Effect of Operating Degradation in Arctic Conditions on Physical and Mechanical Properties of 09Mn2Si Pipeline Steel

被引：23

作者：

Panin, S. V. ^{[1
]}

Maruschak, P. O. ^{[2
]}

Vlasov, I. V. ^{[1
,3
]}

Syromyatnikova, A. S. ^{[4
]}

Bolshakov, A. M. ^{[4
]}

Berto, F. ^{[5
]}

Prentkovskis, O. ^{[6
]}

Ovechkin, B. B. ^{[3
]}

机构：

[1] Inst Strength Phys & Mat Sci SB RAS, 2-4 Pr Akad Skii, Tomsk 634055, Russia

[2] Ternopil Ivan Puluj Natl Tech Univ, 56 Ruska Str, UA-46001 Ternopol, Ukraine

[3] Natl Res Tomsk Polytech Univ, 30 Lenin Ave, Tomsk 634050, Russia

[4] VP Larionov Inst Phys Tech Problems North SB RAS, Oktyabrskaya 1 Str, Yakutsk 67798, Russia

[5] Norvegian Natl Tech Univ, NO-7491 Trondheim, Norway

[6] Vilnius Gediminas Tech Univ, 27 Plytines Str, LT-10105 Vilnius, Lithuania

来源：

PROCEEDINGS OF THE 16TH INTERNATIONAL SCIENTIFIC CONFERENCE RELIABILITY AND STATISTICS IN TRANSPORTATION AND COMMUNICATION (RELSTAT-2016) | 2017年 / 178卷

关键词：

impact toughness; 09Mn2Si pipe steel; degradation; embrittlement; main pipeline; GAS-PIPELINE; DIAGNOSTICS; ENVIRONMENT; HYDROGEN; FRACTURE; FATIGUE; SERVICE; NORTH; STATE; METAL;

D O I：

10.1016/j.proeng.2017.01.117

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The structure and mechanical properties of 09Mn2Si steel of the main pipeline "Kysyl-Syr-Mustakh-Yakutsk" cut out from a linear part fragment of the pipe with the outer diameter of 530 mm and a wall thickness of 7 mm at the region "Berge-Yakutsk" after 37 years of operation were investigated. It was revealed that values of the basic mechanical properties of the steel have not changed as compared with the emergency reserve one. In doing so the impact toughness was shown to be the most sensitive parameter indicating the degradation processes development. At testing temperature of 20 degrees C it has decreased by 1.48 times whereas at T = -70 degrees C by 2.42 times. One of the main reasons of the steel degradation is the strain aging which gives rise to the dislocation structure and microstructure modification that substantially impairs its resistance to brittle fracture. A scheme to characterize mechanical properties degradation of the 09Mn2Si steel in the structural state under investigation is suggested. (C) 2017 The Authors. Published by Elsevier

引用

页码：597 / 603

页数：7

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