Effect of Hydrogen on Tensile Properties of a Ductile Cast Iron

Hisao Matsunaga, Kenshin Matsuno, Katsuya Hayashida

Research output: Chapter in Book/Report/Conference proceedingChapter


Effect of hydrogen-charging and strain rate was investigated on the tensile properties of a ductile cast iron having the microstructure comprised of ferrite/pearlite matrix and spheroidal graphites. Hydrogen-charging accelerated the process of crack growth from graphite. The crack growth acceleration resulted in a marked decrease in reduction of area at final fracture (RA). In the uncharged specimens RA was nearly constant with strain rate, whereas in the hydrogen-charged specimens RA was gradually decreased with a decrease in strain rate. Thermal desorption spectroscopy and hydrogen microprint technique revealed that in the hydrogen-charged specimen most of solute hydrogen was diffusive and mainly segregated at graphite, graphite/matrix interface zone and pearlite. Considering all the obtained results together, the hydrogen-induced degradation was attributed to a combination of the following three factors: (i) hydrogen supply to the crack tip from the graphite/matrix interface zone, (ii) hydrogen-enhanced pearlite cracking and (iii) successive hydrogen emission from the graphite and additional supply to the crack tip.

Original languageEnglish
Title of host publicationSupplemental Proceedings
Subtitle of host publicationGeneral Paper Selections
PublisherJohn Wiley and Sons Inc.
Number of pages8
ISBN (Electronic)9781118062173
ISBN (Print)9781118029473
Publication statusPublished - May 3 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Engineering
  • General Materials Science


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