Indentation stress-based models to predict fracture properties of brittle thin film on a ductile substrate
In the present work, nano-indentation experiments were performed on the surface of alumina film and diamond-like carbon (DLC) film on PEEK substrates using an axisymmetric indenter. After indentation, ring cracks were noticed in the film by scanning electron microscope. Stress analysis results indic...
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Veröffentlicht in: | Surface & coatings technology 2016-06, Vol.296, p.46-57 |
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creator | Fu, Kunkun Chang, Li Ye, Lin Yin, Yongbai |
description | In the present work, nano-indentation experiments were performed on the surface of alumina film and diamond-like carbon (DLC) film on PEEK substrates using an axisymmetric indenter. After indentation, ring cracks were noticed in the film by scanning electron microscope. Stress analysis results indicated that radial tensile stress on the surface of the film outside the contact region of the indenter caused the ring crack. Then, two stress-based models were proposed to predict fracture stress and fracture toughness of brittle thin film on a ductile substrate based on the crack channeling criterion. The models were expressed regarding critical indentation load, ring crack radius, plastic zone radius, and film thickness. The stresses in film predicted by the present models were validated using axisymmetric finite element analysis. Finally, the models were utilized to evaluate fracture toughness of the alumina film and DLC film in experiments.
•Understand the fracture mechanism in brittle film on a ductile substrate by nanoindentation tests and FE analysis•Develop two stress-based models to obtain the stress distribution and fracture toughness in brittle films on a ductile substrate•Conduct an FE analysis using a conical indenter and a spherical indenter to validate the stress based models•Utilize the stress-based models to measure the fracture toughness of alumina film and DLC film on PEEK substrate |
doi_str_mv | 10.1016/j.surfcoat.2016.03.067 |
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•Understand the fracture mechanism in brittle film on a ductile substrate by nanoindentation tests and FE analysis•Develop two stress-based models to obtain the stress distribution and fracture toughness in brittle films on a ductile substrate•Conduct an FE analysis using a conical indenter and a spherical indenter to validate the stress based models•Utilize the stress-based models to measure the fracture toughness of alumina film and DLC film on PEEK substrate</description><identifier>ISSN: 0257-8972</identifier><identifier>EISSN: 1879-3347</identifier><identifier>DOI: 10.1016/j.surfcoat.2016.03.067</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>Axisymmetric ; Brittle thin film ; Diamond-like carbon films ; Ductile brittle transition ; Fracture mechanics ; Fracture toughness ; Indentation ; Indenters ; Mathematical models ; Nano-indentation ; Stress-based model ; Substrates ; Thin films</subject><ispartof>Surface & coatings technology, 2016-06, Vol.296, p.46-57</ispartof><rights>2016 Elsevier B.V.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c411t-eba25f2dfe3a5fc92fda51b47e5a95acc370b947e866747f5bed4f55467110e13</citedby><cites>FETCH-LOGICAL-c411t-eba25f2dfe3a5fc92fda51b47e5a95acc370b947e866747f5bed4f55467110e13</cites><orcidid>0000-0002-9079-0776</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0257897216301918$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids></links><search><creatorcontrib>Fu, Kunkun</creatorcontrib><creatorcontrib>Chang, Li</creatorcontrib><creatorcontrib>Ye, Lin</creatorcontrib><creatorcontrib>Yin, Yongbai</creatorcontrib><title>Indentation stress-based models to predict fracture properties of brittle thin film on a ductile substrate</title><title>Surface & coatings technology</title><description>In the present work, nano-indentation experiments were performed on the surface of alumina film and diamond-like carbon (DLC) film on PEEK substrates using an axisymmetric indenter. After indentation, ring cracks were noticed in the film by scanning electron microscope. Stress analysis results indicated that radial tensile stress on the surface of the film outside the contact region of the indenter caused the ring crack. Then, two stress-based models were proposed to predict fracture stress and fracture toughness of brittle thin film on a ductile substrate based on the crack channeling criterion. The models were expressed regarding critical indentation load, ring crack radius, plastic zone radius, and film thickness. The stresses in film predicted by the present models were validated using axisymmetric finite element analysis. Finally, the models were utilized to evaluate fracture toughness of the alumina film and DLC film in experiments.
