Resolving the Morphology of Niobium Carbonitride Nano-Precipitates in Steel Using Atom Probe Tomography

被引：32

作者：

Breen, Andrew J. ^{[1
,2
]}

Xie, Kelvin Y. ^{[3
]}

Moody, Michael P. ^{[4
]}

Gault, Baptiste ^{[4
]}

Yen, Hung-Wei ^{[1
,2
]}

Wong, Christopher C. ^{[5
]}

Cairney, Julie M. ^{[1
,2
]}

Ringer, Simon P. ^{[1
,2
]}

机构：

[1] Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia

[2] Univ Sydney, Australian Ctr Microscopy & Microanal, Sydney, NSW 2006, Australia

[3] Johns Hopkins Univ, Sch Mech Engn, Baltimore, MD 21218 USA

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

[5] Univ Sydney, Dept Psychol, Sydney, NSW 2006, Australia

来源：

MICROSCOPY AND MICROANALYSIS | 2014年 / 20卷 / 04期

基金：

澳大利亚研究理事会;

关键词：

HSLA steel; atom probe tomography; niobium; precipitation; clustering; local magnification effects; LOCAL MAGNIFICATION; GP ZONES; RECONSTRUCTION; TEMPERATURE; ALUMINUM; KINETICS; COPPER; ALLOY; NBC;

D O I：

10.1017/S1431927614012872

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Atom probe is a powerful technique for studying the composition of nano-precipitates, but their morphology within the reconstructed data is distorted due to the so-called local magnification effect. A new technique has been developed to mitigate this limitation by characterizing the distribution of the surrounding matrix atoms, rather than those contained within the nano-precipitates themselves. A comprehensive chemical analysis enables further information on size and chemistry to be obtained. The method enables new insight into the morphology and chemistry of niobium carbonitride nano-precipitates within ferrite for a series of Nb-microalloyed ultra-thin cast strip steels. The results are supported by complementary high-resolution transmission electron microscopy.

引用

页码：1100 / 1110

页数：11

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