Effect of Compound Energy-Field with Temperature and Ultrasonic Vibration on Bending Properties of 2195 Al-Li Alloy

Abstract:

In order to solve the problem of fracture and large springback during the bending forming of Al-Li alloy, the bending forming process under the compound energy-field (CEF) of temperature and ultrasonic vibration was studied. It is expected to reduce the temperature required for bending forming of Al-Li alloy with the help of ultrasonic vibration energy-field while maintaining the forming quality. The research was carried out by combining with ultrasonic vibration energy of 1.0~1.6 kW under the temperature conditions of 80~200 °C. The effects of CEF on the bending force, springback, bending fillet radius and microstructure of 2195 Al-Li alloy sheets were analyzed. The results show that at a relatively low temperature for hot forming, the bending force can be reduced by combining with ultrasonic vibration energy-field. The springback and fracture are effectively inhibited, thus improving the high temperature softening effect and bending properties of 2195 Al-Li alloy.

Key words:2195 Al-Li alloy;temperature and ultrasonic vibration;compound energy-field;bending properties;microstructure