Effect of low hydrogenation on the low-cycle fatigue of zirconium alloy. (June 2018)

• Record Type: Journal Article
• Authors: Nikulin, S.A.; Rozhnov, A.B.; Nechaykina, T.A.; Rogachev, S.O.; Zadorozhnyy, M.Yu.; Alsheikh, Hanan
• Is Part Of: International journal of fatigue. Volume 111(2018)
• Page Start: 1
• Page End: 6
• Publication Date: 2018-06
• Subjects: Low cycle fatigue -- Zirconium alloys -- Hydride -- Fractography -- Dynamic mechanical analyzer; Materials -- Fatigue -- Periodicals; Materials -- Fatigue; Periodicals; 620.1122
• DOI: 10.1016/j.ijfatigue.2018.02.003
• Languages: English
• ISSNs: 0142-1123

Abstract

Highlights: The effect of hydrides on the low-cycle fatigue of a E110 zirconium alloy has been studied. The fatigue tests have been performed using a dynamic mechanical analyzer. 0.02% weight of hydrogen has a positive effect on the fatigue resistance for transverse samples. 0.02% weight of hydrogen does not affect the fatigue resistance for longitudinal samples. The mechanisms of fatigue crack propagation in hydrided E110 alloy samples are proposed. Abstract: The comparative low-cycle fatigue tests of small-sized flat E110 zirconium alloy samples (hydrogenated and non-hydrogenated) at room temperature using a dynamic mechanical analyzer have been carried out. It is shown that the presence of hydrogen in E110 alloy with a mass fraction up to 0.02% has a positive effect on the fatigue resistance of samples oriented transversely to the rolling direction and does not affect the fatigue resistance of the samples oriented along the rolling direction. The mechanisms of the fatigue crack propagation in hydrogenated samples with different orientation of hydrides are proposed.