Detail publikace

In Situ SEM/EBSD analysis of fatigue crack propagation behavior of a super duplex stainless steel

CHAI, G. PENG, R. L SLÁMEČKA, K. JOHANSSON S.

Originální název

In Situ SEM/EBSD analysis of fatigue crack propagation behavior of a super duplex stainless steel

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

Fatigue crack branching and deflection behaviour in an UNS S32750 (SAF 2507) duplex stainless steel has been investigated using an In-situ SEM/EBSD fatigue test and a conventional da/dN methodology. Occurrence of crack branching results mainly from the extrusions and intrusions of slip bands developed in the grains. The number of crack branches formed depends strongly on the loading condition and the microstructure of the material. The in-situ observation confirms that the formation of crack branches can significantly reduce the crack propagation rate that leads to crack growth retardation in the main mode I crack path. The crack branches formed are usually not ideal. They can propagate almost transversely to the main crack direction with a mode II stress intensity factor, SIF, and a rate that is much higher than that of the main crack. Crack deflection occurs mainly at the phase boundaries. A high crack deflection can also lead to a crack growth retardation. The high crack deflection and branching behaviour leads to a high fatigue threshold value of the material investigated since they have caused high crack growth retardation and high crack closure.

Klíčová slova

Duplex stainless steels; EBSD analysis; Fatigue closure; Fatigue crack branching; Fatigue crack deflection; Fatigue crack propagation

Autoři

CHAI, G.; PENG, R. L; SLÁMEČKA, K.; JOHANSSON S.

Rok RIV

2008

Vydáno

2. 9. 2008

Nakladatel

Vutium

Místo

Brno

ISBN

9781617823190

Kniha

Multilevel Approach to Fracture of Materials, Components and Structures (ECF17)

Edice

1

Číslo edice

1

Strany od

1350

Strany do

1357

Strany počet

8

BibTex

@inproceedings{BUT98947,
  author="CHAI, G. and PENG, R. L and SLÁMEČKA, K. and JOHANSSON S.",
  title="In Situ SEM/EBSD analysis of fatigue crack propagation behavior of a super duplex stainless steel",
  booktitle="Multilevel Approach to Fracture of Materials, Components and Structures (ECF17)",
  year="2008",
  series="1",
  number="1",
  pages="1350--1357",
  publisher="Vutium",
  address="Brno",
  isbn="9781617823190"
}