University of Illinois Urbana-Champaign

Hydrogen induced shear localization of plastic flow in metals and alloys

Sofronis, Petros; Aravas, Nikolaos

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https://hdl.handle.net/2142/112619

Description

Title
Hydrogen induced shear localization of plastic flow in metals and alloys
Author(s)
  • Sofronis, Petros
  • Aravas, Nikolaos
Issue Date
1999-06
Keyword(s)
  • Hydrogen Induced Shear Localization
  • Plastic Flow
Abstract
It is well known that hydrogen enhanced localized plasticity (HELP) is a viable mechanism for hydrogen embrittlement supported by experimental observations. The objective of this work is to reveal the role of hydrogen in possibly localizing the macroscopic deformation into bands of intense shear from a solid mechanics point of view. The hydrogen effect on material deformation is modeled through the hydrogen induced volume dilatation and the reduction in the local flow stress upon hydrogen dissolution into the lattice. Hydrogen in reversible traps associated with the plastic deformation is always in local equilibrium with interstitial hydrogen that is also assumed to be always in equilibrium with local stress. The analysis of the plastic deformation and the conditions for localization are carried out in plane strain uniaxial tension. The localization criteria employed are those established by the work of Rice (1976) and Rudnicki and Rice (1975).
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
  • TAM R 911
  • 1999-6013
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/112619
Sponsor(s)/Grant Number(s)
Energy Department DEFGO2-91ER45439
Copyright and License Information
Copyright 1999 Board of Trustees of the University of Illinois

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Technical Reports - Theoretical and Applied Mechanics (TAM) PRIMARY
TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.