Publication detail
Microstructure-aided Analysis of Fatigue Thresholds in Duplex Stainless Steel
POKLUDA, J. PODRÁBSKÝ, T. SLÁMEČKA, K. POSPÍŠILOVÁ, S. CHAI, G.
English title
Microstructure-aided Analysis of Fatigue Thresholds in Duplex Stainless Steel
Type
WoS Article
Language
en
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 in English
Fatigue thresholds, duplex steel, crack deflection, crack branching, extrinsic toughening, unified closure model
Released
2008-01-23
ISSN
0255-5476
Journal
Materials Science Forum
Volume
567-568
Number
1
Pages from–to
101–104
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"
}