Hydrogen induced shear localization of the plastic flow in metals and alloys

P. Sofronis, Y. Liang, N. Aravas

Research output: Contribution to journalArticle

179 Citations (Scopus)

Abstract

Hydrogen enhanced localized plasticity (HELP) is a viable mechanism for hydrogen embrittlement supported by experimental observations. According to the HELP mechanism, hydrogen induced premature failures result from hydrogen induced plastic instability which leads to hydrogen assisted localized ductile processes. The objective of this work is to reveal the role of hydrogen in possibly localizing the macroscopic deformation into bands of intense shear using solid mechanics methodology. 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 assumed to reside in both normal interstitial lattice sites (NILS) and reversible traps associated with the plastic deformation. The analysis of the plastic deformation and the conditions for plastic flow localization are carried out in plane strain uniaxial tension. For a given initial hydrogen concentration in the unstressed specimen, a critical macroscopic strain is identified at which shear localization commences.

Original languageEnglish
Pages (from-to)857-872
Number of pages16
JournalEuropean Journal of Mechanics, A/Solids
Volume20
Issue number6
DOIs
Publication statusPublished - Nov 1 2001
Externally publishedYes

Fingerprint

plastic flow
Plastic flow
Hydrogen
Metals
shear
hydrogen
metals
plastic properties
plastic deformation
Plasticity
Plastic deformation
solid mechanics
hydrogen embrittlement
Hydrogen embrittlement
plane strain
Mechanics
dissolving
interstitials
Dissolution
plastics

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Physics and Astronomy(all)

Cite this

Hydrogen induced shear localization of the plastic flow in metals and alloys. / Sofronis, P.; Liang, Y.; Aravas, N.

In: European Journal of Mechanics, A/Solids, Vol. 20, No. 6, 01.11.2001, p. 857-872.

Research output: Contribution to journalArticle

@article{d9082c56a6b74ccb955d1276b891c012,
title = "Hydrogen induced shear localization of the plastic flow in metals and alloys",
abstract = "Hydrogen enhanced localized plasticity (HELP) is a viable mechanism for hydrogen embrittlement supported by experimental observations. According to the HELP mechanism, hydrogen induced premature failures result from hydrogen induced plastic instability which leads to hydrogen assisted localized ductile processes. The objective of this work is to reveal the role of hydrogen in possibly localizing the macroscopic deformation into bands of intense shear using solid mechanics methodology. 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 assumed to reside in both normal interstitial lattice sites (NILS) and reversible traps associated with the plastic deformation. The analysis of the plastic deformation and the conditions for plastic flow localization are carried out in plane strain uniaxial tension. For a given initial hydrogen concentration in the unstressed specimen, a critical macroscopic strain is identified at which shear localization commences.",
author = "P. Sofronis and Y. Liang and N. Aravas",
year = "2001",
month = "11",
day = "1",
doi = "10.1016/S0997-7538(01)01179-2",
language = "English",
volume = "20",
pages = "857--872",
journal = "European Journal of Mechanics, A/Solids",
issn = "0997-7538",
publisher = "Elsevier BV",
number = "6",

}

TY - JOUR

T1 - Hydrogen induced shear localization of the plastic flow in metals and alloys

AU - Sofronis, P.

AU - Liang, Y.

AU - Aravas, N.

PY - 2001/11/1

Y1 - 2001/11/1

N2 - Hydrogen enhanced localized plasticity (HELP) is a viable mechanism for hydrogen embrittlement supported by experimental observations. According to the HELP mechanism, hydrogen induced premature failures result from hydrogen induced plastic instability which leads to hydrogen assisted localized ductile processes. The objective of this work is to reveal the role of hydrogen in possibly localizing the macroscopic deformation into bands of intense shear using solid mechanics methodology. 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 assumed to reside in both normal interstitial lattice sites (NILS) and reversible traps associated with the plastic deformation. The analysis of the plastic deformation and the conditions for plastic flow localization are carried out in plane strain uniaxial tension. For a given initial hydrogen concentration in the unstressed specimen, a critical macroscopic strain is identified at which shear localization commences.

AB - Hydrogen enhanced localized plasticity (HELP) is a viable mechanism for hydrogen embrittlement supported by experimental observations. According to the HELP mechanism, hydrogen induced premature failures result from hydrogen induced plastic instability which leads to hydrogen assisted localized ductile processes. The objective of this work is to reveal the role of hydrogen in possibly localizing the macroscopic deformation into bands of intense shear using solid mechanics methodology. 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 assumed to reside in both normal interstitial lattice sites (NILS) and reversible traps associated with the plastic deformation. The analysis of the plastic deformation and the conditions for plastic flow localization are carried out in plane strain uniaxial tension. For a given initial hydrogen concentration in the unstressed specimen, a critical macroscopic strain is identified at which shear localization commences.

UR - http://www.scopus.com/inward/record.url?scp=0035508178&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035508178&partnerID=8YFLogxK

U2 - 10.1016/S0997-7538(01)01179-2

DO - 10.1016/S0997-7538(01)01179-2

M3 - Article

AN - SCOPUS:0035508178

VL - 20

SP - 857

EP - 872

JO - European Journal of Mechanics, A/Solids

JF - European Journal of Mechanics, A/Solids

SN - 0997-7538

IS - 6

ER -