Open AccessStudy of the durability of ferritic - austenitic steel samples after cyclical fatigue impact
Author(s) -
Georgi Georgiev,
Yaroslav Argirov,
Tatyana Mechkarova,
Daniela Spasova,
Aneliya Stoyanova
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1037/1/012036
Subject(s) - austenite , materials science , metallurgy , welding , durability , fatigue limit , corrosion fatigue , fatigue testing , optical microscope , composite material , corrosion , microstructure , scanning electron microscope
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.