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Effect of hydrogen on fatigue crack propagation in vanadium

  • Mechanical Behaviour
  • Published:
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Abstract

The influence of hydrogen on fatigue crack propagation in unalloyed vanadium and several hydrogen-charged vanadium alloys has been investigated. The Paris-Erdogan equation,da/dN =C(Δ.K)m, was approximately obeyed for all alloys. Crack growth rates were lowest in vanadium and dilute vanadium-hydrogen alloys, and were not very sensitive to volume fraction of hydrides in more concentrated alloys. The crack growth exponent,m, is inversely proportional to the cyclic strain hardening rate,n′, and the rate constantC is inversely proportional to the square of the ultimate tensile stress, σUTS: Metallographic examination showed hydride reorientation and growth in the originally hydrided alloys. No stress-induced hydrides were observed in V-H solid-solution alloys. Fractures in hydrided materials exhibited cleavage-like features, while striations were noted in unalloyed vanadium and dilute solid-solution alloys.

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Authors and Affiliations

  1. Mechanical Engineering Department, The University of Manitoba, Winnipeg 19, Manitoba, Canada

    D. W. Chung (Research Associate)

  2. Materials Engineering Department, Rensselaer Polytechnic Institute, 12181, Troy, NY

    N. S. Stoloff (Professor)

Authors
  1. D. W. Chung
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  2. N. S. Stoloff
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Chung, D.W., Stoloff, N.S. Effect of hydrogen on fatigue crack propagation in vanadium. Metall Trans A 9, 71–78 (1978). https://doi.org/10.1007/BF02647173

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  • DOI: https://doi.org/10.1007/BF02647173

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