Ultrasonic processing is known to be an efficient means of aluminium melt degassing and structure modification with additional benefits of being economical and environment friendly. The present paper reports on the kinetics of ultrasonic degassing and regassing of foundry aluminium alloys and on pilot scale degassing trials. The efficiency of ultrasonic degassing is compared with conventional Ar rotary degassing. Direct measurements of hydrogen concentration in the melt by the Foseco Alspek-H probe are used along with a reduced pressure test. The effects of ultrasonic processing on porosity are studied using three-dimensional X-ray tomography.
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Project Title: Fabrication of Lightweight Aluminum Metal matrix composites and validation In Green vehicles Topic: LC-GV-06-2020 Advanced light materials and their production processes for automotive applications.