Role of composition heterogeneity on fracture micromechanisms of nodular cast iron
The aim of the present study is to explain the role of chemical composition and heterogeneity within the microstructure of nodular cast iron on the micromechanisms of fracture. The heterogeneity in chemical composition is revealed by a thorough study of the microstructure using scanning electron mic...
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| Veröffentlicht in: | Materials science and technology 2006-12, Vol.22 (12), p.1415-1422 |
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| creator | Konečná, R. Lejček, P. Nicoletto, G. Bartuška, P. |
| description | The aim of the present study is to explain the role of chemical composition and heterogeneity within the microstructure of nodular cast iron on the micromechanisms of fracture. The heterogeneity in chemical composition is revealed by a thorough study of the microstructure using scanning electron microscopy, Auger electron spectroscopy and colour etching. The ferritic phase surrounding the graphite globules is enriched by silicon and depleted of manganese in the range of micrometres. Maximum manganese concentration is found in regions distant from these particles and in pearlitic regions. Simultaneously, ferritic grain boundaries in the vicinity of the graphite particles are enriched in phosphorus in the nanometer range. This interfacial segregation, reaching nearly 15 at.-%P, is most probably responsible for an embrittlement of these regions and the appearance of intercrystalline decohesion. An elastic-plastic finite element analysis of the ferritic/pearlitic microstructure demonstrates that a heterogeneous microstructure is locally subjected to heterogeneous stresses and strains, which are also expected to affect fracture mechanisms. |
| doi_str_mv | 10.1179/174328406X129959 |
| format | Article |
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The heterogeneity in chemical composition is revealed by a thorough study of the microstructure using scanning electron microscopy, Auger electron spectroscopy and colour etching. The ferritic phase surrounding the graphite globules is enriched by silicon and depleted of manganese in the range of micrometres. Maximum manganese concentration is found in regions distant from these particles and in pearlitic regions. Simultaneously, ferritic grain boundaries in the vicinity of the graphite particles are enriched in phosphorus in the nanometer range. This interfacial segregation, reaching nearly 15 at.-%P, is most probably responsible for an embrittlement of these regions and the appearance of intercrystalline decohesion. An elastic-plastic finite element analysis of the ferritic/pearlitic microstructure demonstrates that a heterogeneous microstructure is locally subjected to heterogeneous stresses and strains, which are also expected to affect fracture mechanisms.</description><identifier>ISSN: 0267-0836</identifier><identifier>EISSN: 1743-2847</identifier><identifier>DOI: 10.1179/174328406X129959</identifier><identifier>CODEN: MSCTEP</identifier><language>eng</language><publisher>London, England: Taylor & Francis</publisher><subject>Chemicals ; CONCENTRATION HETEROGENEITY ; DEFORMATION HETEROGENEITY ; Finite element analysis ; FINITE ELEMENT METHOD ; FRACTURE MICROMECHANISMS ; Fractures ; Materials science ; NODULAR CAST IRON ; Plastic deformation ; Scanning electron microscopy ; Silicon carbide ; Steel ; Wear resistance</subject><ispartof>Materials science and technology, 2006-12, Vol.22 (12), p.1415-1422</ispartof><rights>2006 Maney Publishing 2006</rights><rights>2006 Maney Publishing</rights><rights>Copyright Institute of Materials Dec 2006</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c422t-c142a3b00995aeced1b2d2b3e871c3ecd69175e793b54c3d75f7492f972d0def3</citedby><cites>FETCH-LOGICAL-c422t-c142a3b00995aeced1b2d2b3e871c3ecd69175e793b54c3d75f7492f972d0def3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://journals.sagepub.com/doi/pdf/10.1179/174328406X129959$$EPDF$$P50$$Gsage$$H</linktopdf><linktohtml>$$Uhttps://journals.sagepub.com/doi/10.1179/174328406X129959$$EHTML$$P50$$Gsage$$H</linktohtml><link.rule.ids>314,776,780,21798,27901,27902,43597,43598</link.rule.ids></links><search><creatorcontrib>Konečná, R.</creatorcontrib><creatorcontrib>Lejček, P.</creatorcontrib><creatorcontrib>Nicoletto, G.</creatorcontrib><creatorcontrib>Bartuška, P.