Eliminate the contradiction between temperature and toughness by grain-boundary delamination in heterogeneous ultrafine-grained lamellar steels

Bo Yang; Fuxing Yin; Baoxi Liu; Liying Sun; Tianlong Liu; Hui Yu; Andrey Belyakov; Zhichao Luo

doi:10.1080/21663831.2024.2399880

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Eliminate the contradiction between temperature and toughness by grain-boundary delamination in heterogeneous ultrafine-grained lamellar steels

Original Report | 更新时间：2026-08-19

- Eliminate the contradiction between temperature and toughness by grain-boundary delamination in heterogeneous ultrafine-grained lamellar steels
- Eliminate the contradiction between temperature and toughness by grain-boundary delamination in heterogeneous ultrafine-grained lamellar steels
- 材料研究快报（英文） 2024年12卷第12期页码：886-894
- 作者机构：
  
  1. a Tianjin Key Laboratory of Materials Laminating Fabrication and Interfacial Controlling Technology School of Materials Science and Engineering Hebei University of Technology Tianjin People’s Republic of China
  2. a Tianjin Key Laboratory of Materials Laminating Fabrication and Interfacial Controlling Technology School of Materials Science and Engineering Hebei University of Technology
  3. b Guangdong Academy of Sciences Guangdong Provincial Key Laboratory of Metal Toughening Technology and Application Institute of New Materials
  4. c Belgorod State University
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2024.2399880
  中图分类号：
- 网络首发：2024-09-05，
  
  纸质出版：2024
- 稿件说明：
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Bo Yang, Fuxing Yin, Baoxi Liu, 等. Eliminate the contradiction between temperature and toughness by grain-boundary delamination in heterogeneous ultrafine-grained lamellar steels[J]. 材料研究快报（英文）, 2024,12(12):886-894.

Bo Yang, Fuxing Yin, Baoxi Liu, et al. Eliminate the contradiction between temperature and toughness by grain-boundary delamination in heterogeneous ultrafine-grained lamellar steels[J]. Materials Research Letters, 2024, 12(12): 886-894.
Bo Yang, Fuxing Yin, Baoxi Liu, 等. Eliminate the contradiction between temperature and toughness by grain-boundary delamination in heterogeneous ultrafine-grained lamellar steels[J]. 材料研究快报（英文）, 2024,12(12):886-894. DOI： 10.1080/21663831.2024.2399880.

Bo Yang, Fuxing Yin, Baoxi Liu, et al. Eliminate the contradiction between temperature and toughness by grain-boundary delamination in heterogeneous ultrafine-grained lamellar steels[J]. Materials Research Letters, 2024, 12(12): 886-894. DOI： 10.1080/21663831.2024.2399880.

摘要

Abstract

Heterostructured ferritic steels with bimodal-grained lamellar (BG-L) and ultrafine-grained lamellar (UFG-L) microstructure were prepared through a warm deformation process. The BG-L steel exhibits enhanced mechanical properties compared to conventional quenched and tempered (QT) steel. While the UFG-L steel demonstrates an outstanding combination of strength

ductility

and toughness. Furthermore

the UFG-L steels exhibit no ductile-to-brittle transition (DBT) from room temperature (RT) to liquid nitrogen temperature (LNT) and the Charpy impact energy remains as high as 314 J at LNT. The enhanced toughness at LNT can be attributed to the crack-arrester mechanism caused by grain-boundary delamination.

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