Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Hydrogen induced shear localization of the plastic flow in metals and alloys
Autore:
Sofronis, P; Liang, Y; Aravas, N;
Indirizzi:
Univ Illinois, Dept Theoret & Appl Mech, Urbana, IL 61801 USA Univ Illinois Urbana IL USA 61801 eoret & Appl Mech, Urbana, IL 61801 USA Univ Thessaly, Dept Mech & Ind Engn, Volos 38334, Greece Univ Thessaly Volos Greece 38334 pt Mech & Ind Engn, Volos 38334, Greece
Titolo Testata:
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
fascicolo: 6, volume: 20, anno: 2001,
pagine: 857 - 872
SICI:
0997-7538(200111/12)20:6<857:HISLOT>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
HIGH-PURITY IRON; AUSTENITIC STAINLESS-STEEL; NOTCHED BEND SPECIMENS; MECHANICAL-PROPERTIES; STRAIN LOCALIZATION; DISSOLVED HYDROGEN; FRACTURE PROCESSES; DEFORMATION; STRESS; NICKEL;
Keywords:
hydrogen; embrittlement; plasticity; localization;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
58
Recensione:
Indirizzi per estratti:
Indirizzo: Sofronis, P Univ Illinois, Dept Theoret & Appl Mech, 104 S Wright St, Urbana, IL 61801USA Univ Illinois 104 S Wright St Urbana IL USA 61801 IL 61801USA
Citazione:
P. Sofronis et al., "Hydrogen induced shear localization of the plastic flow in metals and alloys", EUR J MEC A, 20(6), 2001, pp. 857-872

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 hydrogeninduced 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 thereduction 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. (C) 2001 Editions scientifiques et medicales Elsevier SAS.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/04/20 alle ore 02:17:56