A theta projection model for compressive creep behaviour of refractories at high temperature: application to alumina-spinel
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | https://hdl.handle.net/1822/88408 |
Resumo: | Thermomechanical loads are normally applied to refractory materials throughout their service life whichever is their practical use (e.g. steel ladle, rotary kiln furnaces). Among all the phenomena that the refractories are exposed to, the influence of creep behaviour is essential in determining their performance. Creep of refractories is usually represented by simple creep laws such as Norton-Bailey, which lack the capacity for generalization. The theta projection creep method, on the other hand, was proposed in the twentieth century to predict the creep of metals and alloys across different temperatures and stresses. The model is represented by one exponential equation capable of representing the complete creep curve, and coefficients that are temperature and stress-dependent, thus enabling the representation of complex nonlinear creep behaviour. Since refractories have similar creep responses to metals, the theta projection creep model is validated to characterize the compressive creep behaviour of alumina-spinel refractories at temperatures between 1200 and 1500 °C. Creep data from steady-state and transient temperature creep tests are used to calibrate the model. A regression by the least square method is applied to calculate the model’s parameters. The model shows good flexibility in fitting the test data of the alumina-spinel refractory over the three creep stages. A temperature and stress dependence model is derived for the theta coefficients, reducing the number of material parameters necessary to describe the material's behaviour. The experimental creep curves are presented, as well as the curves resulting from the identified parameters. The implications of the chosen creep data set on the definition of the model and its adequacy for this novel application are discussed. |
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A theta projection model for compressive creep behaviour of refractories at high temperature: application to alumina-spinelAlumina-spinelCompressive creepRefractoriesSteel industryTheta projection methodThermomechanical loads are normally applied to refractory materials throughout their service life whichever is their practical use (e.g. steel ladle, rotary kiln furnaces). Among all the phenomena that the refractories are exposed to, the influence of creep behaviour is essential in determining their performance. Creep of refractories is usually represented by simple creep laws such as Norton-Bailey, which lack the capacity for generalization. The theta projection creep method, on the other hand, was proposed in the twentieth century to predict the creep of metals and alloys across different temperatures and stresses. The model is represented by one exponential equation capable of representing the complete creep curve, and coefficients that are temperature and stress-dependent, thus enabling the representation of complex nonlinear creep behaviour. Since refractories have similar creep responses to metals, the theta projection creep model is validated to characterize the compressive creep behaviour of alumina-spinel refractories at temperatures between 1200 and 1500 °C. Creep data from steady-state and transient temperature creep tests are used to calibrate the model. A regression by the least square method is applied to calculate the model’s parameters. The model shows good flexibility in fitting the test data of the alumina-spinel refractory over the three creep stages. A temperature and stress dependence model is derived for the theta coefficients, reducing the number of material parameters necessary to describe the material's behaviour. The experimental creep curves are presented, as well as the curves resulting from the identified parameters. The implications of the chosen creep data set on the definition of the model and its adequacy for this novel application are discussed.This work was supported by the funding scheme of the European Commission, Marie SkłodowskaCurie Actions Innovative Training Networks in the frame of the project ATHOR—Advanced THermomechanical multi scale mOdelling of Refractory linings 764987 Grant. This work was partly fnanced by FCT / MCTES through national funds (PIDDAC) under the R&D Unit Institute for Sustainability and Innovation in Structural Engineering (ISISE), under reference UIDB / 04029/2020, and under the Associate Laboratory Advanced Production and Intelligent Systems ARISE under reference LA/P/0112/2020. The authors acknowledge the colleagues from Montanuniversitaet in Leoben, S. Samadi and D. Gruber for the meaningful discussions. The authors would like to thank the reviewer for the insightful comments and suggestions, and the valuable discussion proposed, which helped to improve the quality of the manuscriptSpringerUniversidade do MinhoSoares, Thaís R. L.Kieliba, IlonaAzenha, MiguelTonnesen, ThorstenLourenço, Paulo B.2023-122023-12-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/88408engSoares, T.R.L., Kieliba, I., Azenha, M. et al. A theta projection model for compressive creep behaviour of refractories at high temperature: application to alumina-spinel. Meccanica 58, 2401–2420 (2023). https://doi.org/10.1007/s11012-023-01734-60025-64551572-964810.1007/s11012-023-01734-6https://link.springer.com/article/10.1007/s11012-023-01734-6info: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:RCAAP2024-02-03T01:20:45Zoai:repositorium.sdum.uminho.pt:1822/88408Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:07:31.179106Repositório 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 |
