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Microstructure mapping in friction stir welds of 7449 aluminium alloy using SAXS

被引：113
作者：
Dumont, M.
Steuwer, A.
Deschamps, A.
Peel, M.
Withers, P. J.
机构：
[1] Univ Manchester, Manchester Mat Sci Ctr, Manchester M1 7HS, Lancs, England
[2] Univ Aix Marseille 3, Fac St Jerome, UMR 6122, TECSEN, F-13397 Marseille 20, France
[3] CNRS, LTPCM, UMR 5614, ENSEEG, F-38402 St Martin Dheres, France
来源：
ACTA MATERIALIA | 2006年 / 54卷 / 18期
基金：
英国工程与自然科学研究理事会;
关键词：
small-angle X-ray scattering; synchrotron X-rays; microstructure; precipitation; 7xxx alloys;
D O I：
10.1016/j.actamat.2006.06.015
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This paper describes the microstructural response of an age-hardenable, high-strength 7449 aluminium alloy to friction stir welding. Plates in the naturally aged (T3) and over-aged (T79) conditions were welded using two weld tool translation speeds. Maps of precipitate volume fraction and size were obtained by spatially resolved small-angle X-ray scattering over a cross-section of the welded plate, complemented by direct observations made by transmission electron microscopy. The spatial variations of precipitate volume fraction and size were assessed quantitatively for the characteristic zones of the welds, and supported by complementary hardness measurements. The effect of initial microstructure and welding speed,in particular in the heat-affected and thermomechanically affected zones, is discussed. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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收藏
页码：4793 / 4801
页数：9
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