Influence of long-term operation on structure, fatigue durability and impact toughness of 09Mn2Si pipe steel

Influence of long-term operation on structure, fatigue durability and impact toughness of 09Mn2Si pipe steel

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Parent link:	Procedia Structural Integrity Vol. 5 : 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal.— 2017.— [P. 401-408]
Tác giả của công ty:	Национальный исследовательский Томский политехнический университет (ТПУ) Институт физики высоких технологий (ИФВТ) Кафедра материаловедения в машиностроении (ММС)
Tác giả khác:	Panin S. V. Sergey Viktorovich, Vlasov I. V. Ilya Viktorovich, Marushchak P. O. Pavel Orestovich, Eremin A. V. Alexandr Vyacheslavovich, Byakov A. V. Anton Viktorovich, Berto F. Filippo, Vinogradov A. Y. Aleksey Yurjevich, Syromyatnikova A. S. Aytalina Stepanovna, Stankevich R. V. Roman Vladimirovich
Tóm tắt:	Title screen A comprehensive study of the structure, mechanical properties including impact toughness of 09Mn2Si steel used for constructing main gas pipeline” Mastakh-Berge-Yakutsk” after 37 years of operation was carried out. A comparative analysis of the results obtained for the emergency stock steel was conducted. It is shown that long-term operation does not give rise to a substantial redistribution of cementite. Deformation aging is slightly expressed and is manifested through the precipitation of finely dispersed carbides in the grain bulk. The revealed structure degradation does not practically make sense under static tension or hardness measurement. At the same time, under cyclic testing the microstructure degradation being occurred during long-term operation results in fatigue lifetime decrease especially at the stage of crack initiation. The most pronounced manifestation of structure changes is related to decreasing impact toughness of 09Mn2Si steel which reaches ~ 2 times under negative temperatures. The reasons and mechanisms of the observed phenomena are discussed. Режим доступа: по договору с организацией-держателем ресурса
Được phát hành:	2017
Những chủ đề:	электронный ресурс труды учёных ТПУ microstructure degradation embrittlement impact toughness fatigue durability трубы усталостная прочность ударопрочность стали
Truy cập trực tuyến:	https://doi.org/10.1016/j.prostr.2017.07.188
Định dạng:	Điện tử Chương của sách
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=657198

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