Evaluation of ultrasonic aluminium degassing by piezoelectric sensor
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , , |
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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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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1817544894204346368 |