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

doi:10.1016/j.msea.2012.09.106

Utilize este identificador para referenciar este registo: https://hdl.handle.net/1822/24847

Título:	Influence of indirect ultrasonic vibration on the microstructure and mechanical behavior of Al-Si-Cu alloy
Autor(es):	Puga, Hélder Barbosa, J. Costa, Sónia Ribeiro, Carlos Silva Pinto, A. M. P. Prokic, Miodrag
Palavras-chave:	Aluminium alloys Casting Nucleation Mechanical properties Ultrasound Ultrasonic vibration Si modification Mechanical characterization Aluminum alloys
Data:	2013
Editora:	Elsevier Science
Revista:	Materials Science and Engineering: A
Resumo(s):	The influence of high intensity ultrasound (US) propagating through a steel mold on the microstructure and mechanical properties of die-cast AlSi9Cu3, for different levels of electric power and at different distances to the waveguide/mold interface. The influence of those parameters on the morphology of -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 -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
Tipo:	Artigo
URI:	https://hdl.handle.net/1822/24847
DOI:	10.1016/j.msea.2012.09.106
ISSN:	0921-5093
Arbitragem científica:	yes
Acesso:	Acesso aberto
Aparece nas coleções:	CIICS - Artigos em revistas de circulação internacional com arbitragem científica CT2M - Artigos em revistas de circulação internacional com arbitragem científica