Grain refinement of Al-5%Cu aluminum alloy under mechanical vibration using meltable vibrating probe

作者：Guo Hong min^*; Zhang Ai sheng; Yang Xiang jie; Yan Ming ming

来源：Transactions of Nonferrous Metals Society of China, 2014, 24(8): 2489-2496.

DOI：10.1016/S1003-6326(14)63375-6

• Al-Cu alloy
• grain refinement
• solidification
• mechanical vibration

A mechanical vibration technique to refine solidified microstructure was reported. Vibration energy was directly introduced into a molten alloy by a vibrating horn, and the vibrating horn was melted during vibration. Effects of vibration acceleration and mass ratio on the microstructure of Al-5% Cu alloy were investigated. Results show that the present mechanical vibration could provide localized cooling by extracting heat from the interior of molten alloy, and the cooling rate is strongly dependent on vibration acceleration. It is difficult to refine the solidified microstructure when the treated alloy keeps full liquid state within the entire vibrating duration. Significantly refined microstructure was obtained by applying mechanical vibration during the initial stage of solidification. Moreover, mechanisms of grain refinement were discussed.

• 出版日期2014-8
• 单位南昌大学