In situ microtomography investigation of microstructural evolution in Al-Cu alloys during holding in semi-solid state

被引：1

作者：

S.TERZI ^{[1
]}

L.SALVO ^{[2
]}

M.SUERY ^{[2
]}

A.DAHLE ^{[1
]}

E.BOLLER ^{[3
]}

机构：

[1] Australian Research Council Centre of Excellence for Design in Light Metals,Materials Engineering,The University of Queensland,Brisbane Queensland 4072,Australia

[2] Université de Grenoble,Science et Ingénierie des Matériaux et Procédés,Génie Physique et Mécanique des Matériaux,UMR CNRS 5266,Grenoble INP,Université Joseph Fourrier,BP46,38402 Saint-Martin d'Hères Cedex,France

[3] European Synchrotron Radiation Facility,6 rue Jules Horowitz,BP220,38043 Grenoble Cedex,France

来源：

Transactions of Nonferrous Metals Society of China | 2010年 / 20卷 / S3期

关键词：

Al-Cu alloys; microtomography; remelting; microstructure;

D O I：

暂无

中图分类号：

TG146 [有色金属及其合金];

学科分类号：

080502 ;

摘要：

The aim of this paper is to report the results of experiments carried out on Al-Cu alloys with different Cu contents,studying the microstructure evolution during holding in the semi-solid state.The 3-D microstructure was observed by in situ X-ray microtomography carried out at ESRF Grenoble,France.The variation of the solid-liquid interface area per unit volume during holding was determined.In addition,local observations show that two coarsening mechanisms of the solid particles occur simultaneously:dissolution of small particles to the benefit of larger ones by an Ostwald-type mechanism and the growth of necks between solid particles due to coalescence.These observations confirm that in situ X-ray tomography is a very powerful tool to study the microstructure evolution in the semi-solid state and the influencing mechanisms in real-time.

引用

页码：734 / 738

页数：5

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