Effect of hydrogen on tensile properties of a ductile cast iron

Hisao Matsunaga, Kenshin Matsuno, Katsuya Hayashida

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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 publicationTMS 2011 - 140th Annual Meeting and Exhibition, Supplemental Proceedings
Pages447-454
Number of pages8
Publication statusPublished - Jul 27 2011
Externally publishedYes
EventTMS 2011 - 140th Annual Meeting and Exhibition - San Diego, CA, United States
Duration: Feb 27 2011Mar 3 2011

Publication series

NameTMS Annual Meeting
Volume3

Other

OtherTMS 2011 - 140th Annual Meeting and Exhibition
CountryUnited States
CitySan Diego, CA
Period2/27/113/3/11

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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  • Cite this

    Matsunaga, H., Matsuno, K., & Hayashida, K. (2011). Effect of hydrogen on tensile properties of a ductile cast iron. In TMS 2011 - 140th Annual Meeting and Exhibition, Supplemental Proceedings (pp. 447-454). (TMS Annual Meeting; Vol. 3).