Publication detail

Microstructure-aided Analysis of Fatigue Thresholds in Duplex Stainless Steel

POKLUDA, J. PODRÁBSKÝ, T. SLÁMEČKA, K. POSPÍŠILOVÁ, S. CHAI, G.

Original Title

Microstructure-aided Analysis of Fatigue Thresholds in Duplex Stainless Steel

Type

journal article in Web of Science

Language

English

Original Abstract

High fatigue threshold values of duplex ferritic-martensitic steels are interpreted by using a unified model of roughness- and plasticity induced crack closure. Complex metallographical and fractographical analysis was performed in order to obtain characteristics of tortuous crack paths produced by crack deflection and branching mainly at austenite/ferrite interfaces. Calculated values of effective thresholds are in a good agreement with experimental data. The total level of extrinsic toughening (closure + shielding) induced by the duplex microstructure was determined to be as much as 70% of measured fatigue threshold values. This is the main reason for the high resistance to propagation of long fatigue cracks in the near-threshold region.

Keywords

Fatigue thresholds, duplex steel, crack deflection, crack branching, extrinsic toughening, unified closure model

Authors

POKLUDA, J.; PODRÁBSKÝ, T.; SLÁMEČKA, K.; POSPÍŠILOVÁ, S.; CHAI, G.

RIV year

2008

Released

23. 1. 2008

ISBN

0255-5476

Periodical

Materials Science Forum

Year of study

567-568

Number

1

State

Swiss Confederation

Pages from

101

Pages to

104

Pages count

4

BibTex

@article{BUT45344,
  author="Jaroslav {Pokluda} and Tomáš {Podrábský} and Karel {Slámečka} and Simona {Hutařová} and Guocai {Chai}",
  title="Microstructure-aided Analysis of Fatigue Thresholds in Duplex Stainless Steel",
  journal="Materials Science Forum",
  year="2008",
  volume="567-568",
  number="1",
  pages="101--104",
  issn="0255-5476"
}