Atom probe tomography of reactor pressure vessel steels: An analysis of data integrity

被引：35

作者：

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

Burke, M. G. ^{[3
]}

Gault, B. ^{[2
]}

Saxey, D. Wf. ^{[2
]}

Styman, P. ^{[2
]}

Wilford, K. B. ^{[4
]}

Williams, T. J. ^{[4
]}

机构：

[1] B168 Harwell Business Ctr, Natl Nucl Lab, Didcot OX11 0QA, Oxon, England

[2] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

[3] Bechtel Marine Prop Corp, W Mifflin, PA 15122 USA

[4] Rolls Royce Plc, Derby DE21 7XX, England

来源：

ULTRAMICROSCOPY | 2011年 / 111卷 / 06期

关键词：

Atom probe tomography; Reactor pressure vessel steels; Data integrity; Experimental artefacts; PERFORMANCE; EVOLUTION; APFIM; WELD;

D O I：

10.1016/j.ultramic.2010.12.033

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

In this work, the importance of optimising experimental conditions for the analysis of reactor pressure vessel (RPV) steels using atom probe tomography is explored. The quality of the resultant atom probe data is assessed in terms of detection efficiency, noise levels and mass resolution. It is demonstrated that artefacts can exist even when experimental conditions have been optimised. In particular, it is shown that surface diffusion of some minority species, including P and Si, to major poles prior to field evaporation can be an issue. The effects were most noticeable during laser pulsing. The impact of surface migration on the characterisation of dislocations and grain boundaries is assessed. The importance of selecting appropriate regions of the reconstructed data for subsequent re-analysis is emphasised. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：676 / 682

页数：7

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