Fracture mechanical testing of single crystal notched a-iron micro-cantilevers
Fracture mechanical testing of micro-sized cantilevers was conducted in order to quantify the fracture toughness and modes of fracture for the ... and ... crack systems in α-iron. The testing was performed at both room temperature and at -75 °C. Previous molecular dynamics analysis has indicated bri...
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| Veröffentlicht in: | Engineering fracture mechanics 2017-04, Vol.175, p.312 |
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| container_title | Engineering fracture mechanics |
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| creator | Snartland, BD Hagen, AB Thaulow, C |
| description | Fracture mechanical testing of micro-sized cantilevers was conducted in order to quantify the fracture toughness and modes of fracture for the ... and ... crack systems in α-iron. The testing was performed at both room temperature and at -75 °C. Previous molecular dynamics analysis has indicated brittle behavior for the ... and ductile behavior for the ... orientation, giving rise to the question; could this be achieved with testing at the micro-level. Elastic-plastic fracture mechanics was applied due to the small sample size, rendering the cantilevers out of bounds in relation to linear-elastic fracture mechanics boundaries. Conditional fracture parameters, KQ and JQ, were determined through the load-displacement curves where the change in unloading stiffness was used to determine crack growth. The crack growth was corrected to fit micrograph measurements. By normalizing the JQ vs. crack growth curves with its critical values, a new characterization tool was deemed applicable and proved promising in characterizing fracture behavior. |
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The testing was performed at both room temperature and at -75 °C. Previous molecular dynamics analysis has indicated brittle behavior for the ... and ductile behavior for the ... orientation, giving rise to the question; could this be achieved with testing at the micro-level. Elastic-plastic fracture mechanics was applied due to the small sample size, rendering the cantilevers out of bounds in relation to linear-elastic fracture mechanics boundaries. Conditional fracture parameters, KQ and JQ, were determined through the load-displacement curves where the change in unloading stiffness was used to determine crack growth. The crack growth was corrected to fit micrograph measurements. 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By normalizing the JQ vs. crack growth curves with its critical values, a new characterization tool was deemed applicable and proved promising in characterizing fracture behavior.</description><subject>Alpha iron</subject><subject>Brittleness</subject><subject>Crack propagation</subject><subject>Cracks</subject><subject>Ductile-brittle transition</subject><subject>Fracture mechanics</subject><subject>Fracture toughness</subject><subject>Iron</subject><subject>Mechanical tests</subject><subject>Molecular dynamics</subject><subject>Normalizing</subject><subject>Stiffness</subject><issn>0013-7944</issn><issn>1873-7315</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNqNjMsKwjAUBYMoWB__EHAdSEyfa7G4cuW-hHhrU9JEb1LBvzcLP8DVHJjhLEgm6kqySopiSTLORdpNnq_JJoSRc16VNc_ItUWl44xAJ9CDckYrSyOEaNyD-p6GRAtU4yfEZJyPeoA7Vcygd3QyGj3TykVj4Q0YdmTVKxtg_-OWHNrz7XRhT_SvOd12o5_RJdWJRh550ZSikP9VXySwQBM</recordid><startdate>20170415</startdate><enddate>20170415</enddate><creator>Snartland, BD</creator><creator>Hagen, AB</creator><creator>Thaulow, C</creator><general>Elsevier BV</general><scope>7SR</scope><scope>7TB</scope><scope>8BQ</scope><scope>8FD</scope><scope>FR3</scope><scope>JG9</scope><scope>KR7</scope></search><sort><creationdate>20170415</creationdate><title>Fracture mechanical testing of single crystal notched a-iron micro-cantilevers</title><author>Snartland, BD ; Hagen, AB ; Thaulow, C</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-proquest_journals_19320596153</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Alpha iron</topic><topic>Brittleness</topic><topic>Crack propagation</topic><topic>Cracks</topic><topic>Ductile-brittle transition</topic><topic>Fracture mechanics</topic><topic>Fracture toughness</topic><topic>Iron</topic><topic>Mechanical tests</topic><topic>Molecular dynamics</topic><topic>Normalizing</topic><topic>Stiffness</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Snartland, BD</creatorcontrib><creatorcontrib>Hagen, AB</creatorcontrib><creatorcontrib>Thaulow, C</creatorcontrib><collection>Engineered Materials Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Engineering fracture mechanics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Snartland, BD</au><au>Hagen, AB</au><au>Thaulow, C</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Fracture mechanical testing of single crystal notched a-iron micro-cantilevers</atitle><jtitle>Engineering fracture mechanics</jtitle><date>2017-04-15</date><risdate>2017</risdate><volume>175</volume><spage>312</spage><pages>312-</pages><issn>0013-7944</issn><eissn>1873-7315</eissn><abstract>Fracture mechanical testing of micro-sized cantilevers was conducted in order to quantify the fracture toughness and modes of fracture for the ... and ... crack systems in α-iron. 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| ispartof | Engineering fracture mechanics, 2017-04, Vol.175, p.312 |
| issn | 0013-7944 1873-7315 |
| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Alpha iron Brittleness Crack propagation Cracks Ductile-brittle transition Fracture mechanics Fracture toughness Iron Mechanical tests Molecular dynamics Normalizing Stiffness |
| title | Fracture mechanical testing of single crystal notched a-iron micro-cantilevers |
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