Study of the durability of ferritic - austenitic steel samples after cyclical fatigue impact

The purpose of this article is to investigate the fatigue strength of corrosion resistant ferritic austenitic steels used in marine equipment. Two groups of sheet steel samples were prepared: the first group were reference parts and the second group of samples were welded. The fatigue tests were per...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2021-02, Vol.1037 (1), p.12036
Main Authors: Georgiev, Georgi, Argirov, Yaroslav, Mechkarova, Tatyana, Spasova, Daniela, Stoyanova, Aneliya
Format: Article
Language:English
Subjects:
Austenitic stainless steels
Corrosion fatigue
Corrosion resistance
Corrosion resistant steels
Crack propagation
Duplex stainless steels
Fatigue failure
Fatigue strength
Fatigue tests
Ferritic stainless steels
Metal fatigue
Optical microscopy
Phase composition
Steel
Strip steel
X-ray diffraction
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Summary:The purpose of this article is to investigate the fatigue strength of corrosion resistant ferritic austenitic steels used in marine equipment. Two groups of sheet steel samples were prepared: the first group were reference parts and the second group of samples were welded. The fatigue tests were performed with specially developed vibrating equipment. The destroyed surfaces were examined by optical microscopy, and the phase composition by X-ray diffraction analysis. Fatigue strength was evaluated by the number of cycles needed for a crack at a certain alternating load. Fatigue tests show how multi-cyclical fatigue affects the formation and development of a fatigue crack, and metallographic and X-ray diffraction analysis shows the phase changes occurring in the structure of SAF 2507 steel.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/1037/1/012036