Microstructural mechanisms of fatigue crack non-propagation in TRIP-maraging steels

Z. Zhang, Motomichi Koyama, M. M. Wang, Kaneaki Tsuzaki, C. C. Tasan, Hiroshi Noguchi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In contrast to conventional martensitic steels, transformation-induced plasticity (TRIP)-maraging steels exhibit exceptional high ductility without sacrificing strength and excellent fatigue property owing to the retained austenite/maraging martensite laminated structure. In this study, TRIP-maraging steel (Fe-9Mn-3Ni-1.4Al-0.01C, wt.%) with fine grained austenite was used to investigate the mechanism of high cycle fatigue resistance. Our analyses revealed that soft austenite region acts as a preferential crack propagation path, but the plastic deformation during crack opening involves martensitic transformation, resisting subsequent crack growth via transformation-induced local hardening or crack closure. Moreover, crack growth along the laminates and across the block boundary forms a zigzag crack path, which would act as roughness-induced crack closure. The combined effect of these factors plays an important role in resisting fatigue crack growth at high cycle fatigue.

Original languageEnglish
Pages (from-to)126-136
Number of pages11
JournalInternational Journal of Fatigue
Volume113
DOIs
Publication statusPublished - Aug 1 2018

Fingerprint

Maraging steel
Fatigue Crack
Plasticity
Austenite
High Cycle Fatigue
Crack Closure
Crack propagation
Steel
Crack closure
Crack Growth
Fatigue of materials
Crack
Cracks
Martensitic Transformation
Martensite
Martensitic steel
Path
Fatigue Crack Growth
Ductility
Zigzag

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Cite this

Microstructural mechanisms of fatigue crack non-propagation in TRIP-maraging steels. / Zhang, Z.; Koyama, Motomichi; Wang, M. M.; Tsuzaki, Kaneaki; Tasan, C. C.; Noguchi, Hiroshi.

In: International Journal of Fatigue, Vol. 113, 01.08.2018, p. 126-136.

Research output: Contribution to journalArticle

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