The role of acoustic pressure during solidification of AlSi7Mg alloy in sand mold casting
Autor(a) principal: | |
---|---|
Data de Publicação: | 2019 |
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/1822/60294 |
Resumo: | New alloy processes have been developed and casting techniques are continuously evolving. Such constant development implies a consequent development and optimization of melt processing and treatment. The present work proposes a method for studying the influence of acoustic pressure in the overall refinement of sand cast aluminum alloys, using and correlating experimental and numerical approaches. It is shown that the refinement/modification of the α-Al matrix is a consequence of the acoustic activation caused in the liquid metal directly below the face of the acoustic radiator. Near the feeder, there is a clear homogeneity in the morphology of the α-Al with respect to grain size and grain circularity. However, the damping of acoustic pressure as the melt is moved away from the feeder increases and the influence of ultrasound is reduced, even though the higher cooling rate seems to compensate for this effect. |
id |
RCAP_1a6f20519b2672a450a88777bd797265 |
---|---|
oai_identifier_str |
oai:repositorium.sdum.uminho.pt:1822/60294 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
spelling |
The role of acoustic pressure during solidification of AlSi7Mg alloy in sand mold castingAluminum alloySand casting: Acoustic radiatorUltrasonic melt refinementα-Al grain sizeNew alloy processes have been developed and casting techniques are continuously evolving. Such constant development implies a consequent development and optimization of melt processing and treatment. The present work proposes a method for studying the influence of acoustic pressure in the overall refinement of sand cast aluminum alloys, using and correlating experimental and numerical approaches. It is shown that the refinement/modification of the α-Al matrix is a consequence of the acoustic activation caused in the liquid metal directly below the face of the acoustic radiator. Near the feeder, there is a clear homogeneity in the morphology of the α-Al with respect to grain size and grain circularity. However, the damping of acoustic pressure as the melt is moved away from the feeder increases and the influence of ultrasound is reduced, even though the higher cooling rate seems to compensate for this effect.This work was supported by FCT funding through the project PTDC/EMEEME/30967/2017 (NORTE-0145-FEDER-030967) and by FEDER funding through COMPETE 2020, NORTE2020, PORTUGAL2020 – Programa Operacional Competitividade e Internacionalização (POCI). Additionally, this work was supported by FCT with the reference project UID/EEA/04436/2019.info:eu-repo/semantics/publishedVersionMultidisciplinary Digital Publishing InstituteUniversidade do MinhoPuga, HélderBarbosa, J.Carneiro, Vítor Hugo Pimenta2019-04-272019-04-27T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/60294eng2075-470110.3390/met9050490info: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:RCAAP2023-07-21T12:02:20Zoai:repositorium.sdum.uminho.pt:1822/60294Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:52:17.662087Repositório 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 |
The role of acoustic pressure during solidification of AlSi7Mg alloy in sand mold casting |
title |
The role of acoustic pressure during solidification of AlSi7Mg alloy in sand mold casting |
spellingShingle |
The role of acoustic pressure during solidification of AlSi7Mg alloy in sand mold casting Puga, Hélder Aluminum alloy Sand casting: Acoustic radiator Ultrasonic melt refinement α-Al grain size |
title_short |
The role of acoustic pressure during solidification of AlSi7Mg alloy in sand mold casting |
title_full |
The role of acoustic pressure during solidification of AlSi7Mg alloy in sand mold casting |
title_fullStr |
The role of acoustic pressure during solidification of AlSi7Mg alloy in sand mold casting |
title_full_unstemmed |
The role of acoustic pressure during solidification of AlSi7Mg alloy in sand mold casting |
title_sort |
The role of acoustic pressure during solidification of AlSi7Mg alloy in sand mold casting |
author |
Puga, Hélder |
author_facet |
Puga, Hélder Barbosa, J. Carneiro, Vítor Hugo Pimenta |
author_role |
author |
author2 |
Barbosa, J. Carneiro, Vítor Hugo Pimenta |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Puga, Hélder Barbosa, J. Carneiro, Vítor Hugo Pimenta |
dc.subject.por.fl_str_mv |
Aluminum alloy Sand casting: Acoustic radiator Ultrasonic melt refinement α-Al grain size |
topic |
Aluminum alloy Sand casting: Acoustic radiator Ultrasonic melt refinement α-Al grain size |
description |
New alloy processes have been developed and casting techniques are continuously evolving. Such constant development implies a consequent development and optimization of melt processing and treatment. The present work proposes a method for studying the influence of acoustic pressure in the overall refinement of sand cast aluminum alloys, using and correlating experimental and numerical approaches. It is shown that the refinement/modification of the α-Al matrix is a consequence of the acoustic activation caused in the liquid metal directly below the face of the acoustic radiator. Near the feeder, there is a clear homogeneity in the morphology of the α-Al with respect to grain size and grain circularity. However, the damping of acoustic pressure as the melt is moved away from the feeder increases and the influence of ultrasound is reduced, even though the higher cooling rate seems to compensate for this effect. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-04-27 2019-04-27T00:00:00Z |
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/1822/60294 |
url |
http://hdl.handle.net/1822/60294 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
2075-4701 10.3390/met9050490 |
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 |
Multidisciplinary Digital Publishing Institute |
publisher.none.fl_str_mv |
Multidisciplinary Digital Publishing Institute |
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 |
|
_version_ |
1799132298697768960 |