Hydrogen-induced cracking behaviors of Incoloy alloy 825

Yong-jin Yang, Ke-wei Gao, Chang-feng Chen

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    Yong-jin Yang, Ke-wei Gao, and Chang-feng Chen, Hydrogen-induced cracking behaviors of Incoloy alloy 825, Int. J. Miner. Metall. Mater., 17(2010), No. 1, pp.58-62. https://dx.doi.org/10.1007/s12613-010-0110-5
    Yong-jin Yang, Ke-wei Gao, and Chang-feng Chen, Hydrogen-induced cracking behaviors of Incoloy alloy 825, Int. J. Miner. Metall. Mater., 17(2010), No. 1, pp.58-62. https://dx.doi.org/10.1007/s12613-010-0110-5
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    Hydrogen-induced cracking behaviors of Incoloy alloy 825

    • School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    • Department of Materials Science and Technology, China University of Petroleum, Beijing, 102249, China

      通信作者:

      Ke-wei Gao E-mail: kwgao@mater.ustb.edu.cn

    中文摘要

    The effect of hydrogen on the fracture behaviors of Incoloy alloy 825 was investigated by means of slow strain rate testing (SSRT). Hydrogen was introduced into the sample by electrochemical charging. The results show that surface microcracks form gradually during aging at room temperature when desorption of hydrogen takes place after hydrogen charging at a current density of 5 mA/cm2 for 24 h. SSRT shows that the increase of ductility loss is significantly obvious as the hydrogen charging current density increases. Scanning electron microscopy (SEM) images reveal ductile fracture in the pre-charged sample with low current densities, while the fracture includes small quasi-cleavage regions and tends to be brittle fracture as the hydrogen charging current density increases to 5 mA/cm2.

     

    Hydrogen-induced cracking behaviors of Incoloy alloy 825

    Author Affilications

      • School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China

      • Department of Materials Science and Technology, China University of Petroleum, Beijing, 102249, China

    • Received: 24 December 2008; Revised: 31 January 2009; Accepted: 09 February 2009;
    The effect of hydrogen on the fracture behaviors of Incoloy alloy 825 was investigated by means of slow strain rate testing (SSRT). Hydrogen was introduced into the sample by electrochemical charging. The results show that surface microcracks form gradually during aging at room temperature when desorption of hydrogen takes place after hydrogen charging at a current density of 5 mA/cm2 for 24 h. SSRT shows that the increase of ductility loss is significantly obvious as the hydrogen charging current density increases. Scanning electron microscopy (SEM) images reveal ductile fracture in the pre-charged sample with low current densities, while the fracture includes small quasi-cleavage regions and tends to be brittle fracture as the hydrogen charging current density increases to 5 mA/cm2.

     

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