On the formation and nature of quasi-cleavage fracture surfaces in hydrogen embrittled steels

May L. Martin, Jamey A. Fenske, Grace S. Liu, Petros Sofronis, Ian M. Robertson

Research output: Contribution to journalArticle

164 Citations (Scopus)

Abstract

Quasi-cleavage, a common feature of hydrogen-induced fracture surfaces, is generally taken as being cleavage-like but not along a known cleavage plane. Despite the frequency with which this surface is observed, the relationship to the underlying microstructure remains unknown. Through a combination of topographical reconstruction of secondary electron microscope fractographs and a transmission electron microscopy study of the microstructure from site-specific locations, it will be shown that the features on quasi-cleavage surfaces are ridges that can be correlated with sub-surface intense and highly localized deformation bands. It will be demonstrated that the fracture surface arises from the growth and coalescence of voids that initiate at and extend along slip band intersections. This mechanism and process is fully consistent with hydrogen enhancing and localizing plastic processes.

Original languageEnglish
Pages (from-to)1601-1606
Number of pages6
JournalActa Materialia
Volume59
Issue number4
DOIs
Publication statusPublished - Feb 1 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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