Effects of the Coiling Temperature and Anisotropy on the Tensile Properties of High-Strength API X70 Linepipe Steel

• Autorzy: Oh Dong-Kyu , Shin Seung-Hyeok , Lee Sang-Min , Hwang Byoungchul

Identyfikatory

DOI

10.24425/amm.2022.141079

• Języki publikacji: EN

Abstrakty

EN

In this study, the effect of the coiling temperature on the tensile properties of API X70 linepipe steel plates is investigated in terms of the microstructure and related anisotropy. Two coiling temperatures are selected to control the microstructure and tensile properties. The API X70 linepipe steels consist mostly of ferritic microstructures such as polygonal ferrite, acicular ferrite, granular bainite, and pearlite irrespective of the coiling temperature. In order to evaluate the anisotropy in the tensile properties, tensile tests in various directions, in this case 0° (rolling direction), 30°, 45° (diagonal direction), 60°, and 90° (transverse direction) are conducted. As the higher coiling temperature, the larger amount of pearlite is formed, resulting in higher strength and better deformability. The steel has higher ductility and lower strength in the rolling direction than in the transverse direction due to the development of γ-fiber, particularly the {111}<112> texture.

Słowa kluczowe

EN

linepipe steels; anisotropy; tensile property; texture; microstructure

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2022
• Tom: Vol. 67, iss. 4
• Strony: 1487--1490
• Opis fizyczny: Bibliogr. 27 poz., fot., rys., tab.

Twórcy

autor

Oh Dong-Kyu

• Seoul National University of Science and Technology, Department of Materials Science and Engineering, Seoul, 01811, Republic of Korea

• https://orcid.org/0000-0001-9816-9442

autor

Shin Seung-Hyeok

• Seoul National University of Science and Technology, Department of Materials Science and Engineering, Seoul, 01811, Republic of Korea

• https://orcid.org/0000-0002-0458-5806

autor

Lee Sang-Min

• Hyundai Steel Company, Dangjin-Si, Chungnam, 31719, Republic of Korea

• https://orcid.org/0000-0002-7686-0459

autor

Hwang Byoungchul

• Seoul National University of Science and Technology, Department of Materials Science and Engineering, Seoul, 01811, Republic of Korea

• https://orcid.org/0000-0001-6330-4747

Bibliografia

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Uwagi

1. This study was supported by the Technology Innovation Program (Grant No. 20016064) funded by the Ministry of Trade, Industry and Energy (MOTIE), South Korea.

2. Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).