Exploring Solutions to Mitigate Unidirectional Grain Growth and to Set Operational Envelop for Wire + Arc Additive Manufacturing of Aluminium Alloys
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFU |
Texto Completo: | https://repositorio.ufu.br/handle/123456789/22582 http://dx.doi.org/10.14393/ufu.di.2018.574 |
Resumo: | Wire Arc Additive Manufacturing (WAAM) is a novel process with high industrial application. However, there are still some limitations, such as anisotropy of mechanical properties, which delays a wide implementation of WAAM. Moreover, as long as WAAM is a new technology, its operational envelope is not utterly known. The first objective of this work was to assess solutions to mitigate unidirectional grain growth in WAAM of aluminium, that leads to anisotropy of the mechanical properties of the printed part. In the scope of this objective, two methodological approaches were employed. The first approach used the switchback welding technique in comparison with a reference (the conventional unidirectional deposition) and also a traditional method for reduce unidirectional growth (bidirectional deposition). The second one used nanoparticles inoculation in the deposited metal. Both approaches showed ability to mitigate epitaxial growth of big columnar grains and to refine microstructure, however switchback technique show to be easier to implement. The second objective of this work was to find an operational envelope of the process, i.e., a range of travel speeds for a given deposition rate and for a given ratio deposition rate/travel speed. This study showed there are a range of pool volume during the deposition that must be respected to reach sound printed walls. |
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Exploring Solutions to Mitigate Unidirectional Grain Growth and to Set Operational Envelop for Wire + Arc Additive Manufacturing of Aluminium AlloysExplorando Soluções para Mitigar o Crescimento Unidirecional de Grãos e para Estabelecer Envelopes Operacionais para Wire + Arc Additive Manufacturing de Ligas de AlumínioВивчення рішень для подолання однонаправленого зростання зерна та для визначення операційних меж для Wire Arc Additive Manufacturing алюмінієвих сплавівWAAMAluminiumSwitchbackInoculationAlumínioInoculaçãoAлюмінійІнокуляціяEngenharia mecânicaProcessos de fabricaçãoEngenharia industrialCNPQ::ENGENHARIAS::ENGENHARIA MECANICA::PROCESSOS DE FABRICACAO::PROCESSOS DE FABRICACAO, SELECAO ECONOMICAWire Arc Additive Manufacturing (WAAM) is a novel process with high industrial application. However, there are still some limitations, such as anisotropy of mechanical properties, which delays a wide implementation of WAAM. Moreover, as long as WAAM is a new technology, its operational envelope is not utterly known. The first objective of this work was to assess solutions to mitigate unidirectional grain growth in WAAM of aluminium, that leads to anisotropy of the mechanical properties of the printed part. In the scope of this objective, two methodological approaches were employed. The first approach used the switchback welding technique in comparison with a reference (the conventional unidirectional deposition) and also a traditional method for reduce unidirectional growth (bidirectional deposition). The second one used nanoparticles inoculation in the deposited metal. Both approaches showed ability to mitigate epitaxial growth of big columnar grains and to refine microstructure, however switchback technique show to be easier to implement. The second objective of this work was to find an operational envelope of the process, i.e., a range of travel speeds for a given deposition rate and for a given ratio deposition rate/travel speed. This study showed there are a range of pool volume during the deposition that must be respected to reach sound printed walls.CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorDissertação (Mestrado)Wire Arc Additive Manufacturing (WAAM) é um novo processo com alta potencial de aplicação industrial. No entanto, ainda existem algumas limitações, como a anisotropia das propriedades mecânicas, que atrasa uma ampla implementação do WAAM. Além disso, enquanto WAAM é uma nova tecnologia, seu envelope operacional não