Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
On the fatigue damage micromechanisms in Si-solution-strengthened spheroidal graphite cast iron
School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore.
School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore.
Department of Mechanical Engineering, Tokyo Institute of Technology, Tokyo, Japan.
Jönköping University, School of Engineering, JTH, Materials and Manufacturing. Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.ORCID iD: 0000-0002-5635-8023
Show others and affiliations
2018 (English)In: Fatigue & Fracture of Engineering Materials & Structures, ISSN 8756-758X, E-ISSN 1460-2695, Vol. 41, no 3, p. 625-641Article in journal (Refereed) Published
Abstract [en]

Graphite nodules in spheroidal graphite cast iron (SGI) play a vital role in fatigue crack initiation and propagation. Graphite nodules growth morphology can go through transitions to form degenerated graphite elements other than spheroidal graphite nodules in SGI microstructure. These graphite particles significantly influence damage micromechanisms in SGI and could act differently than spheroidal graphite nodules. Most of the damage mechanism studies on SGI focused on the role of spheroidal graphite nodules on the stable crack propagation region. The role of degenerated graphite elements on SGI damage mechanisms has not been frequently studied. In this work, fatigue crack initiation and propagation tests were conducted on EN-GJS-500-14 and observed under scanning electron microscope to understand the damage mechanisms for different graphite shapes. Crack initiation tests showed a dominant influence of degenerated graphite elements where early cracks initiated in the microstructure. Most of the spheroidal graphite nodules were unaffected at the early crack initiation stage, but few of them showed decohesion from the ferrite matrix and internal cracking. In the crack propagation region, graphite/ferrite matrix decohesion was the frequent damage mechanism observed with noticeable crack branching around graphite nodules and the crack passing through degenerated graphite elements. Finally, graphite nodules after decohesion acted like voids which grew and coalesced to form microcracks eventually causing rapid fracture of the remaining section.

Place, publisher, year, edition, pages
John Wiley & Sons, 2018. Vol. 41, no 3, p. 625-641
Keywords [en]
damage micromechanisms; fatigue crack initiation; fatigue crack propagation; spheroidal graphite cast iron
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:hj:diva-38947DOI: 10.1111/ffe.12723ISI: 000425083000008Scopus ID: 2-s2.0-85042101852Local ID: JTHMaterialISOAI: oai:DiVA.org:hj-38947DiVA, id: diva2:1187218
Available from: 2018-03-02 Created: 2018-03-02 Last updated: 2018-03-09Bibliographically approved

Open Access in DiVA

The full text will be freely available from 2018-10-03 00:00
Available from 2018-10-03 00:00

Other links

Publisher's full textScopus

Authority records BETA

Kasvayee, Keivan AmiriGhassemali, EhsanJarfors, Anders E.W.

Search in DiVA

By author/editor
Kasvayee, Keivan AmiriGhassemali, EhsanJarfors, Anders E.W.
By organisation
JTH, Materials and ManufacturingJTH. Research area Materials and manufacturing – Casting
In the same journal
Fatigue & Fracture of Engineering Materials & Structures
Metallurgy and Metallic Materials

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 50 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf