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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

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

Revista

A Revista está pendente de validação pelos Serviços Administrativos.

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

Vol. 560

Páginas: 589-595

ISSN: 0921-5093

Indexação

ISI Web of Knowledge - 36 Citações

Scopus - 51 Citações

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7