A theta projection model for compressive creep behaviour of refractories at high temperature: application to alumina-spinel |
title |
A theta projection model for compressive creep behaviour of refractories at high temperature: application to alumina-spinel |
spellingShingle |
A theta projection model for compressive creep behaviour of refractories at high temperature: application to alumina-spinel Soares, Thaís R. L. Alumina-spinel Compressive creep Refractories Steel industry Theta projection method |
title_short |
A theta projection model for compressive creep behaviour of refractories at high temperature: application to alumina-spinel |
title_full |
A theta projection model for compressive creep behaviour of refractories at high temperature: application to alumina-spinel |
title_fullStr |
A theta projection model for compressive creep behaviour of refractories at high temperature: application to alumina-spinel |
title_full_unstemmed |
A theta projection model for compressive creep behaviour of refractories at high temperature: application to alumina-spinel |
title_sort |
A theta projection model for compressive creep behaviour of refractories at high temperature: application to alumina-spinel |
author |
Soares, Thaís R. L. |
author_facet |
Soares, Thaís R. L. Kieliba, Ilona Azenha, Miguel Tonnesen, Thorsten Lourenço, Paulo B. |
author_role |
author |
author2 |
Kieliba, Ilona Azenha, Miguel Tonnesen, Thorsten Lourenço, Paulo B. |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Soares, Thaís R. L. Kieliba, Ilona Azenha, Miguel Tonnesen, Thorsten Lourenço, Paulo B. |
dc.subject.por.fl_str_mv |
Alumina-spinel Compressive creep Refractories Steel industry Theta projection method |
topic |
Alumina-spinel Compressive creep Refractories Steel industry Theta projection method |
description |
Thermomechanical loads are normally applied to refractory materials throughout their service life whichever is their practical use (e.g. steel ladle, rotary kiln furnaces). Among all the phenomena that the refractories are exposed to, the influence of creep behaviour is essential in determining their performance. Creep of refractories is usually represented by simple creep laws such as Norton-Bailey, which lack the capacity for generalization. The theta projection creep method, on the other hand, was proposed in the twentieth century to predict the creep of metals and alloys across different temperatures and stresses. The model is represented by one exponential equation capable of representing the complete creep curve, and coefficients that are temperature and stress-dependent, thus enabling the representation of complex nonlinear creep behaviour. Since refractories have similar creep responses to metals, the theta projection creep model is validated to characterize the compressive creep behaviour of alumina-spinel refractories at temperatures between 1200 and 1500 °C. Creep data from steady-state and transient temperature creep tests are used to calibrate the model. A regression by the least square method is applied to calculate the model’s parameters. The model shows good flexibility in fitting the test data of the alumina-spinel refractory over the three creep stages. A temperature and stress dependence model is derived for the theta coefficients, reducing the number of material parameters necessary to describe the material's behaviour. The experimental creep curves are presented, as well as the curves resulting from the identified parameters. The implications of the chosen creep data set on the definition of the model and its adequacy for this novel application are discussed. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-12 2023-12-01T00:00:00Z |
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 |
https://hdl.handle.net/1822/88408 |
url |
https://hdl.handle.net/1822/88408 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Soares, T.R.L., Kieliba, I., Azenha, M. et al. A theta projection model for compressive creep behaviour of refractories at high temperature: application to alumina-spinel. Meccanica 58, 2401–2420 (2023). https://doi.org/10.1007/s11012-023-01734-6 0025-6455 1572-9648 10.1007/s11012-023-01734-6 https://link.springer.com/article/10.1007/s11012-023-01734-6 |
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 |
Springer |
publisher.none.fl_str_mv |
Springer |
dc.source.none.fl_str_mv |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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