Ordered array of ω particles in β-Ti matrix studied by small-angle X-ray scattering

被引：30

作者：

Smilauerova, J. ^{[1
]}

Harcuba, P. ^{[1
]}

Strasky, J. ^{[1
]}

Straska, J. ^{[1
]}

Janecek, M. ^{[1
]}

Pospisil, J. ^{[1
]}

Kuzel, R. ^{[1
]}

Brunatova, T. ^{[1
]}

Holy, V. ^{[1
]}

Ilavsky, J. ^{[2
]}

机构：

[1] Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic

[2] Argonne Natl Lab, Argonne, IL 60439 USA

来源：

ACTA MATERIALIA | 2014年 / 81卷

基金：

美国国家科学基金会;

关键词：

omega-Ti phase; Ti alloys; Small-angle X-ray scattering; Self-ordering; PHASE-TRANSFORMATIONS; TITANIUM-ALLOY; PRECIPITATION; MO; INSTABILITIES; EXAMPLE; GROWTH;

D O I：

10.1016/j.actamat.2014.06.042

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanosized particles of omega phase in a beta-Ti alloy were investigated by small-angle X-ray scattering using synchrotron radiation. We demonstrated that the particles are spontaneously weakly ordered in a three-dimensional cubic array along the < 1 0 0 >-directions in the beta-Ti matrix. The small-angle scattering data fit well to a three-dimensional short-range-order model; from the fit we determined the evolution of the mean particle size and mean distance between particles during ageing. The self-ordering of the particles is explained by elastic interaction between the particles, since the relative positions of the particles coincide with local minima of the interaction energy. We performed numerical Monte Carlo simulation of the particle ordering and we obtained a good agreement with the experimental data. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：71 / 82

页数：12

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