é totalmente conhecido. O primeiro objetivo deste trabalho foi avaliar soluções para mitigar o crescimento unidirecional de grãos em alumínio por WAAM, o que leva à anisotropia das propriedades mecânicas da parte impressa. No âmbito deste objetivo, duas abordagens metodológicas foram empregadas. A primeira abordagem utilizou a técnica de soldagem de reversão em comparação com uma referência (a deposição unidirecional convencional) e um método tradicional para reduzir o crescimento unidirecional (deposição bidirecional). Uma segunda utilizou inoculação no metal depositado por nanopartículas. Ambas as abordagens mostraram capacidade de mitigar o crescimento epitaxial de grandes grãos colunares e refinar a microestrutura, no entanto, a técnica de reversão mostrou ser mais fácil de implementar. O segundo objetivo deste trabalho foi encontrar um envelope operacional do processo, ou seja, uma faixa de velocidades de deslocamento para uma determinada taxa de deposição e para uma determinada relação de taxa de deposição / velocidade de deslocamento. Este estudo mostrou que há uma faixa de volume do banho em fusão durante a deposição que deve ser respeitada para alcançar paredes impressas com boa qualidade.Universidade Federal de UberlândiaBrasilPrograma de Pós-graduação em Engenharia MecânicaScotti, Américohttp://lattes.cnpq.br/5719116057125057Vilarinho, Louriel Oliveirahttp://lattes.cnpq.br/8553716610264673Chvertko, YevgeniaHenke, Sérgio Luizhttp://lattes.cnpq.br/0065527092468688Yehorov, Yurii2018-10-16T13:48:16Z2018-10-16T13:48:16Z2018-08-07info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfYEHOROV, Yurii. Exploring Solutions to Mitigate Unidirectional Grain Growth and to Set Operational Envelop for Wire + Arc Additive Manufacturing of Aluminium Alloys. 2018. 92 f. Dissertação (Mestrado em Engenharia Mecânica) - Universidade Federal de Uberlândia, Uberlândia, 2018.DOI http://dx.doi.org/10.14393/ufu.di.2018.574.https://repositorio.ufu.br/handle/123456789/22582http://dx.doi.org/10.14393/ufu.di.2018.574enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFUinstname:Universidade Federal de Uberlândia (UFU)instacron:UFU2018-10-16T13:48:45Zoai:repositorio.ufu.br:123456789/22582Repositório InstitucionalONGhttp://repositorio.ufu.br/oai/requestdiinf@dirbi.ufu.bropendoar:2018-10-16T13:48:45Repositório Institucional da UFU - Universidade Federal de Uberlândia (UFU)false |
dc.title.none.fl_str_mv |
Exploring Solutions to Mitigate Unidirectional Grain Growth and to Set Operational Envelop for Wire + Arc Additive Manufacturing of Aluminium Alloys Explorando Soluções para Mitigar o Crescimento Unidirecional de Grãos e para Estabelecer Envelopes Operacionais para Wire + Arc Additive Manufacturing de Ligas de Alumínio Вивчення рішень для подолання однонаправленого зростання зерна та для визначення операційних меж для Wire Arc Additive Manufacturing алюмінієвих сплавів |
title |
Exploring Solutions to Mitigate Unidirectional Grain Growth and to Set Operational Envelop for Wire + Arc Additive Manufacturing of Aluminium Alloys |
spellingShingle |
Exploring Solutions to Mitigate Unidirectional Grain Growth and to Set Operational Envelop for Wire + Arc Additive Manufacturing of Aluminium Alloys Yehorov, Yurii WAAM Aluminium Switchback Inoculation Alumínio Inoculação Aлюміній Інокуляція Engenharia mecânica Processos de fabricação Engenharia industrial CNPQ::ENGENHARIAS::ENGENHARIA MECANICA::PROCESSOS DE FABRICACAO::PROCESSOS DE FABRICACAO, SELECAO ECONOMICA |
title_short |
Exploring Solutions to Mitigate Unidirectional Grain Growth and to Set Operational Envelop for Wire + Arc Additive Manufacturing of Aluminium Alloys |
title_full |
Exploring Solutions to Mitigate Unidirectional Grain Growth and to Set Operational Envelop for Wire + Arc Additive Manufacturing of Aluminium Alloys |
title_fullStr |
Exploring Solutions to Mitigate Unidirectional Grain Growth and to Set Operational Envelop for Wire + Arc Additive Manufacturing of Aluminium Alloys |
title_full_unstemmed |
Exploring Solutions to Mitigate Unidirectional Grain Growth and to Set Operational Envelop for Wire + Arc Additive Manufacturing of Aluminium Alloys |
title_sort |
