Effects of axial magnetic field on Fe-Ni interface macrosegregation of 9%Ni steel welds filled with Ni-based alloy

Guo, Wei; Cai, Yan; Wang, Boshi; Zhang, Bin; Mu, Weidong

doi:10.1016/j.jmatprotec.2023.117889

Journal of Materials Processing Technology

2023

DOI: 10.1016/j.jmatprotec.2023.117889

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Effects of axial magnetic field on Fe-Ni interface macrosegregation of 9%Ni steel welds filled with Ni-based alloy

Wei Guo

Yan Cai

Boshi Wang

et al.

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2024

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Cited by 3 publications

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“…[10,11] Compared to medium Mn steels that exhibit weak TRIP effect due to the RA formed by C and Mn partitioning, Fe-Ni martensitic steels, particularly ≈9 wt% Ni-containing steel, has a remarkable low-temperature toughness of 200 J at À196 °C. [12] Therefore, Ni-containing steels are widely used cryogenic engineering materials due to the thermally stable Ni-rich RA, which plays a role in improving the cryogenic TRIP effect. [13,14] Stable RA can be formed in Ni-containing steels through the quenching-tempering (QT) and quenchinglamellarizing-tempering (QLT) processes.…”

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confidence: 99%

Improving the Cryogenic Strength–Ductility–Toughness of Multi‐Alloy Steel by Optimizing the Feature of Retained Austenite

Zhou,

Ye,

Zhao

et al. 2024

steel research int.

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There is a general inverse relationship between strength and toughness in low‐carbon steels. The transformation‐induced plasticity (TRIP) effect of retained austenite (RA) can help overcome this contradiction by providing strain hardening and transformation toughening during service. In this study, the effect of RA on the microstructure evolution, cryogenic mechanical properties, and fracture behavior of multi‐alloyed Ni‐containing steel is explored. Two well‐established techniques are employed to tailor the RA: quenching–intercritical tempering (QIT) and quenching–lamellarizing–intercritical tempering (QLIT). QLIT steel has a 25.1 vol% RA fraction, which is twice that of QIT steel, and offers exceptional stability at –196 °C. As a result, QLIT steel exhibits superior cryogenic mechanical properties in comparison to QIT steel, including a 6.9% increase in yield strength up to 1228 MPa, a 36.6% increase in elongation up to 33.2%, and a 147.4% increase in impact energy up to 193 J. These improvements are due to the higher fraction of RA transformed into the martensite during tensile deformation, resulting in an enhanced TRIP effect and increased work‐hardening rate. The exceptional stability of the RA also provides more sustainable TRIP toughening during cryogenic impact deformation, which helps to arrest crack propagation.

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confidence: 99%

Improving the Cryogenic Strength–Ductility–Toughness of Multi‐Alloy Steel by Optimizing the Feature of Retained Austenite

Zhou,

Ye,

Zhao

et al. 2024

steel research int.

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Effect of Gradient Microstructure and Strength Mismatch on Cryogenic Toughness of Fe-Ni Fusion Boundary

Guo,

Cai,

Zou

et al. 2024

J. of Materi Eng and Perform

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Microstructure and mechanical properties of 9 % nickel steel welded joints using a CoCrNi filler wire for cryogenic storage tanks

Liu,

Ao,

Xue

et al. 2024

International Journal of Pressure Vessels and Piping

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Effects of axial magnetic field on Fe-Ni interface macrosegregation of 9%Ni steel welds filled with Ni-based alloy

Cited by 3 publications

References 22 publications

Improving the Cryogenic Strength–Ductility–Toughness of Multi‐Alloy Steel by Optimizing the Feature of Retained Austenite

Improving the Cryogenic Strength–Ductility–Toughness of Multi‐Alloy Steel by Optimizing the Feature of Retained Austenite

Effect of Gradient Microstructure and Strength Mismatch on Cryogenic Toughness of Fe-Ni Fusion Boundary

Microstructure and mechanical properties of 9 % nickel steel welded joints using a CoCrNi filler wire for cryogenic storage tanks

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