The influence of processing parameters on the ultrasonic degassing of molten AlSi9Cu3 aluminium alloy

• Type: Article in International Scientific Journal
• Date: 2009

Authors

Hélder Puga (Author) FEUP; José Barbosa (Author) FEUP; E. Seabra (Author) Other; S. Ribeiro (Author) FEUP; M. Prokic (Author) Other

Journal

Title: Materials Letters

Pages: 806-808

ISSN: 0167-577X

Publisher: Elsevier

Indexing

ISI Web of Science

Scopus

INSPEC

COMPENDEX

Scientific classification

FOS: Engineering and technology > Mechanical engineering

CORDIS: Technological sciences > Engineering > Mechanical engineering > Metalurgia Metallurgy

Other information

DOI: 10.1016/j.matlet.2009.01.009

Abstract (EN): The effect of high intensity ultrasound on the degassing of AlSi9Cu3 alloy using the novel MMM (Multi-frequency Multimode Modulated) technology was studied. Different ultrasonic parameters (power and frequency), melt temperature and processing times were tested and their influence on the degassing efficiency evaluated. RPT (Reduced Pressure Test) was used to evaluate the hydrogen content in the alloys and the samples porosity level and density. For the experimental conditions used in this research, it was found that ultrasonic frequency has no influence on the hydrogen removal rate that, in turn, strongly depends on the ultrasonic power, the processing time and the melt temperature. The experimental results suggest that the MMM ultrasonic technology is an important improvement to the fixed-frequency ultrasonic systems by significantly decreasing the processing time to achieve a quasi-equilibrium hydrogen concentration in aluminium melts.

Language: English

Type (Professor's evaluation): Scientific