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A study on fatigue damage and crack initiation in austenitic steel matrix during very high cycle fatigue
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, Faculty of Science & Engineering. Alleima AB, Sweden.ORCID iD: 0000-0003-1640-6366
2024 (English)In: International Journal of Fatigue, ISSN 0142-1123, E-ISSN 1879-3452, Vol. 179, article id 108033Article in journal (Refereed) Published
Abstract [en]

Fatigue damage and crack initiation behavior has been studied in an austenitic stainless steel using a novel progressive stepwise load increasing method with a cycle step greater than 108 cycles and investigated with a FIB-SEM. Subsurface crack origin with a fine granular area in the matrix was formed. Heterogeneous plastic deformation causes strain localization and grain fragmentation. Localized plasticity exhaustion induces crack initiation. A crack origin is completed once a short crack reaches the stress intensity factor threshold for stage II crack propagation. This study provides a fundamental discussion how damage and crack initiation in matrix occur during very high cycle fatigue.

Place, publisher, year, edition, pages
ELSEVIER SCI LTD , 2024. Vol. 179, article id 108033
Keywords [en]
Very high cycle fatigue; Fine granular area; Grain fragmentation; Dislocation slip; Crack initiation
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:liu:diva-199957DOI: 10.1016/j.ijfatigue.2023.108033ISI: 001113592000001OAI: oai:DiVA.org:liu-199957DiVA, id: diva2:1825487
Available from: 2024-01-09 Created: 2024-01-09 Last updated: 2024-10-18

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • de-DE
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