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

doi:10.1016/j.scriptamat.2017.05.051

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

Chair of Materials Physics (430)

Erich Schmid Institute of Materials Science

Research output: Contribution to journal › Article › Research › peer-review

12 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	39-43
Number of pages	5
Journal	Scripta Materialia
Volume	139.2017
Issue number	October
Early online date	11 Jul 2017
DOIs	https://doi.org/10.1016/j.scriptamat.2017.05.051
Publication status	Published - 1 Oct 2017

Keywords

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

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10.1016/j.scriptamat.2017.05.051

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title = "Simultaneous enhancement of strength and fatigue crack growth behavior of nanocrystalline steels by annealing",

abstract = "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.",

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author = "Thomas Leitner and Simon Pillmeier and Kormout, \{Karoline S.\} and Reinhard Pippan and Anton Hohenwarter",

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TY - JOUR

T1 - Simultaneous enhancement of strength and fatigue crack growth behavior of nanocrystalline steels by annealing

AU - Leitner, Thomas

AU - Pillmeier, Simon

AU - Kormout, Karoline S.

AU - Pippan, Reinhard

AU - Hohenwarter, Anton

PY - 2017/10/1

Y1 - 2017/10/1

N2 - 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.

AB - 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.

KW - Austenitic steels

KW - Fatigue crack growth

KW - High pressure torsion

KW - Nanocrystalline materials

KW - Severe plastic deformation

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DO - 10.1016/j.scriptamat.2017.05.051

M3 - Article

AN - SCOPUS:85020782658

SN - 1359-6462

VL - 139.2017

SP - 39

EP - 43

JO - Scripta Materialia

JF - Scripta Materialia

IS - October

ER -

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

Abstract

Keywords

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