Hydrogen embrittlement behavior of Inconel 718 alloy at room temperature

Xinfeng Li, Jin Zhang, Eiji Akiyama, Qinqin Fu, Qizhen Li

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Hydrogen embrittlement of Inconel 718 alloy was investigated. Multi-scale observation technique were employed, comprising slow strain rate tensile tests, scanning electron microscopy and transmission electron microscopy analysis. The results demonstrate that hydrogen charging deteriorates mechanical properties of the alloy. Inconel 718 alloy shows partial Portevin-Le Chatelier (PLC) effect at room temperature when hydrogen charging current density is 220 mA cm−2 and 590 mA cm−2. Moreover, plastic deformation features with dislocation cells are detected in hydrogen-induced brittle zone. Thus, it is concluded that dragging effect of hydrogen atoms on dislocations contributes to PLC effect.

Original languageEnglish
Pages (from-to)499-502
Number of pages4
JournalJournal of Materials Science and Technology
Volume35
Issue number4
DOIs
Publication statusPublished - 2019 Apr

Keywords

  • Embrittlement
  • Hydrogen in metals
  • Inconel 718 alloy
  • Portevin-Le Chatelier effect

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Polymers and Plastics
  • Metals and Alloys
  • Materials Chemistry

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