Grain-boundary chemistry, fracture mode and ductility comparison for iron and nickel tested at cathodic potentials

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The fracture mode of iron and nickel tested at equal cathodic current densities was found to be a function of the grain boundary sulfur concentration with iron and nickel having transitions at 0.12 and 0.09 monolayers of sulfur, respectively. The reduction of area of iron and nickel tested at equal cathodic current densities also decreased similarly with increasing grain boundary sulfur concentrations. The similarity in the effect of hydrogen and sulfur on iron and nickel can be explained by their role in intergranular decohesion. However, the different hydrogen transport rates in these materials suggests a rate controlling HAR which is ... continued below

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Pages: 9

Creation Information

Jones, R.H.; Bruemmer, S.M.; Thomas, M.T. & Baer, D.R. August 1, 1980.

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  • Pacific Northwest Laboratory
    Publisher Info: Battelle Pacific Northwest Labs., Richland, WA (USA)
    Place of Publication: Richland, Washington

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The fracture mode of iron and nickel tested at equal cathodic current densities was found to be a function of the grain boundary sulfur concentration with iron and nickel having transitions at 0.12 and 0.09 monolayers of sulfur, respectively. The reduction of area of iron and nickel tested at equal cathodic current densities also decreased similarly with increasing grain boundary sulfur concentrations. The similarity in the effect of hydrogen and sulfur on iron and nickel can be explained by their role in intergranular decohesion. However, the different hydrogen transport rates in these materials suggests a rate controlling HAR which is altered similarly by sulfur in iron and nickel. This process requires that hydrogen transport by either dislocations or bulk diffusion is sufficiently fast that permeation is surface controlled.

Physical Description

Pages: 9

Notes

NTIS, PC A02/MF A01.

Source

  • International conference on effects of hydrogen on materials, Jackson Lake Lodge, WY, USA, 26 Aug 1980

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  • Other: DE82008604
  • Report No.: PNL-SA-8481
  • Report No.: CONF-800850-7
  • Grant Number: AC06-76RL01830
  • Office of Scientific & Technical Information Report Number: 5510271
  • Archival Resource Key: ark:/67531/metadc1093471

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Office of Scientific & Technical Information Technical Reports

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  • August 1, 1980

Added to The UNT Digital Library

  • Feb. 10, 2018, 10:06 p.m.

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  • April 19, 2018, 7:14 p.m.

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Jones, R.H.; Bruemmer, S.M.; Thomas, M.T. & Baer, D.R. Grain-boundary chemistry, fracture mode and ductility comparison for iron and nickel tested at cathodic potentials, article, August 1, 1980; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc1093471/: accessed September 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.