Repetitive nano-impact tests as a new tool to measure fracture toughness in brittle materials

Along this work, the feasibility of using repetitive-impact tests with a cube-corner tip and low loads for obtaining quantitative fracture toughness values will be shown. It will be displayed that the impacts are able to produce a cracking similar to the pattern developed for the classical fracture...

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Detalles Bibliográficos
Autores: Frutos, E., González-Carrasco, José Luis, Polcar, Tomás
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2016
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/143383
Acceso en línea:http://hdl.handle.net/10261/143383
Access Level:acceso abierto
Palabra clave:Dynamic hardness
High strain rate test
Fracture toughness
Nano-indentation
Repetitive-nano-impact test
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spelling Repetitive nano-impact tests as a new tool to measure fracture toughness in brittle materialsFrutos, E.González-Carrasco, José LuisPolcar, TomásDynamic hardnessHigh strain rate testFracture toughnessNano-indentationRepetitive-nano-impact testAlong this work, the feasibility of using repetitive-impact tests with a cube-corner tip and low loads for obtaining quantitative fracture toughness values will be shown. It will be displayed that the impacts are able to produce a cracking similar to the pattern developed for the classical fracture toughness tests in structural ceramics. Moreover, it will be shown how it is possible to identify the crack geometry evolution from Palmqvist crack to half-penny crack with each new impact being able to study the proper evolution of fracture toughness in terms of different indentation models and as a function of the strain rate, ε˙. Fracture toughness values of AlO descend from ∼6.10 MPam (ε˙=10s), to ∼3.52 MPam (ε˙=10s). These values correspond to those found in the literature for α-AlO demonstrating that the use of repetitive-nano-impact tests provides good reproducibility, high accuracy for reliable fracture toughness testing.The authors wish to express their thanks for the financial support of the Czech Science Foundation through the project 14-32801P. Nanoindentation was carried out on equipment funded by EPSRC through EP/K005103/1 project.Peer reviewedPeer ReviewedElsevierCzech Science FoundationEngineering and Physical Sciences Research Council (UK)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2017201720162017info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttp://hdl.handle.net/10261/143383reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1433832026-05-22T06:33:51Z
dc.title.none.fl_str_mv Repetitive nano-impact tests as a new tool to measure fracture toughness in brittle materials
title Repetitive nano-impact tests as a new tool to measure fracture toughness in brittle materials
spellingShingle Repetitive nano-impact tests as a new tool to measure fracture toughness in brittle materials
Frutos, E.
Dynamic hardness
High strain rate test
Fracture toughness
Nano-indentation
Repetitive-nano-impact test
title_short Repetitive nano-impact tests as a new tool to measure fracture toughness in brittle materials
title_full Repetitive nano-impact tests as a new tool to measure fracture toughness in brittle materials
title_fullStr Repetitive nano-impact tests as a new tool to measure fracture toughness in brittle materials
title_full_unstemmed Repetitive nano-impact tests as a new tool to measure fracture toughness in brittle materials
title_sort Repetitive nano-impact tests as a new tool to measure fracture toughness in brittle materials
dc.creator.none.fl_str_mv Frutos, E.
González-Carrasco, José Luis
Polcar, Tomás
author Frutos, E.
author_facet Frutos, E.
González-Carrasco, José Luis
Polcar, Tomás
author_role author
author2 González-Carrasco, José Luis
Polcar, Tomás
author2_role author
author
dc.contributor.none.fl_str_mv Czech Science Foundation
Engineering and Physical Sciences Research Council (UK)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Dynamic hardness
High strain rate test
Fracture toughness
Nano-indentation
Repetitive-nano-impact test
topic Dynamic hardness
High strain rate test
Fracture toughness
Nano-indentation
Repetitive-nano-impact test
description Along this work, the feasibility of using repetitive-impact tests with a cube-corner tip and low loads for obtaining quantitative fracture toughness values will be shown. It will be displayed that the impacts are able to produce a cracking similar to the pattern developed for the classical fracture toughness tests in structural ceramics. Moreover, it will be shown how it is possible to identify the crack geometry evolution from Palmqvist crack to half-penny crack with each new impact being able to study the proper evolution of fracture toughness in terms of different indentation models and as a function of the strain rate, ε˙. Fracture toughness values of AlO descend from ∼6.10 MPam (ε˙=10s), to ∼3.52 MPam (ε˙=10s). These values correspond to those found in the literature for α-AlO demonstrating that the use of repetitive-nano-impact tests provides good reproducibility, high accuracy for reliable fracture toughness testing.
publishDate 2016
dc.date.none.fl_str_mv 2016
2017
2017
2017
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/143383
url http://hdl.handle.net/10261/143383
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Sí
dc.rights.none.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 Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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