Ductility loss in Hydrogen-charged Ductile Cast Iron

Hisao Matsunaga, Teruki Usuda, Keiji Yanase, Masahiro Endo

Research output: Contribution to conferencePaper

2 Citations (Scopus)

Abstract

Hydrogen-induced ductility loss in ductile cast iron (DCI) was studied by conducting a series of tensile tests with three different crosshead speeds. By utilizing the thermal desorption spectroscopy and the hydrogen microprint technique, it was found that most of the solute hydrogen was diffusive and mainly segregated at the graphite, graphite/matrix interface zone and the cementite of pearlite in the matrix. The fracture process of the non-charged specimen was dominated by the ductile dimple fracture, whereas that of the hydrogen-charged specimen became less ductile by accompanying the interconnecting cracks between the adjacent graphite nodules. Inside of the hydrogen-charged specimen, the interspaces generated by the interfacial debonding between graphite and matrix are filled with hydrogen gas in the early stage of the fracture process. In the subsequent fracture process, such a local hydrogen gas atmosphere coupled with a stress-induced diffusion attracts hydrogen to the crack tip, which results in a time-dependent ductility loss.

Original languageEnglish
Pages1372-1381
Number of pages10
Publication statusPublished - Jan 1 2013
Event13th International Conference on Fracture 2013, ICF 2013 - Beijing, China
Duration: Jun 16 2013Jun 21 2013

Other

Other13th International Conference on Fracture 2013, ICF 2013
CountryChina
CityBeijing
Period6/16/136/21/13

Fingerprint

ductility
Cast iron
Ductility
hydrogen
iron
Hydrogen
graphite
Graphite
matrix
crack
Thermal desorption spectroscopy
Ductile fracture
Pearlite
loss
Debonding
Gases
gas
Crack tips
solute
desorption

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology

Cite this

Matsunaga, H., Usuda, T., Yanase, K., & Endo, M. (2013). Ductility loss in Hydrogen-charged Ductile Cast Iron. 1372-1381. Paper presented at 13th International Conference on Fracture 2013, ICF 2013, Beijing, China.

Ductility loss in Hydrogen-charged Ductile Cast Iron. / Matsunaga, Hisao; Usuda, Teruki; Yanase, Keiji; Endo, Masahiro.

2013. 1372-1381 Paper presented at 13th International Conference on Fracture 2013, ICF 2013, Beijing, China.

Research output: Contribution to conferencePaper

Matsunaga, H, Usuda, T, Yanase, K & Endo, M 2013, 'Ductility loss in Hydrogen-charged Ductile Cast Iron' Paper presented at 13th International Conference on Fracture 2013, ICF 2013, Beijing, China, 6/16/13 - 6/21/13, pp. 1372-1381.
Matsunaga H, Usuda T, Yanase K, Endo M. Ductility loss in Hydrogen-charged Ductile Cast Iron. 2013. Paper presented at 13th International Conference on Fracture 2013, ICF 2013, Beijing, China.
Matsunaga, Hisao ; Usuda, Teruki ; Yanase, Keiji ; Endo, Masahiro. / Ductility loss in Hydrogen-charged Ductile Cast Iron. Paper presented at 13th International Conference on Fracture 2013, ICF 2013, Beijing, China.10 p.
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