Investigation of hardening behavior in Xe ion-irradiated Zr–1Nb

Yan, Chunguang; Wang, Rongshan; Dai, Xianyuan; Wang, Yanli; Wang, Xitao; Bai, Guanghai; Zhang, Yanwei

doi:10.1016/j.jnucmat.2016.03.003

Cited by 21 publications

(1 citation statement)

References 44 publications

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“…Figure 1 shows the variation of displacement per atom (dpa) and helium concentration with depth ranging from 0 to 200 nm. This simulation was performed using the Stopping and Ranges of Ions in Matter (SRIM) software with full damage cascades mode and displacement energy of 40 eV 33 , 34 . After irradiating the TEM foil, the concentration of helium in the 200 nm foil is zero (highlighted by the right corner insert in Fig.…”

Section: Resultsmentioning

confidence: 99%

Two-dimensional vacancy platelets as precursors for basal dislocation loops in hexagonal zirconium

2020

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Zirconium alloys are widely used structural materials of choice in the nuclear industry due to their exceptional radiation and corrosion resistance. However long-time exposure to irradiation eventually results in undesirable shape changes, irradiation growth, that limit the service life of the component. Crystal defects called <c> loops, routinely seen no smaller than 13 nm in diameter, are the source of the problem. How they form remains a matter of debate. Here, using transmission electron microscopy, we reveal the existence of a novel defect, nanoscale triangle-shaped vacancy plates. Energy considerations suggest that the collapse of the atomically thick triangle-shaped vacancy platelets can directly produce <c> dislocation loops. This mechanism agrees with experiment and implies a characteristic incubation period for the formation of <c> dislocation loops in zirconium alloys.

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Section: Resultsmentioning

confidence: 99%