In situ microtomography investigation of microstructural evolution in Al-Cu alloys during holding in semi-solid state
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 mierostructure 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.
Al-Cu alloys microtomography remelting microstructure
S.TERZI L.SALVO M.SUERY A.DAHLE E.BOLLER
Australian Research Council Centre of Excellence for Design in Light Metals, Materials Engineering,T Université de Grenoblé, Science et Ingénierie des Matériaux et Procédés,Génie Physique et Mécanique European Synchrotron Radiation Facility, 6 rue Jules Horowitz, BP220, 38043 Grenoble Cedex, France
国际会议
北京
英文
734-738
2010-09-16（万方平台首次上网日期，不代表论文的发表时间）