Effect of the hydrogen contents on the circumferential mechanical properties of zirconium alloy claddings

Kim, Junhwan; Lee, Myoung Ho; Choi, Byoung Kwon; Jeong, Yong Hwan

doi:10.1016/j.jallcom.2006.05.074

Cited by 40 publications

(10 citation statements)

References 8 publications

(8 reference statements)

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“…The results are by some earlier reports [27,28]. The effects of interstitial hydrogen and hydride phases are opposite, but the distinct loss of plasticity observed in another studies [25,26,29,31] might appear at high hydrogen content and a great number of hydrides. The separation of these effects is not easy at low hydrogen content.…”

Section: Discussionsupporting

confidence: 76%

“…The fracture strains decreased rapidly with increasing hydride blister/layer depth to levels of about 100 µm deep and then remained roughly constant [30]. As the hydrogen content increased, an increase in the strength, a decrease in the ductility and the maximum stress were observed with increasing hydrogen content for Zircaloy-4 [31]. The ductility at room temperature decreased with increasing hydrogen content [26].…”

Section: Hydrogen Degradationmentioning

confidence: 93%

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Hydrogen degradation of pre-oxidized zirconium alloys

Szoka

Gajowiec

Zieliński

et al. 2017

Advances in Materials Science

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The presence of the oxide layers on Zr alloys may retard or enhance the hydrogen entry and material degradation, depending on the layer features. This research has been aimed to determine the effects of preoxidation of the Zircaloy-2 alloy at a different temperature on hydrogen degradation. The specimens were oxidised in laboratory air at 350ºC, 700ºC, and 900ºC. After, some samples were tensed at 10-5 strain rate and simultaneously charged with hydrogen under constant direct voltage in 1 N sulfuric acid at room temperature. Other specimens were charged without any tension, then annealed at 400ºC for 4 h and finally tensed at above strain rate. The SEM examinations were performed on the cross-sections and fracture faces of specimens. The obtained results demonstrate the effects of the oxide layer on the cathodic current and hydrogen entry, mechanical properties and the appearance of hydrides and fracture behaviour.

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Section: Discussionsupporting

confidence: 76%

Section: Hydrogen Degradationmentioning

confidence: 93%

Hydrogen degradation of pre-oxidized zirconium alloys

Szoka

Gajowiec

Zieliński

et al. 2017

Advances in Materials Science

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“…Meanwhile, some slight disparities can still be observed. 6,[22][23][24][25][26] Experimentally, the A-EDC test can achieve a stable uniaxial tension condition in the hoop direction throughout the test. For the other tests, some of them are unable to derive stress-strain relation by experiments.…”

Section: Hoop Stress-strain Relation Derived From A-edc Testsmentioning

confidence: 99%

Mechanical Properties of Zircaloy-4 Cladding Tube by Advanced Expansion due to Compression (A-EDC) Test

et al. 2017

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A new testing technique named advanced expansion due to compression (A-EDC) has been developed with an attempt to study the hoop mechanical behavior of Zircaloy-4 cladding under the pellet-cladding mechanical interaction (PCMI) and the presumed reactivity-initiated accident (RIA). The Zircaloy-4 used in this work showed elongated grains in the tube longitudinal direction, large amounts of residual strain, and crystallographic texture. The nite element method (FEM) analysis illustrates that the A-EDC test shows a uniaxial tension in the hoop direction, which has also been con rmed by experiments. In addition, the hoop stress-strain curve has been derived at room temperature by the A-EDC tests. Moreover, the fractured surface has been observed in this research.

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“…neutron economy, mechanical properties and corrosion resistance under irradiation. This can be obtained by a better control of the microstructure during optimizing heat treatments or developing new alloys [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%