Improvement of mechanical properties and low-temperature fracture characteristics of pipe steel

Improvement of mechanical properties and low-temperature fracture characteristics of pipe steel

Détails bibliographiques
Parent link:AIP Conference Proceedings
Vol. 2051 : Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2018 (AMHS’18).— 2018.— [020061, 5 p.]
Auteur principal: Derevyagina L. S. Lyudmila
Collectivité auteur: Национальный исследовательский Томский политехнический университет Инженерная школа новых производственных технологий Отделение материаловедения
Autres auteurs: Gordienko A. I. Antonina Ildarovna
Résumé:Title screen
The paper reports the results of the evaluation of mechanical properties and fracture analysis of low carbon steel 10Mn2VNbAl subjected to different thermomechanical processing modes. Heat treatment by austenitization and subsequent accelerated oil cooling (mode I) provide an increase in the yield strength from 380 to 1050 MPa and tensile strength from 650 to 1290?MPa. However, the ductility and impact toughness of the steel sharply decrease. As a result, fracture occurs by a brittle micromechanism through transgranular cleavage in the whole temperature range of impact testing. Additional annealing leads to a decrease in the yield strength and tensile strength to 790 and 855 MPa, respectively, as compared to processing mode I, but improves the low-temperature characteristics of impact toughness. The ductile-brittle transition temperature TDB decreases to a negative temperature of ?60°C (in the initial state TDB = ?32°C). An optimal combination of the strength properties and impact toughness was achieved after helical rolling of the steel. The tensile strength increased up to 770?MPa, the impact toughness rose by a factor of 13 at the test temperature T = ?70°C, as compared to the initial state of the steel, and TDB decreased to a temperature range below ?70°C. The structural factors governing the mechanical properties and cold resistance of the studied steel are discussed.
Режим доступа: по договору с организацией-держателем ресурса
Langue:anglais
Publié: 2018
Sujets:
электронный ресурс
труды учёных ТПУ
трубная сталь
механические свойства
разрушения
Accès en ligne:https://doi.org/10.1063/1.5083304
Format: Électronique Chapitre de livre
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664852

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