Effect of Degree of Order on Hydrogen Diffusion in (Fe,Ni)₃V Alloys

Abstract:

The effect of hydrogen on the mechanical properties of disordered and ordered (Fe,Ni)₃V alloys has been investigated. The diffusion behaviors of hydrogen in the disordered and ordered (Fe,Ni)₃V alloys were reported. The results showed that the depth of intergranular (IG) fracture on a surface of tensile fracture of (Fe,Ni)₃V alloy increased linearly with increasing pre-charging temperature at the same pre-charging time. An apparent hydrogen diffusion coefficient was calculated by the time lag method. The apparent hydrogen diffusion coefficient in the disordered (Fe,Ni)₃V alloy was greater than that in the ordered (Fe,Ni)₃V alloy. The relationship between the apparent hydrogen diffusion coefficient and pre-charging temperature in (Fe,Ni)₃V alloy agreed with Arrhenius equation. The activation energies of apparent hydrogen diffusion in the disordered and ordered (Fe,Ni)₃V alloys were 34.6 kJ/mol and 42.2 kJ/mo1, respectively.

• Periodical: Materials Science Forum (Volume 849)
• Pages: 475-481
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.849.475
• Online since: March 2016
• Authors: Ye Xin Chen, Xi Bei Hou, Tao Chen
• Keywords: (Fe,Ni)₃V Alloy, Degree of Order, Hydrogen Diffusion

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