Numerical and Experimental Study on Solidification Microstructure of Al-5.0Cu Alloy under Combined Fields of Power Ultrasonic and Squeeze Casting

doi:10.3901/JME.2022.10.087

Abstract

Abstract: The Al-5.0Cu alloy melt is processed by combined fields of squeeze casting and ultrasonic vibration, and the microstructure under different process parameters are examined by OM. The interfacial heat transfer coefficient curve between cast and mold under combined fields is calculated using inverse analysis, then the solidification microstructures under different conditions are simulated based on CAFE model and compared with the macrostructure, the temperature change during the experiment in the melt is also measured. The effects of different processes on the solidification structure of Al-5.0Cu alloy were studied by means of numerical simulation and experimental verification. The results show that combined fields can further improve the solidification structure of the alloy and completely eliminate the casting defects compared with the single external field. The combined fields can also lead to the uniformly distribution of temperature in the melt and significant refinement of Al-5.0Cu alloy primary grain, which is beneficial to obtain uniform and fine microstructure. The results provide a new idea for refining the microstructure and improving the mechanical properties of Al-5. 0Cu alloy.

Key words: Al-5.0Cu alloy, ultrasonic vibration, squeeze casting, numerical simulation, CAFE model

CLC Number:

TG24

LIN Bo, FAN Tao, ZHANG Yang, ZHAO Yuliang, ZHANG Weiwen, WANG Ying. Numerical and Experimental Study on Solidification Microstructure of Al-5.0Cu Alloy under Combined Fields of Power Ultrasonic and Squeeze Casting[J]. Journal of Mechanical Engineering, 2022, 58(10): 87-94.

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