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| icrostructure and Mechanical Properties of Hypereutectic Al-Si Alloy Treated by Ultrasonic |
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| DOI：DOI：10.3969/j.issn.1007-7545.2011.07.008 |
| KeyWord:metal material; Al-20%Si alloy; ultrasonic treatment; microstructure; mechanical properties; fracture mechanism |
| Author | Institution |
| CHENG Zhao-hu |
合肥工业大学 材料科学与工程学院，合肥 |
| CHENG He-fa |
合肥工业大学 材料科学与工程学院，合肥 |
| HUANG Xiao-mei |
合肥工业大学 材料科学与工程学院，合肥 |
| YANG Jun |
合肥工业大学 材料科学与工程学院，合肥 |
| YU Hao |
合肥工业大学 材料科学与工程学院，合肥 |
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| Abstract: |
| The effects of high-intensity ultrasonic treatment on the microstructure and mechanical properties of Al-20%Si are investigated. The results show that treated with high-intensity ultrasonic at 660℃, the coarse plank primary Si is refined and forms into the spherical granules. The primary Si phase in the alloy is well-distributed. The tensile strength and elongation of the alloy are improved. From the fracture surface of the Al-20%Si alloy treated with ultrasonic sound, many tearing slits and dimples can be seen. The characteristic of brittle fracture in combination with toughness fracture is observed. |
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