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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 8    No. 2    June 1998

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STRUCTURAL TRANSFORMATION AND ITS REVERSIBILITY IN LIQUID Al-13%Si ALLOY AT HIGH TEMPERATURES
Wang Weimin1 Bian Xiufang1 Qin Jingyu1 and Ye Yifu1  S. I. Sljusarenko2

Abstract:Using high temperature X-ray diffraction analysis, the liquid structures of Al-13%Si alloy at 625~1 250℃on heating and those at 675℃after overheating of various temperatures were presented. It is shown that the atomic density and coordination number of the melt increased slightly at first, then decreased greatly at 775~875℃. The liquid structure of the melt at 675℃and the morphology of the solidified alloy had no obvious change after overheating at various temperatures. These results indicate that structural transformation happens in liquid Al-13%Si and it is reversible.

 

Key words: Al-13%Si alloy structural transformation X-ray diffraction analysis

ISSN 1672-7029
CN 43-1423/U

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