2005•Practical MetallographyRequires access

Effect of Sr Addition on the Microstructure of a Rapidly Solidified Al-12 wt.% Si Alloy

Yan Wang, Zhonghua Zhang, Shaohua Zheng, Weimin Wang, Xiufang Bian

Abstract

Abstract The effect of Sr addition on the microstructure of a melt-spun Al-12% Si alloy has been investigated using X-ray diffraction and transmission electron microscopy. The Sr addition has no effect on the phase constitution but has a marked effect on the microstructure of the melt-spun alloy. The distribution, morphology and orientation of Si in the melt-spun alloy with the Sr addition are different from those in the alloy without Sr. Under rapid solidification conditions, cooling rates play a dominant role in the microstructure formation of the Al-12% Si alloy.

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Key concepts: Microstructure, Alloy, Materials science, Transmission electron microscopy, Metallurgy, Phase (matter), Optical microscope, Diffraction