Eliminate the contradiction between temperature and toughness by grain-boundary delamination in heterogeneous ultrafine-grained lamellar steels
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.
Authors
- Fuxing Yin (ORCID: https://orcid.org/0000-0002-5260-9091)
- Bo Yang (ORCID: https://orcid.org/0000-0002-4130-6212)
- Hui Yu (ORCID: https://orcid.org/0000-0001-7777-7940)
- Andrey Belyakov (ORCID: https://orcid.org/0000-0001-9003-9416)
- Tianlong Liu
- Baoxi Liu (ORCID: https://orcid.org/0000-0001-5370-7497)
- Zhichao Luo (ORCID: https://orcid.org/0000-0003-3437-2569)
- Liying Sun
Institutions
- Belgorod National Research University (RU)
- Hebei University of Technology (CN)
- Guangdong Academy of Sciences (CN)
- Institute of New Materials (CN)
Publication Details
- Journal
- Materials Research Letters
- Published
- 2024-09-05
- DOI
- https://doi.org/10.1080/21663831.2024.2399880
- Citations
- 15
- Primary Topic
- Microstructure and Mechanical Properties of Steels
- Type
- article
- Field-Weighted Citation Impact
- 3.19
Funders
- Natural Science Foundation of Hebei Province
- Guangdong Science and Technology Department
- Guangdong Academy of Sciences
- National High-tech Research and Development Program