J. Mater. Sci. Technol. ›› 2024, Vol. 194: 216-224.DOI: 10.1016/j.jmst.2024.02.010

• Research Article • Previous Articles     Next Articles

In-situ scanning Kelvin probe force microscopy on the diverse hydrogen trapping behaviours around incoherent NbC nanoprecipitates

Binglu Zhanga,b,1, Zhaoxiang Mac,1, Yuan Mad, Yongqing Chend, Baolong Jiange, Yu Jiad, Rongjian Shia, Lin Chenf, Yang He*, Lijie Qiaoa,b,*   

  1. aBeijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China;
    bCorrosion and Protection Center, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China;
    cCollege of Nuclear Equipment and Nuclear Engineering, Yantai University, Yantai 264005, China;
    dDepartment of Materials Science and Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
    eState Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University, Haikou 570228, China;
    fCollege of Safety and Ocean Engineering, China University of Petroleum (Beijing), Beijing 102249, China
  • Received:2023-11-01 Revised:2024-01-17 Accepted:2024-02-22 Published:2024-09-20 Online:2024-03-05
  • Contact: *E-mail addresses: yanghe@ustb.edu.cn (Y. He), lqiao@ustb.edu.cn (L. Qiao).
  • About author:1These authors contributed equally to this work.

Abstract: One of the most intriguing methods of mitigating the hydrogen embrittlement of steels entails nanoprecipitates that can trap H from enriching at vulnerable locations. However, controversial findings have been reported on whether the incoherent NbC precipitates trap hydrogen. Here, by using in-situ scanning Kelvin probe force microscopy (SKPFM), we reveal the dynamic interaction of H with the border area of incoherent NbC nanoprecipitates in steel. Results indicate that the interaction between H flux and the interfaces varies amongst different precipitates, implying that H-trapping behaviours of incoherent NbC precipitates could be intrinsically diverse. Potential origins underlying the distinct behaviours are analyzed.

Key words: Hydrogen embrittlement, Scanning Kelvin probe force microscopy (SKPFM), Carbide precipitates, TEM, High-strength low-alloy (HSLA) steels