The hydrogen embrittlement characteristics of a Mn-Al bainitic steel for railway crossings were studied by means of the slow strain rate test (SSRT), the delayed fracture test and X-ray diffraction (XRD) analysis. The binding energies and hydrogen diffusion barriers of an iron unit cell were tested separately with Al, Si and H, and were evaluated by the first principle calculation. The results showed that the hydrogen embrittlement decreased greatly with increased Al content. Microstructure examinations indicated that the content of retained austenite increased with increased Al content, which was as irreversible hydrogen traps and was not sensitive to hydrogen embrittlement. It is found that the characteristics of hydrogen embrittlement identified by SSRT and the delayed fracture test were different. From the first principle calculation, the binding energy of the iron lattice containing aluminum decreased less as compared to those of the cell containing silicon, but the diffusion barriers increased significantly.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Hydrogen embrittlement of a manganese-aluminum high-strength bainitic steel for railway crossings


    Additional title:

    Wasserstoffversprödung in einem hochfesten bainitischen Mangan-Aluminium-Stahl für Herzstücke von Eisenbahnweichen


    Contributors:
    Zheng, Chunlei (author) / Lv, Bo (author) / Chen, Cheng (author) / Yan, Zhigang (author) / Zhang, Fucheng (author) / Qian, Lihe (author)

    Published in:

    ISIJ International ; 51 , 10 ; 1749-1753


    Publication date :

    2011


    Size :

    5 Seiten, 6 Bilder, 3 Tabellen, 23 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    High-tension railway crossings

    Ulbricht, R. | Engineering Index Backfile | 1910


    Bainitic steels for railway applications

    Callender, William Robert | TIBKAT | 1983


    Amiesite paved railway crossings

    Mullen, C.A. | Engineering Index Backfile | 1928


    Highway-railway level crossings

    McKeown, H.A. | Engineering Index Backfile | 1930


    Hydrogen embrittlement of high strength pipeline steels

    Hardie, D. / Charles, E.A. / Lopez, A.H. | Tema Archive | 2006