Influence of indirect ultrasonic vibration on the microstructure and mechanical behavior of Al-Si-Cu alloy

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Carlos Silva Ribeiro (Author) FEUP; Hélder Puga (Author) Other; Joaquim Barbosa (Author) Other; Ana Maria Pinto (Author) Other; M. Prokic (Author) Other

Journal

The Journal is awaiting validation by the Administrative Services.

Title: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

Vol. 560

Pages: 589-595

ISSN: 0921-5093

Indexing

ISI Web of Knowledge - 36 Citations

Scopus - 51 Citations

Other information

Authenticus ID: P-002-19V

DOI: 10.1016/j.msea.2012.09.106

Abstract (EN): The influence of high intensity ultrasound (US) propagating through a steel mold on the microstructure and mechanical properties of die-cast AlSi9Cu3(Fe), was studied for different levels of electric power and at different distances to the waveguide/mold interface. The effect of those parameters on the morphology of alpha-Al and eutectic Si and on the volume of porosity were investigated and characterized. The morphological characterization revealed that the high intensity vibration not only promoted the formation of small alpha-Al globular grains but also modify the eutectic silicon, as well as decreased the volume of porosity. Besides microstructure modification, US treatment improved the alloy mechanical properties, namely UTS and strain, which maximum values were 339 MPa and 2.9% respectively by comparison to the values obtained for castings produced without US vibration. A mechanism of eutectic Si modification based on theoretical experimental analysis is proposed.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7