SwePub
Sök i LIBRIS databas

  Utökad sökning

onr:"swepub:oai:DiVA.org:kth-323017"
 

Sökning: onr:"swepub:oai:DiVA.org:kth-323017" > Creep-fatigue prope...

  • Fischer, TimKTH,Materialvetenskap (författare)

Creep-fatigue properties of austenitic cast iron D5S with tension and compression dwell : A dislocation density-based crystal plasticity study

  • Artikel/kapitelEngelska2022

Förlag, utgivningsår, omfång ...

  • Elsevier BV,2022
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:kth-323017
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-323017URI
  • https://doi.org/10.1016/j.msea.2022.144212DOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • QC 20230112
  • To predict and better understand the creep-fatigue behaviour of austenitic cast iron D5S under tension and compression dwell at 800 degrees C, a physics-based crystal plasticity model that describes the complex rate-and temperature-dependent deformation of the material as a function of the dislocation density is implemented. In addition to the tension and compression dwell direction, the effect of three different dwell times (30, 180 and 600 s) on the creep-fatigue properties is investigated. The dislocation density-based crystal plasticity simulations are compared to experimental tests from a prior work. While relaxation tests and low-cycle fatigue (LCF) tests without dwell assist in systematically identifying the material parameters, creep-fatigue (CF) data is used to validate the predictions. The virtual testing is performed on a large-scale representation of the actual test specimen with a polycrystalline structure. To analyse the fatigue damage mechanism, small-scale predictions are also conducted using a micromechanical unit cell approach. Here, a single graphite nodule frequently found in the material is embedded into the austenitic matrix. In the present work, a close agreement is achieved between the predicted CF behaviour and the experimental results. Consistent with the experimental findings, the simulation results show that the addition of compression dwell leads to an uplift of the overall tensile stress level, which significantly reduces the fatigue life of the material. The unit cell studies demonstrate that during this uplift, a strong localisation of stresses and strains arises at the graphite/matrix interface, triggering the nucleation and growth of cavities and/or debonding.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Xiang, ShengmeiKTH,Materialvetenskap(Swepub:kth)u15h790p (författare)
  • Dahlberg, Carl F. O.,1980-KTH,Teknisk mekanik(Swepub:kth)u11tguno (författare)
  • Hedström, Peter,1955-KTH,Materialvetenskap(Swepub:kth)u1hu0w18 (författare)
  • KTHMaterialvetenskap (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Materials Science & Engineering: Elsevier BV860, s. 144212-0921-50931873-4936

Internetlänk

Hitta via bibliotek

Till lärosätets databas

Sök utanför SwePub

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy