A novel strategy creating serrated grain boundaries to improve ductility in a Fe–Cr–Al alloy

Luo, Wei; Liu, Zhe; Zuo, Ding; Wang, Xiaoshuai; Tu, Yanni; Zhang, Ruiqian; Liu, Huiqun

doi:10.1016/j.msea.2023.145789

Materials Science and Engineering: A

2023

DOI: 10.1016/j.msea.2023.145789

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A novel strategy creating serrated grain boundaries to improve ductility in a Fe–Cr–Al alloy

Wei Luo,

Zhe Liu,

Ding Zuo

et al.

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Cited by 3 publications

References 51 publications

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Achieving superior resistance to high–temperature creep in laser powder bed fusion of Inconel 718 via grain boundaries serration

Shi,

Zhang,

Dong

et al. 2024

Journal of Materials Research and Technology

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Achieving superior resistance to high–temperature creep in laser powder bed fusion of Inconel 718 via grain boundaries serration

Shi,

Zhang,

Dong

et al. 2024

Journal of Materials Research and Technology

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Serrated grain boundary formation and its effect on the hydrogen embrittlement of Fe-Ni based alloy

Hu,

Zhao,

Song

et al. 2025

Materials Science and Engineering: A

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Effect of Deformation-induced <i>α</i>’-martensite and Serrated Grain Boundaries on the Deformation and Fracture Behavior of 201 Austenitic Stainless Steel at Low Temperature

Khanh,

Quyen

2024

ISIJ Int.

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This study focuses on the fracture mode of 201 austenitic steel at room temperature (RT) and at − 40°C for one hour and three hours. The results reveal that at room temperature, the fracture is dominated by ductile behavior. At − 40°C, the fracture mode is a mix of ductile and brittle behavior. Type 201 austenitic stainless steel has a low stacking fault energy value (about 16 mJ.m − 2 at RT), leading to the activation of the transformation-induced plasticity (TRIP) effect. When the sample is soaked at − 40°C for three hours, deformation-induced martensite transition (DIMT) formation with the volume fraction rises significantly to 19.9%. At − 40°C for 3 hours, the alloy's impact energy absorption is reduced by 39%. The interaction of deformed austenite grains with previous austenite grain boundaries results in the formation of serrated grain boundaries in samples soaked at − 40°C. Serrated grain boundaries prevent crack propagation and reduce crack expansion at the grain boundary during the fracture of this alloy. The width of the crack at serrated grain boundaries is 38% less than that of the straight grain boundary.

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A novel strategy creating serrated grain boundaries to improve ductility in a Fe–Cr–Al alloy

Cited by 3 publications

References 51 publications

Achieving superior resistance to high–temperature creep in laser powder bed fusion of Inconel 718 via grain boundaries serration

Achieving superior resistance to high–temperature creep in laser powder bed fusion of Inconel 718 via grain boundaries serration

Serrated grain boundary formation and its effect on the hydrogen embrittlement of Fe-Ni based alloy

Effect of Deformation-induced <i>α</i>’-martensite and Serrated Grain Boundaries on the Deformation and Fracture Behavior of 201 Austenitic Stainless Steel at Low Temperature

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