Active learning of eutectic phase diagram in engineering courses

Detalhes bibliográficos
Autor(a) principal: Hehnes, Erika Figueiredo
Data de Publicação: 2021
Outros Autores: Souza, Paula Carolina de, Dutra, Júlio César
Tipo de documento: Artigo
Idioma: eng
Título da fonte: The Journal of Engineering and Exact Sciences
Texto Completo: https://periodicos.ufv.br/jcec/article/view/12606
Resumo: The present article shows a new strategy used to cover phase diagrams for undergraduate mechanical engineering students. It is based on active learning in which students are required to investigate experimentally three different eutectic alloys by using X-ray diffraction and metallography. The first technique allows students to use Rietveld analysis to obtain the mass fraction of the present phases and they must compare their results with those obtained theoretically whilst the second one is used to characterize those phases and measured their area fractions. From these results, they can also compare them with those obtained theoretically, but considering the density of different phases. The results have shown that students understood more clearly concepts such as the lever rule, and the very interpretation of phase diagram: the liquidus and solidus curve and finally the eutectic point.  
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spelling Active learning of eutectic phase diagram in engineering coursesAbordagem ativa para o estudo de diagrama de fases eutético nos cursos de engenhariaEutectic phase diagram. X-ray diffraction. Metallography.Diagrama de fases eutético. Difração de raios-X. Metalografia.The present article shows a new strategy used to cover phase diagrams for undergraduate mechanical engineering students. It is based on active learning in which students are required to investigate experimentally three different eutectic alloys by using X-ray diffraction and metallography. The first technique allows students to use Rietveld analysis to obtain the mass fraction of the present phases and they must compare their results with those obtained theoretically whilst the second one is used to characterize those phases and measured their area fractions. From these results, they can also compare them with those obtained theoretically, but considering the density of different phases. The results have shown that students understood more clearly concepts such as the lever rule, and the very interpretation of phase diagram: the liquidus and solidus curve and finally the eutectic point.  O presente trabalho apresenta um modo de tornar o assunto de diagrama de fases menos teórico e mais desafiante para alunos do curso de engenharia mecânica. Ele é baseado na aprendizagem ativa, ou seja, os alunos são instados a conhecer o diagrama de fases eutético por meio de dois experimentos: a difração de raios-X e a caracterização por metalografia. No primeiro, os alunos devem obter um difratograma e utilizar a análise de Rietveld por meio de software específico para a determinação da fração mássica de três diferentes ligas eutéticas. Em seguida, eles devem comparar esses resultados com aqueles apresentados pelo diagrama de fases teórico após cálculo da regra da alavanca. No segundo, os alunos devem usar um software de análise de imagens para a determinação da fração em área das fases presentes e comparar os resultados com o diagrama de fases teórico, levando em conta as densidades das fases presentes para que a comparação seja possível. Os alunos foram entrevistados ao final das aulas e apreciaram o fato de os experimentos, acrescido do uso dos softwares, terem permitido o entendimento do diagrama de fases de um modo no qual eles são os principais atores de seu próprio aprendizado.    Universidade Federal de Viçosa - UFV2021-06-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufv.br/jcec/article/view/1260610.18540/jcecvl7iss3pp12606-01-13eThe Journal of Engineering and Exact Sciences; Vol. 7 No. 3 (2021); 12606-01-13eThe Journal of Engineering and Exact Sciences; Vol. 7 Núm. 3 (2021); 12606-01-13eThe Journal of Engineering and Exact Sciences; v. 7 n. 3 (2021); 12606-01-13e2527-1075reponame:The Journal of Engineering and Exact Sciencesinstname:Universidade Federal de Viçosa (UFV)instacron:UFVenghttps://periodicos.ufv.br/jcec/article/view/12606/6669Copyright (c) 2021 The Journal of Engineering and Exact Scienceshttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessHehnes, Erika FigueiredoSouza, Paula Carolina deDutra, Júlio César2021-08-16T18:50:11Zoai:ojs.periodicos.ufv.br:article/12606Revistahttp://www.seer.ufv.br/seer/rbeq2/index.php/req2/oai2527-10752527-1075opendoar:2021-08-16T18:50:11The Journal of Engineering and Exact Sciences - Universidade Federal de Viçosa (UFV)false
dc.title.none.fl_str_mv Active learning of eutectic phase diagram in engineering courses
Abordagem ativa para o estudo de diagrama de fases eutético nos cursos de engenharia
title Active learning of eutectic phase diagram in engineering courses
spellingShingle Active learning of eutectic phase diagram in engineering courses
Hehnes, Erika Figueiredo
Eutectic phase diagram. X-ray diffraction. Metallography.
