Effects of heavy ion irradiation on Zr-2.5Nb pressure tube alloy. II. Orientation dependent dislocation loop propagation and elemental redistribution

Qiang Wang, L. Balogh, Qingshan Dong, Ning Guo, Zhongwen Yao, Mark R. Daymond

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The irradiation induced microstructure of heavy ion irradiated Zr-2.5Nb alloy has been characterized by X-ray diffraction and transmission electron microscopy (TEM). Diffraction line profile analysis is used to analyze the X-ray diffraction data and anisotropic responses to irradiation in terms of peak broadening in axial direction (AD; sample surface normal aligned with axial direction) and transverse direction (TD; sample surface normal aligned with transverse direction) samples. More specifically, AD samples demonstrate a significantly higher peak broadening than TD for the same irradiation dose level. TEM characterization shows that heavy ion irradiation induces small <a> type dislocation loops in the range of 2-10 nm in diameter. However, up to 0.2 dpa, the dislocation densities calculated from X-ray diffraction and TEM characterization both show comparable quantities for AD and TD samples. The considerable additional peak broadening of AD samples is attributed to an intergranular strain distribution. Chemi-STEM analysis shows that Fe is depleted from β-phase to α-β phase boundary and then into the α matrix, mainly due to ion sputtering during heavy ion irradiation.

Original languageEnglish
Article number085109
JournalJournal of Applied Physics
Volume125
Issue number8
DOIs
Publication statusPublished - Feb 28 2019

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ion irradiation
heavy ions
tubes
propagation
diffraction
transmission electron microscopy
irradiation
x rays
strain distribution
sputtering
dosage
microstructure
matrices
profiles
ions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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Effects of heavy ion irradiation on Zr-2.5Nb pressure tube alloy. II. Orientation dependent dislocation loop propagation and elemental redistribution. / Wang, Qiang; Balogh, L.; Dong, Qingshan; Guo, Ning; Yao, Zhongwen; Daymond, Mark R.

In: Journal of Applied Physics, Vol. 125, No. 8, 085109, 28.02.2019.

Research output: Contribution to journalArticle

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AU - Yao, Zhongwen

AU - Daymond, Mark R.

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