Evaluation of ultrasonic aluminium degassing by piezoelectric sensor

Detalhes bibliográficos
Autor(a) principal: Puga, Hélder
Data de Publicação: 2011
Outros Autores: Gabriel, Joaquim, Barbosa, J., Seabra, Eurico, Ribeiro, Carlos Silva, Prokic, Miodrag
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/12421
Resumo: The purpose of this work was the development of a reliable technique to evaluate the intensity of acoustic cavitation during degassing of aluminium melts and to use it to select the optimum processing time for an envisaged degassing efficiency. A high sensitivity piezoelectric disk type device was used as a sensing feedback in water and liquid AlSi9Cu3 alloy. The signal acquisition and processing was carried out on a dedicated LabVIEW® based application which allowed real-time monitoring of the piezoelectric sensor’s data and ultrasonic parameters. Standard Fast Fourier Transform was applied to obtain the dominant frequencies, as well as the sub and ultra-harmonics. It was found that the amplitude of the FFT sub-harmonic (f/2) was the best indicator to evaluate the process degassing efficiency, and it could be used to select the optimal processing time, independently of other variables. The developed methodology was applied to several AlSi9Cu3 melts, and validated by measuring the final alloy densities and the volume fraction of porosities, revealing that it is an efficient, fast and cost effective technique to evaluate the degassing treatment of aluminium alloys. Experimental curves of AlSi9Cu3 alloy degassing efficiency as a function of f/2 amplitude are presented for different degassing times.
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spelling Evaluation of ultrasonic aluminium degassing by piezoelectric sensorMeltingDegassingCastingAluminiumPiezoelectricAluminium alloysPiezoelectric devicesScience & TechnologyThe purpose of this work was the development of a reliable technique to evaluate the intensity of acoustic cavitation during degassing of aluminium melts and to use it to select the optimum processing time for an envisaged degassing efficiency. A high sensitivity piezoelectric disk type device was used as a sensing feedback in water and liquid AlSi9Cu3 alloy. The signal acquisition and processing was carried out on a dedicated LabVIEW® based application which allowed real-time monitoring of the piezoelectric sensor’s data and ultrasonic parameters. Standard Fast Fourier Transform was applied to obtain the dominant frequencies, as well as the sub and ultra-harmonics. It was found that the amplitude of the FFT sub-harmonic (f/2) was the best indicator to evaluate the process degassing efficiency, and it could be used to select the optimal processing time, independently of other variables. The developed methodology was applied to several AlSi9Cu3 melts, and validated by measuring the final alloy densities and the volume fraction of porosities, revealing that it is an efficient, fast and cost effective technique to evaluate the degassing treatment of aluminium alloys. Experimental curves of AlSi9Cu3 alloy degassing efficiency as a function of f/2 amplitude are presented for different degassing times.FCT - Fundação para a Ciência e TecnologiaElsevier ScienceUniversidade do MinhoPuga, HélderGabriel, JoaquimBarbosa, J.Seabra, EuricoRibeiro, Carlos SilvaProkic, Miodrag20112011-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/12421engH. Puga, J. Gabriel, J. Barbosa, E. Seabra, S. Ribeiro, M. Prokic- Evaluation of ultrasonic aluminium degassing by piezoelectric sensor. Journal of Materials Processing Technology 211 (2011) 1026-1033.0924-013610.1016/j.jmatprotec.2011.01.003info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-05-11T06:13:09Zoai:repositorium.sdum.uminho.pt:1822/12421Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-05-11T06:13:09Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Evaluation of ultrasonic aluminium degassing by piezoelectric sensor
title Evaluation of ultrasonic aluminium degassing by piezoelectric sensor
spellingShingle Evaluation of ultrasonic aluminium degassing by piezoelectric sensor
Puga, Hélder
Melting
Degassing
Casting
Aluminium
Piezoelectric
Aluminium alloys
Piezoelectric devices
Science & Technology
title_short Evaluation of ultrasonic aluminium degassing by piezoelectric sensor
title_full Evaluation of ultrasonic aluminium degassing by piezoelectric sensor
title_fullStr Evaluation of ultrasonic aluminium degassing by piezoelectric sensor
title_full_unstemmed Evaluation of ultrasonic aluminium degassing by piezoelectric sensor
title_sort Evaluation of ultrasonic aluminium degassing by piezoelectric sensor
author Puga, Hélder
author_facet Puga, Hélder
Gabriel, Joaquim
Barbosa, J.
Seabra, Eurico
Ribeiro, Carlos Silva
Prokic, Miodrag
author_role author
author2 Gabriel, Joaquim
Barbosa, J.
Seabra, Eurico
Ribeiro, Carlos Silva
Prokic, Miodrag
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Puga, Hélder
Gabriel, Joaquim
Barbosa, J.
Seabra, Eurico
Ribeiro, Carlos Silva
Prokic, Miodrag
dc.subject.por.fl_str_mv Melting
Degassing
Casting
Aluminium
Piezoelectric
Aluminium alloys
Piezoelectric devices
Science & Technology
topic Melting
Degassing
Casting
Aluminium
Piezoelectric
Aluminium alloys
Piezoelectric devices
Science & Technology
description The purpose of this work was the development of a reliable technique to evaluate the intensity of acoustic cavitation during degassing of aluminium melts and to use it to select the optimum processing time for an envisaged degassing efficiency. A high sensitivity piezoelectric disk type device was used as a sensing feedback in water and liquid AlSi9Cu3 alloy. The signal acquisition and processing was carried out on a dedicated LabVIEW® based application which allowed real-time monitoring of the piezoelectric sensor’s data and ultrasonic parameters. Standard Fast Fourier Transform was applied to obtain the dominant frequencies, as well as the sub and ultra-harmonics. It was found that the amplitude of the FFT sub-harmonic (f/2) was the best indicator to evaluate the process degassing efficiency, and it could be used to select the optimal processing time, independently of other variables. The developed methodology was applied to several AlSi9Cu3 melts, and validated by measuring the final alloy densities and the volume fraction of porosities, revealing that it is an efficient, fast and cost effective technique to evaluate the degassing treatment of aluminium alloys. Experimental curves of AlSi9Cu3 alloy degassing efficiency as a function of f/2 amplitude are presented for different degassing times.
publishDate 2011
dc.date.none.fl_str_mv 2011
2011-01-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/1822/12421
url http://hdl.handle.net/1822/12421
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv H. Puga, J. Gabriel, J. Barbosa, E. Seabra, S. Ribeiro, M. Prokic- Evaluation of ultrasonic aluminium degassing by piezoelectric sensor. Journal of Materials Processing Technology 211 (2011) 1026-1033.
0924-0136
10.1016/j.jmatprotec.2011.01.003
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv mluisa.alvim@gmail.com
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