Influence of temperature on the biaxial strength of cemented carbides with different microstructures

The effect of the temperature on the mechanical strength of WC-Co cemented carbides with different microstructures (grain size and binder content) was evaluated. Biaxial flexural tests were performed on three cemented carbide grades at 600 °C using the ball-on-three-balls (B3B) method. Results were...

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Detalles Bibliográficos
Autores: Chicardi, E, Bermejo, Raul, Gotor Martínez, Francisco José, Llanes Pitarch, Luis Miguel|||0000-0003-1054-1073, Torres Hernández, Yadir
Tipo de recurso: artículo
Fecha de publicación:2017
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/111142
Acceso en línea:https://hdl.handle.net/2117/111142
https://dx.doi.org/10.1016/j.ijrmhm.2017.11.003
Access Level:acceso abierto
Palabra clave:Carbides
Temperature
Ball on three balls
Cemented carbides
Weibull statistics
biaxial flexural strength
Carburs
Temperatura
Àrees temàtiques de la UPC::Enginyeria dels materials
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spelling Influence of temperature on the biaxial strength of cemented carbides with different microstructuresChicardi, EBermejo, RaulGotor Martínez, Francisco JoséLlanes Pitarch, Luis Miguel|||0000-0003-1054-1073Torres Hernández, YadirCarbidesTemperatureBall on three ballsCemented carbidesTemperatureWeibull statisticsbiaxial flexural strengthCarbursTemperaturaÀrees temàtiques de la UPC::Enginyeria dels materialsThe effect of the temperature on the mechanical strength of WC-Co cemented carbides with different microstructures (grain size and binder content) was evaluated. Biaxial flexural tests were performed on three cemented carbide grades at 600 °C using the ball-on-three-balls (B3B) method. Results were interpreted by Weibull statistics and compared to biaxial strength results at room temperature. A detailed fractographic analysis, supported by Linear Elastic Fracture Mechanics, was performed to differentiate the nature and size of critical defects and the mechanism responsible for the fracture. A significant decrease in the mechanical strength (around 30%) was observed at 600 °C for all grades of cemented carbides. This fact was ascribed to the change in the critical flaw population from sub-surface (at room temperature) to surface defects, associated with the selective oxidation of Co. Additionally, an estimation of the fracture toughness at 600 °C was attempted for the three cemented carbides, based upon the B3B strength results, the corresponding number of the tested specimens fragments and the macroscopic area of the B3B fracture surfaces. The fracture toughness was not affected by the temperature, at least up to 600 °C. In addition, the good agreement with the Single Edge Notch Beam toughness data suggests the possibility of employing this approach for fracture toughness evaluation of brittle materials under different testing conditions.Peer Reviewed20182018-02-0120172017-11-24journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/111142https://dx.doi.org/10.1016/j.ijrmhm.2017.11.003reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/1111422026-05-27T15:37:01Z
dc.title.none.fl_str_mv Influence of temperature on the biaxial strength of cemented carbides with different microstructures
title Influence of temperature on the biaxial strength of cemented carbides with different microstructures
spellingShingle Influence of temperature on the biaxial strength of cemented carbides with different microstructures
Chicardi, E
Carbides
Temperature
Ball on three balls
Cemented carbides
Temperature
Weibull statistics
biaxial flexural strength
Carburs
Temperatura
Àrees temàtiques de la UPC::Enginyeria dels materials
title_short Influence of temperature on the biaxial strength of cemented carbides with different microstructures
title_full Influence of temperature on the biaxial strength of cemented carbides with different microstructures
title_fullStr Influence of temperature on the biaxial strength of cemented carbides with different microstructures
title_full_unstemmed Influence of temperature on the biaxial strength of cemented carbides with different microstructures
title_sort Influence of temperature on the biaxial strength of cemented carbides with different microstructures
dc.creator.none.fl_str_mv Chicardi, E
Bermejo, Raul
Gotor Martínez, Francisco José
Llanes Pitarch, Luis Miguel|||0000-0003-1054-1073
Torres Hernández, Yadir
author Chicardi, E
author_facet Chicardi, E
Bermejo, Raul
Gotor Martínez, Francisco José
Llanes Pitarch, Luis Miguel|||0000-0003-1054-1073
Torres Hernández, Yadir
author_role author
author2 Bermejo, Raul
Gotor Martínez, Francisco José
Llanes Pitarch, Luis Miguel|||0000-0003-1054-1073
Torres Hernández, Yadir
author2_role author
author
author
author
dc.subject.none.fl_str_mv Carbides
Temperature
Ball on three balls
Cemented carbides
Temperature
Weibull statistics
biaxial flexural strength
Carburs
Temperatura
Àrees temàtiques de la UPC::Enginyeria dels materials
topic Carbides
Temperature
Ball on three balls
Cemented carbides
Temperature
Weibull statistics
biaxial flexural strength
Carburs
Temperatura
Àrees temàtiques de la UPC::Enginyeria dels materials
description The effect of the temperature on the mechanical strength of WC-Co cemented carbides with different microstructures (grain size and binder content) was evaluated. Biaxial flexural tests were performed on three cemented carbide grades at 600 °C using the ball-on-three-balls (B3B) method. Results were interpreted by Weibull statistics and compared to biaxial strength results at room temperature. A detailed fractographic analysis, supported by Linear Elastic Fracture Mechanics, was performed to differentiate the nature and size of critical defects and the mechanism responsible for the fracture. A significant decrease in the mechanical strength (around 30%) was observed at 600 °C for all grades of cemented carbides. This fact was ascribed to the change in the critical flaw population from sub-surface (at room temperature) to surface defects, associated with the selective oxidation of Co. Additionally, an estimation of the fracture toughness at 600 °C was attempted for the three cemented carbides, based upon the B3B strength results, the corresponding number of the tested specimens fragments and the macroscopic area of the B3B fracture surfaces. The fracture toughness was not affected by the temperature, at least up to 600 °C. In addition, the good agreement with the Single Edge Notch Beam toughness data suggests the possibility of employing this approach for fracture toughness evaluation of brittle materials under different testing conditions.
publishDate 2017
dc.date.none.fl_str_mv 2017
2017-11-24
2018
2018-02-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/111142
https://dx.doi.org/10.1016/j.ijrmhm.2017.11.003
url https://hdl.handle.net/2117/111142
https://dx.doi.org/10.1016/j.ijrmhm.2017.11.003
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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