Microstructure and Impact Toughness of Offshore Steel

• Autorzy: Cheng T.-C. , Yu C. , Yang T.-C. , Huang C.-Y. , Lin H.-C. , Shiue R.-K.

Identyfikatory

DOI

10.24425/118924

• Języki publikacji: EN

Abstrakty

EN

This study focused on the effects of microstructures on the low-temperature impact toughness of directly water-quenched offshore steel. Martensite dominated the microstructure directly below the quenched surface. In contrast, mainly lower bainite, martensite, and low amount of ferrite were observed in the central region of the quenched specimen. The ductile to brittle transition temperature of tempered martensite was significantly lower than that of a bainite-dominated microstructure. It is found that low-angle boundaries within the bainite packets greatly impair the low-temperature impact toughness of the steel. The absence of high-angle boundaries in the lower bainite packets significantly deteriorates the low-temperature impact energy of offshore steel.

Słowa kluczowe

EN

low-temperature impact toughness; prior austenite grain size; hardenability; bainite

• 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: 2018
• Tom: Vol. 63, iss. 1
• Strony: 167--172
• Opis fizyczny: Bibliogr. 16 poz., rys.

Twórcy

autor

Cheng T.-C.

• National Taiwan University, Department of Materials Science and Engineering, Taipei 106, Taiwan

autor

Yu C.

• National Taiwan University, Department of Materials Science and Engineering, Taipei 106, Taiwan

autor

Yang T.-C.

• China Steel Corporation, Hsiao Kang, Kaohsiung 812, Taiwan

autor

Huang C.-Y.

• China Steel Corporation, Hsiao Kang, Kaohsiung 812, Taiwan

autor

Lin H.-C.

• National Taiwan University, Department of Materials Science and Engineering, Taipei 106, Taiwan

autor

Shiue R.-K.

• National Taiwan University, Department of Materials Science and Engineering, Taipei 106, Taiwan

Bibliografia

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).