APT and TEM study of behaviour of alloying elements in neutron-irradiated zirconium-based alloys

被引：17

作者：

Jenkins, B. M. ^{[1
]}

Haley, J. ^{[1
]}

Moody, M. P. ^{[1
]}

Hyde, J. M. ^{[1
,2
]}

Grovenor, C. R. M. ^{[1
]}

机构：

[1] Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England

[2] Culham Sci Ctr, Natl Nucl Lab, Bldg D5,First Floor, Abingdon OX14 3DB, Oxon, England

来源：

SCRIPTA MATERIALIA | 2022年 / 208卷

基金：

英国工程与自然科学研究理事会;

关键词：

Atom probe tomography (APT); Transmission electron microscopy (TEM); Irradiation embrittlement; Clustering; Spinodal decomposition; SPINODAL-LIKE DECOMPOSITION; ATOM-PROBE; EVOLUTION; EMBRITTLEMENT; SHAPE;

D O I：

10.1016/j.scriptamat.2021.114323

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this study, APT and TEM analyses were used to characterise two Zr-based alloys neutron-irradiated to 13.7 dpa. The high spatial and chemical resolution of these techniques has enabled the irradiation-induced nanoscale distribution of solute elements to be characterised. The results on both Zircaloy-2 and low-Sn ZIRLO support previous observations of Fe segregation to planar dislocation arrays with enhanced Sn between. In Zircaloy-2, the APT data in this study have also revealed short-range (similar to 2 nm) clustering of Fe and Sn atoms both within the Fe-enriched planes and in the regions between dislocation arrays. The resultant microstructure is reminiscent of spinodal decomposition. In low-Sn ZIRLO Nb-rich precipitates formed in the Sn-rich planes. The data in this article enhance our understanding of microstructural evolution in Zr alloys under neutron irradiation and are relevant for predicting changes in the properties of Zr alloys in-service in fission reactors. Crown Copyright (C) 2021 Published by Elsevier Ltd on behalf of Acta Materialia Inc. All rights reserved.

引用

页数：6

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