吉林大学学报(工学版)

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Effect of ultrasonic treatment on microstructures and properties of hypereutectic Al-Si alloys

FENG Hai-kuo1，YU Si-rong1，LI Ying-long2，GONG Li-yan2   

  1. 1.College of Materials Science and Engineering, Jilin University,Changchun 130022,China； 2.School of Materials and Metallurgy, Northeastern University, Shenyang 110004， China
  • Received:2008-01-22 Revised:2008-03-22 Online:2009-05-01 Published:2009-05-01

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Abstract:

Hypereutectic Al23%Si alloy was ultrasonic treated using a novel ultrasonic treatment equipment. The effects of ultrasonic power on the morphology and distribution of the microstructure as well as properties of the studied alloy were investigated. The course of crystallization and mechanism of microstrctural refinement for the ultrasonic treated alloy were also discussed. The results show that the ultrasonic treatment can greatly reduce the size of primary Si particulates, make them distribute much uniformly, and it can change the morphology of αAl phase from dendrite to equiaxial grain meanwhile the eutectic phase become courser than it was before. The distribution of hardness was even and the wear resistance was increased by ultrasonic treatment on Al23%Si alloy.

Key words: materials examination and analysis, ultrasonic, AlSi alloy, microstructure, hardness, wear

CLC Number: 

  • TG156
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