•Understand the fracture mechanism in brittle film on a ductile substrate by nanoindentation tests and FE analysis•Develop two stress-based models to obtain the stress distribution and fracture toughness in brittle films on a ductile substrate•Conduct an FE analysis using a conical indenter and a spherical indenter to validate the stress based models•Utilize the stress-based models to measure the fracture toughness of alumina film and DLC film on PEEK substrate</description><subject>Axisymmetric</subject><subject>Brittle thin film</subject><subject>Diamond-like carbon films</subject><subject>Ductile brittle transition</subject><subject>Fracture mechanics</subject><subject>Fracture toughness</subject><subject>Indentation</subject><subject>Indenters</subject><subject>Mathematical models</subject><subject>Nano-indentation</subject><subject>Stress-based model</subject><subject>Substrates</subject><subject>Thin films</subject><issn>0257-8972</issn><issn>1879-3347</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqFkE9LxDAUxIMouK5-BcnRS2vSNs32piz-WVjwoueQJi-Y0jZrXir47Y2snj09ZpgZHj9CrjkrOePt7VDiEp0JOpVV1iWrS9bKE7LiG9kVdd3IU7JilZDFppPVOblAHBhjXHbNigy72cKcdPJhppgiIBa9RrB0ChZGpCnQQwTrTaIuapOWCNkIB4jJA9LgaB99SiPQ9O5n6vw40TylqV1M8tnGpc-7OsElOXN6RLj6vWvy9vjwun0u9i9Pu-39vjAN56mAXlfCVdZBrYUzXeWsFrxvJAjdCW1MLVnfZblpW9lIJ3qwjROiaSXnDHi9JjfH3fzmxwKY1OTRwDjqGcKCim94y3jd8i5H22PUxIAYwalD9JOOX4oz9QNXDeoPrvqBq1itMtxcvDsWMyL49BAVGg-zyaAimKRs8P9NfAMwjoly</recordid><startdate>20160625</startdate><enddate>20160625</enddate><creator>Fu, Kunkun</creator><creator>Chang, Li</creator><creator>Ye, Lin</creator><creator>Yin, Yongbai</creator><general>Elsevier B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><orcidid>https://orcid.org/0000-0002-9079-0776</orcidid></search><sort><creationdate>20160625</creationdate><title>Indentation stress-based models to predict fracture properties of brittle thin film on a ductile substrate</title><author>Fu, Kunkun ; Chang, Li ; Ye, Lin ; Yin, Yongbai</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c411t-eba25f2dfe3a5fc92fda51b47e5a95acc370b947e866747f5bed4f55467110e13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Axisymmetric</topic><topic>Brittle thin film</topic><topic>Diamond-like carbon films</topic><topic>Ductile brittle transition</topic><topic>Fracture mechanics</topic><topic>Fracture toughness</topic><topic>Indentation</topic><topic>Indenters</topic><topic>Mathematical models</topic><topic>Nano-indentation</topic><topic>Stress-based model</topic><topic>Substrates</topic><topic>Thin films</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Fu, Kunkun</creatorcontrib><creatorcontrib>Chang, Li</creatorcontrib><creatorcontrib>Ye, Lin</creatorcontrib><creatorcontrib>Yin, Yongbai</creatorcontrib><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Surface & coatings technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Fu, Kunkun</au><au>Chang, Li</au><au>Ye, Lin</au><au>Yin, Yongbai</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Indentation stress-based models to predict fracture properties of brittle thin film on a ductile substrate</atitle><jtitle>Surface & coatings technology</jtitle><date>2016-06-25</date><risdate>2016</risdate><volume>296</volume><spage>46</spage><epage>57</epage><pages>46-57</pages><issn>0257-8972</issn><eissn>1879-3347</eissn><abstract>In the present work, nano-indentation experiments were performed on the surface of alumina film and diamond-like carbon (DLC) film on PEEK substrates using an axisymmetric indenter. After indentation, ring cracks were noticed in the film by scanning electron microscope. Stress analysis results indicated that radial tensile stress on the surface of the film outside the contact region of the indenter caused the ring crack. Then, two stress-based models were proposed to predict fracture stress and fracture toughness of brittle thin film on a ductile substrate based on the crack channeling criterion. The models were expressed regarding critical indentation load, ring crack radius, plastic zone radius, and film thickness. The stresses in film predicted by the present models were validated using axisymmetric finite element analysis. Finally, the models were utilized to evaluate fracture toughness of the alumina film and DLC film in experiments.
•Understand the fracture mechanism in brittle film on a ductile substrate by nanoindentation tests and FE analysis•Develop two stress-based models to obtain the stress distribution and fracture toughness in brittle films on a ductile substrate•Conduct an FE analysis using a conical indenter and a spherical indenter to validate the stress based models•Utilize the stress-based models to measure the fracture toughness of alumina film and DLC film on PEEK substrate</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.surfcoat.2016.03.067</doi><tpages>12</tpages><orcidid>https://orcid.org/0000-0002-9079-0776</orcidid></addata></record> |
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subjects | Axisymmetric Brittle thin film Diamond-like carbon films Ductile brittle transition Fracture mechanics Fracture toughness Indentation Indenters Mathematical models Nano-indentation Stress-based model Substrates Thin films |
title | Indentation stress-based models to predict fracture properties of brittle thin film on a ductile substrate |
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