Ultrasonic Effect on Refinement of Mg₂Si and Mechanical Properties of In Situ Al-Mg-Si Composites

Abstract:

Coarse primary Mg2Si was usually found in Al-Mg-Si alloys. In this experiment, to refine the coarse primary Mg2Si size, ultrasound was used as a new process. Ultrasound was injected to the molten Al-Mg-Si melts directly and its effect was significant. Average size of primary Mg2Si was reduced from 70㎛ to 15㎛, morphology was also changed to polygonal from irregular shape. Moreover tensile strength was improved by 30%, from 112 to 148 after ultrasonic injection.

• Periodical: Advanced Materials Research (Volumes 79-82)
• Pages: 549-552
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.79-82.549
• Online since: August 2009
• Authors: Dae Gyun Ko, Geun Hong Yu, Jeong Il Youn, Young Jig Kim
• Keywords: Al-Mg-Si Alloy, High Intensive Ultrasound, Primary Mg₂Si, Refinement

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