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Corrosion and corrosion-fatigue behavior of IN625 Weld Surfaced 3.25 Nickel Steel

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Journal of Materials for Energy Systems

Abstract

The corrosion and corrosion-fatigue behaviors of INCONEL 625 weld metal surfaced onto 3.25 pct nickel steel using the gas metal arc welding-pulsed arc process are presented. General, crevice, and bent-beam stress corrosion studies were performed. Completely reversed bending corrosion-fatigue and corrosion fatigue crack growth behaviors were also evaluated. The sea water corrosion resistance of the surface weld metal was equivalent to wrought base metal at levels of iron up to 9 pct, provided the molybdenum concentration was greater than 8 pct. Stress relief heat treatment did not degrade corrosion resistance properties. The corrosion fatigue strength of the surface weld metal at 108 cycles was found to be 103.4 MPa (15 ksi) which is lower than values reported for multiple pass INCONEL 625 welds, but is significantly higher than the corrosion fatigue strength of 3.25 nickel steel. Fatigue crack growth rates for the surface weld metal were found to be higher than the wrought INCONEL 625 base metal and the steel. Stress relief heat treatment does not alter corrosion fatigue crack growth rates of the clad 1N-625 surface weld metal.

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Authors and Affiliations

  1. Department of Mechanical Engineering, United States Naval Academy, 21402, Annapolis, MD

    D. F. Hasson

  2. Metals Welding Division, David W. Taylor Ship Research and Development Center, 21402, Annapolis, MD

    C. Zanis, L. Aprigliano & C. Fraser

Authors
  1. D. F. Hasson
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  2. C. Zanis
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  3. L. Aprigliano
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  4. C. Fraser
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Hasson, D.F., Zanis, C., Aprigliano, L. et al. Corrosion and corrosion-fatigue behavior of IN625 Weld Surfaced 3.25 Nickel Steel. JMES 7, 256–264 (1985). https://doi.org/10.1007/BF02833389

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