Title

A2 → B2 → L2₁ Ordering Transitions in Au-Cu-Al Alloys

Abstract

The critical transition temperatures of A2 → B2 ordering and B2 → L21 ordering in Au-Cu-Al alloys were determined by electrical resistivity measurement and internal friction analysis. The Bragg-Williams-Gorski (BWG) approximation has been widely used for years as a simple mean field method to characterize order-disorder phenomena in alloys. In this article a modified BWG model was employed to analyze the chemical ordering sequence in Au-Cu-Al alloys. Based on the measured critical transition temperatures of A2 → B2 ordering, the critical temperatures of B2 → L21 ordering were calculated. The theoretical predictions were in agreement with the measured temperatures.

Department(s)

Mechanical and Aerospace Engineering

Comments

This work was carried out with the financial support of Lao Fengxiang Co. Ltd. and the National Natural Science Foundation of China under Grant No. 50571064.

Keywords and Phrases

A. Ternary alloy systems; B. Order/disorder transformations; E. Ordering energies; E. Phase diagram, prediction

International Standard Serial Number (ISSN)

0966-9795

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2009 Elsevier Inc., All rights reserved.

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