Simultaneous enhancement of strength and fatigue crack growth behavior of nanocrystalline steels by annealing

Thomas Leitner, Simon Pillmeier, Karoline S. Kormout, Reinhard Pippan, Anton Hohenwarter

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12 Citations (Scopus)


Nanocrystalline materials tend to have an inferior fatigue crack-growth behavior, compared to coarser-grained counterparts, due to the loss of crack-closure effects. Strategies to mitigate this effect are widely unknown as grain-refinement changes the strength, however, often also the fracture-mode and cyclic material behavior so that the effect of individual parameters is difficult to discriminate. To address this issue, the fatigue crack-growth behavior of a nanocrystalline austenitic-steel (316L) in two conditions with different strength but comparable grain-size is investigated. The increased strength level, realized by an annealing treatment, leads to an improvement of the fatigue crack-growth behavior.
Original languageEnglish
Pages (from-to)39-43
Number of pages5
JournalScripta Materialia
Issue numberOctober
Early online date11 Jul 2017
Publication statusPublished - 1 Oct 2017


  • Austenitic steels
  • Fatigue crack growth
  • High pressure torsion
  • Nanocrystalline materials
  • Severe plastic deformation

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