Diagrama de fases eutético. Difração de raios-X. Metalografia.
title_short Active learning of eutectic phase diagram in engineering courses
title_full Active learning of eutectic phase diagram in engineering courses
title_fullStr Active learning of eutectic phase diagram in engineering courses
title_full_unstemmed Active learning of eutectic phase diagram in engineering courses
title_sort Active learning of eutectic phase diagram in engineering courses
author Hehnes, Erika Figueiredo
author_facet Hehnes, Erika Figueiredo
Souza, Paula Carolina de
Dutra, Júlio César
author_role author
author2 Souza, Paula Carolina de
Dutra, Júlio César
author2_role author
author
dc.contributor.author.fl_str_mv Hehnes, Erika Figueiredo
Souza, Paula Carolina de
Dutra, Júlio César
dc.subject.por.fl_str_mv Eutectic phase diagram. X-ray diffraction. Metallography.
Diagrama de fases eutético. Difração de raios-X. Metalografia.
topic Eutectic phase diagram. X-ray diffraction. Metallography.
Diagrama de fases eutético. Difração de raios-X. Metalografia.
description The present article shows a new strategy used to cover phase diagrams for undergraduate mechanical engineering students. It is based on active learning in which students are required to investigate experimentally three different eutectic alloys by using X-ray diffraction and metallography. The first technique allows students to use Rietveld analysis to obtain the mass fraction of the present phases and they must compare their results with those obtained theoretically whilst the second one is used to characterize those phases and measured their area fractions. From these results, they can also compare them with those obtained theoretically, but considering the density of different phases. The results have shown that students understood more clearly concepts such as the lever rule, and the very interpretation of phase diagram: the liquidus and solidus curve and finally the eutectic point.  
publishDate 2021
dc.date.none.fl_str_mv 2021-06-10
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://periodicos.ufv.br/jcec/article/view/12606
10.18540/jcecvl7iss3pp12606-01-13e
url https://periodicos.ufv.br/jcec/article/view/12606
identifier_str_mv 10.18540/jcecvl7iss3pp12606-01-13e
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://periodicos.ufv.br/jcec/article/view/12606/6669
dc.rights.driver.fl_str_mv Copyright (c) 2021 The Journal of Engineering and Exact Sciences
https://creativecommons.org/licenses/by/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2021 The Journal of Engineering and Exact Sciences
https://creativecommons.org/licenses/by/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Viçosa - UFV
publisher.none.fl_str_mv Universidade Federal de Viçosa - UFV
dc.source.none.fl_str_mv The Journal of Engineering and Exact Sciences; Vol. 7 No. 3 (2021); 12606-01-13e
The Journal of Engineering and Exact Sciences; Vol. 7 Núm. 3 (2021); 12606-01-13e
The Journal of Engineering and Exact Sciences; v. 7 n. 3 (2021); 12606-01-13e
2527-1075
reponame:The Journal of Engineering and Exact Sciences
instname:Universidade Federal de Viçosa (UFV)
instacron:UFV
instname_str Universidade Federal de Viçosa (UFV)
instacron_str UFV
institution UFV
reponame_str The Journal of Engineering and Exact Sciences
collection The Journal of Engineering and Exact Sciences
repository.name.fl_str_mv The Journal of Engineering and Exact Sciences - Universidade Federal de Viçosa (UFV)
repository.mail.fl_str_mv
_version_ 1808845246916722688

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