On the effect of hydrogen on plastic instabilities in metals

Y. Liang, P. Sofronis, N. Aravas

Research output: Contribution to journalArticlepeer-review


Experimental observations and theoretical calculations have demonstrated that hydrogen solute atoms increase the dislocation mobility in metals and alloys, thus promoting highly localized plastic processes which eventually lead to localized ductile rupture. While the underlying mechanism for hydrogen-enhanced dislocation mobility is well understood, little is known on how this mechanism acting at the microscale can lead to macroscopic plastic instability. In this paper, a theoretical investigation is carried out in a specimen under plane-strain tension in an effort to understand how hydrogen-induced softening and lattice dilatation at the microscale can lead to macroscopic i) shear localization (shear banding bifurcation) or ii) necking bifurcation.

Original languageEnglish (US)
Pages (from-to)2717-2730
Number of pages14
JournalActa Materialia
Issue number9
StatePublished - May 23 2003


  • Dislocation mobility
  • Finite element analysis
  • Hydrogen embrittlement
  • Necking
  • Shear bands

ASJC Scopus subject areas

  • General Materials Science
  • Electronic, Optical and Magnetic Materials
  • Metals and Alloys


Dive into the research topics of 'On the effect of hydrogen on plastic instabilities in metals'. Together they form a unique fingerprint.

Cite this