factors on the strength properties of pipeline steel at long operation was analysed.
About the Authors
Aytalina Stepanovna Syromyatnikova
Larionov Institute of Physical and Technical Problems of the North SB RAS
Russian Federation
Russian Federation
Alexander Mikhailovich Bol’shakov
M.K.Ammosov North-Eastern Federal University
Russian Federation
Russian Federation
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Review
For citations:
Syromyatnikova A.S., Bol’shakov A.M. Degradation of mechanical properties and structurally-phase conditions of the main gas pipeline at long operation in the conditions of the North. Arctic and Subarctic Natural Resources. 2018;23(1):75-80. (In Russ.)
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