Exploring Solutions to Mitigate Unidirectional Grain Growth and to Set Operational Envelop for Wire + Arc Additive Manufacturing of Aluminium Alloys |
author |
Yehorov, Yurii |
author_facet |
Yehorov, Yurii |
author_role |
author |
dc.contributor.none.fl_str_mv |
Scotti, Américo http://lattes.cnpq.br/5719116057125057 Vilarinho, Louriel Oliveira http://lattes.cnpq.br/8553716610264673 Chvertko, Yevgenia Henke, Sérgio Luiz http://lattes.cnpq.br/0065527092468688 |
dc.contributor.author.fl_str_mv |
Yehorov, Yurii |
dc.subject.por.fl_str_mv |
WAAM Aluminium Switchback Inoculation Alumínio Inoculação Aлюміній Інокуляція Engenharia mecânica Processos de fabricação Engenharia industrial CNPQ::ENGENHARIAS::ENGENHARIA MECANICA::PROCESSOS DE FABRICACAO::PROCESSOS DE FABRICACAO, SELECAO ECONOMICA |
topic |
WAAM Aluminium Switchback Inoculation Alumínio Inoculação Aлюміній Інокуляція Engenharia mecânica Processos de fabricação Engenharia industrial CNPQ::ENGENHARIAS::ENGENHARIA MECANICA::PROCESSOS DE FABRICACAO::PROCESSOS DE FABRICACAO, SELECAO ECONOMICA |
description |
Wire Arc Additive Manufacturing (WAAM) is a novel process with high industrial application. However, there are still some limitations, such as anisotropy of mechanical properties, which delays a wide implementation of WAAM. Moreover, as long as WAAM is a new technology, its operational envelope is not utterly known. The first objective of this work was to assess solutions to mitigate unidirectional grain growth in WAAM of aluminium, that leads to anisotropy of the mechanical properties of the printed part. In the scope of this objective, two methodological approaches were employed. The first approach used the switchback welding technique in comparison with a reference (the conventional unidirectional deposition) and also a traditional method for reduce unidirectional growth (bidirectional deposition). The second one used nanoparticles inoculation in the deposited metal. Both approaches showed ability to mitigate epitaxial growth of big columnar grains and to refine microstructure, however switchback technique show to be easier to implement. The second objective of this work was to find an operational envelope of the process, i.e., a range of travel speeds for a given deposition rate and for a given ratio deposition rate/travel speed. This study showed there are a range of pool volume during the deposition that must be respected to reach sound printed walls. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-10-16T13:48:16Z 2018-10-16T13:48:16Z 2018-08-07 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
YEHOROV, Yurii. Exploring Solutions to Mitigate Unidirectional Grain Growth and to Set Operational Envelop for Wire + Arc Additive Manufacturing of Aluminium Alloys. 2018. 92 f. Dissertação (Mestrado em Engenharia Mecânica) - Universidade Federal de Uberlândia, Uberlândia, 2018.DOI http://dx.doi.org/10.14393/ufu.di.2018.574. https://repositorio.ufu.br/handle/123456789/22582 http://dx.doi.org/10.14393/ufu.di.2018.574 |
identifier_str_mv |
YEHOROV, Yurii. Exploring Solutions to Mitigate Unidirectional Grain Growth and to Set Operational Envelop for Wire + Arc Additive Manufacturing of Aluminium Alloys. 2018. 92 f. Dissertação (Mestrado em Engenharia Mecânica) - Universidade Federal de Uberlândia, Uberlândia, 2018.DOI http://dx.doi.org/10.14393/ufu.di.2018.574. |
url |
https://repositorio.ufu.br/handle/123456789/22582 http://dx.doi.org/10.14393/ufu.di.2018.574 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
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 |
Universidade Federal de Uberlândia Brasil Programa de Pós-graduação em Engenharia Mecânica |
publisher.none.fl_str_mv |
Universidade Federal de Uberlândia Brasil Programa de Pós-graduação em Engenharia Mecânica |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFU instname:Universidade Federal de Uberlândia (UFU) instacron:UFU |
instname_str |
Universidade Federal de Uberlândia (UFU) |
instacron_str |
UFU |
institution |
UFU |
reponame_str |
Repositório Institucional da UFU |
collection |
Repositório Institucional da UFU |
repository.name.fl_str_mv |
Repositório Institucional da UFU - Universidade Federal de Uberlândia (UFU) |
repository.mail.fl_str_mv |
diinf@dirbi.ufu.br |
_version_ |
1805569673622716416 |