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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 2    April 2003

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Electrical resistivity and structural heredity of hypereutectic Al-Si alloy melt
LI Pei-jie(李培杰), XIONG Yu-hua(熊玉华), 
ZHANG Yan-fei(张燕飞), ZENG Da-ben(曾大本)

Department of Mechanical Engineering, 
Tsinghua University, Beijing 100084, China

Abstract:The variation rule of the sensitive physical properties of Al-16%Si alloy melt was studied. The results show that within a certain temperature range, the electrical resistivity of Al-16%Si alloy melt changes abruptly in the forms of inflection points or platforms, which is ascribed to the changes in the internal microstructure of the melt. Based on this rule, the variation characteristics of microstructure can be revealed. When remelting and overheating Al-16%Si alloy to 1050℃, the hereditary effects of different original structure on solidification structure after remelting can be eliminated, which can provide scientific foundation for properly controlling the hereditary factors transmitting the structural information of melt. 

 

Key words:  Al-Si alloys; melt; original structure; electrical resistivity; structural heredity

ISSN 1672-7029
CN 43-1423/U

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