</creatorcontrib><title>Role of composition heterogeneity on fracture micromechanisms of nodular cast iron</title><title>Materials science and technology</title><description>The aim of the present study is to explain the role of chemical composition and heterogeneity within the microstructure of nodular cast iron on the micromechanisms of fracture. The heterogeneity in chemical composition is revealed by a thorough study of the microstructure using scanning electron microscopy, Auger electron spectroscopy and colour etching. The ferritic phase surrounding the graphite globules is enriched by silicon and depleted of manganese in the range of micrometres. Maximum manganese concentration is found in regions distant from these particles and in pearlitic regions. Simultaneously, ferritic grain boundaries in the vicinity of the graphite particles are enriched in phosphorus in the nanometer range. This interfacial segregation, reaching nearly 15 at.-%P, is most probably responsible for an embrittlement of these regions and the appearance of intercrystalline decohesion. An elastic-plastic finite element analysis of the ferritic/pearlitic microstructure demonstrates that a heterogeneous microstructure is locally subjected to heterogeneous stresses and strains, which are also expected to affect fracture mechanisms.</description><subject>Chemicals</subject><subject>CONCENTRATION HETEROGENEITY</subject><subject>DEFORMATION HETEROGENEITY</subject><subject>Finite element analysis</subject><subject>FINITE ELEMENT METHOD</subject><subject>FRACTURE MICROMECHANISMS</subject><subject>Fractures</subject><subject>Materials science</subject><subject>NODULAR CAST IRON</subject><subject>Plastic deformation</subject><subject>Scanning electron microscopy</subject><subject>Silicon carbide</subject><subject>Steel</subject><subject>Wear resistance</subject><issn>0267-0836</issn><issn>1743-2847</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNqFkUtLxDAUhYMoOD72LosLd9W82jS4ksEXDAiDgruSprczGdpkTFpk_r0pFYQBdXXh8J3DvfcgdEHwNSFC3hDBGS04zt8JlTKTB2g2SmnUxCGaYZqLFBcsP0YnIWwwxrmUcoaWS9dC4ppEu27rgumNs8kaevBuBRZMv0ui0Hil-8FD0hntXQd6rawJXRiN1tVDq3yiVegT4509Q0eNagOcf89T9PZw_zp_Shcvj8_zu0WqOaV9qgmnilUYx20VaKhJRWtaMSgE0Qx0nUsiMhCSVRnXrBZZI7ikjRS0xjU07BRdTblb7z4GCH3ZmaChbZUFN4SScUlykmf_glQWhBecR_ByD9y4wdt4RElx_DImdEzDExQ_EYKHptx60ym_KwkuxyrK_SqiJZ0sQa3gJ_MP_nbijW2c79Sn821d9mrXOh-rsNrE6351fwHbV5xQ</recordid><startdate>20061201</startdate><enddate>20061201</enddate><creator>Konečná, R.</creator><creator>Lejček, P.</creator><creator>Nicoletto, G.</creator><creator>Bartuška, P.</creator><general>Taylor & Francis</general><general>SAGE Publications</general><general>Taylor & Francis Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7SR</scope><scope>7XB</scope><scope>88I</scope><scope>8AF</scope><scope>8BQ</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>F28</scope><scope>FR3</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>M2P</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>Q9U</scope><scope>S0X</scope></search><sort><creationdate>20061201</creationdate><title>Role of composition heterogeneity on fracture micromechanisms of nodular cast iron</title><author>Konečná, R. ; 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The heterogeneity in chemical composition is revealed by a thorough study of the microstructure using scanning electron microscopy, Auger electron spectroscopy and colour etching. The ferritic phase surrounding the graphite globules is enriched by silicon and depleted of manganese in the range of micrometres. Maximum manganese concentration is found in regions distant from these particles and in pearlitic regions. Simultaneously, ferritic grain boundaries in the vicinity of the graphite particles are enriched in phosphorus in the nanometer range. This interfacial segregation, reaching nearly 15 at.-%P, is most probably responsible for an embrittlement of these regions and the appearance of intercrystalline decohesion. An elastic-plastic finite element analysis of the ferritic/pearlitic microstructure demonstrates that a heterogeneous microstructure is locally subjected to heterogeneous stresses and strains, which are also expected to affect fracture mechanisms.</abstract><cop>London, England</cop><pub>Taylor & Francis</pub><doi>10.1179/174328406X129959</doi><tpages>8</tpages></addata></record> |
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| subjects | Chemicals CONCENTRATION HETEROGENEITY DEFORMATION HETEROGENEITY Finite element analysis FINITE ELEMENT METHOD FRACTURE MICROMECHANISMS Fractures Materials science NODULAR CAST IRON Plastic deformation Scanning electron microscopy Silicon carbide Steel Wear resistance |
| title | Role of composition heterogeneity on fracture micromechanisms of nodular cast iron |
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