Publikationer från Malmö universitet
Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Stable and unstable growth of crack tip precipitates
Mechanical Engineering Dept., Blekinge Institute of Technology, Karlskrona, Sweden.
Solid Mechanics, LTH, Lund University, SE22100 Lund, Sweden.
Bhabha Atomic Research Centre, Mumbai-400085, Mumbai, India.
Malmö universitet, Fakulteten för teknik och samhälle (TS), Institutionen för materialvetenskap och tillämpad matematik (MTM).ORCID-id: 0000-0001-6532-6720
2018 (engelsk)Inngår i: Procedia Structural Integrity, ISSN 2452-3216, Vol. 13, s. 1792-1797Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A model is established that describes stress driven diffusion, resulting in formation and growth of an expanded precipitate at the tip of a crack. The new phase is transversely isotropic. A finite element method is used and the results are compared with a simplified analytical theory. A stress criterium for formation of the precipitate is derived by direct integration of the Einstein-Smoluchowski law for stress driven diffusion. Thus, the conventional critical concentration criterium for precipitate growth can be replaced with a critical hydrostatic stress. The problem has only one length scale and as a consequence the precipitate grows under self-similar conditions. The length scale is given by the stress intensity factor, the diffusion coefficient and critical stress versus remote ambient concentrations. The free parameters involved are the expansion strain, the degree of anisotropy and Poisson's ratio. Solutions are obtained for a variation of the first two. The key result is that there is a critical phase expansion strain below which the growth of the new phase is stable and controlled by the stress intensity factor. For supercritical expansion strains, the precipitate grows even without remote load. The anisotropy of the expansion strongly affects the shape of the precipitate, but does not have a large effect on the crack tip shielding. (C) 2018 The Authors. Published by Elsevier B.V.

sted, utgiver, år, opplag, sider
Elsevier, 2018. Vol. 13, s. 1792-1797
Emneord [en]
Crack tip precipitation, unstable precipitate growth, crack tip shielding, delayed hydride crack growth, stress driven diffusion
HSV kategori
Identifikatorer
URN: urn:nbn:se:mau:diva-2431DOI: 10.1016/j.prostr.2018.12.359ISI: 000459860900296Scopus ID: 2-s2.0-85064590872Lokal ID: 29545OAI: oai:DiVA.org:mau-2431DiVA, id: diva2:1399184
Konferanse
European Conference on Fracture (ECF22), Belgrade, Serbia (26-31 August, 2018)
Tilgjengelig fra: 2020-02-27 Laget: 2020-02-27 Sist oppdatert: 2023-07-06bibliografisk kontrollert

Open Access i DiVA

fulltekst(667 kB)88 nedlastinger
Filinformasjon
Fil FULLTEXT01.pdfFilstørrelse 667 kBChecksum SHA-512
1439cb7d726b75ae1fb7d595dde22d2a7ada349d3d694c0d7e8c7d0732888fdd8d480fec72d4762004a737981bc6aae13e2957df555674b95e2d8fc2c517ddf7
Type fulltextMimetype application/pdf

Andre lenker

Forlagets fulltekstScopus

Person

Ståhle, PerFisk, Martin

Søk i DiVA

Av forfatter/redaktør
Ståhle, PerFisk, Martin
Av organisasjonen

Søk utenfor DiVA

GoogleGoogle Scholar
Totalt: 88 nedlastinger
Antall nedlastinger er summen av alle nedlastinger av alle fulltekster. Det kan for eksempel være tidligere versjoner som er ikke lenger tilgjengelige

doi
urn-nbn

Altmetric

doi
urn-nbn
Totalt: 22 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf