Detail publikačního výsledku

Microstructure-aided Analysis of Fatigue Thresholds in Duplex Stainless Steel

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

Originální název

Microstructure-aided Analysis of Fatigue Thresholds in Duplex Stainless Steel

Anglický název

Microstructure-aided Analysis of Fatigue Thresholds in Duplex Stainless Steel

Druh

Článek WoS

Originální abstrakt

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.

Anglický abstrakt

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.

Klíčová slova

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

Klíčová slova v angličtině

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

Autoři

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

Rok RIV

2010

Vydáno

23.01.2008

ISSN

0255-5476

Periodikum

Materials Science Forum

Svazek

567-568

Číslo

1

Stát

Švýcarská konfederace

Strany od

101

Strany do

104

Strany počet

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"
}