Microstructure vs. Near-threshold Fatigue Crack Growth Behavior of an Heat-treated Ductile Iron
<p>Perferritic isothermal ductile iron (IDI®) is an intermediate grade between the low-strength grades of austempered ductile iron (ADI) and pearlitic ductile iron (DI) recently developed by Zanardi Fonderie Italy. IDI is produced by heat-treating an unalloyed nodular cast iron. The specific m...
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| Format: | Article |
| Language: | English |
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Kaunas University of Technology
2012-03-01
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| Series: | Medžiagotyra |
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| Online Access: | http://matsc.ktu.lt/index.php/MatSc/article/view/1336 |
| _version_ | 1819261443254517760 |
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| author | Radomila KONEČNÁ Lukáš BUBENKO Gianni NICOLETTO |
| author_facet | Radomila KONEČNÁ Lukáš BUBENKO Gianni NICOLETTO |
| author_sort | Radomila KONEČNÁ |
| collection | DOAJ |
| description | <p>Perferritic isothermal ductile iron (IDI®) is an intermediate grade between the low-strength grades of austempered ductile iron (ADI) and pearlitic ductile iron (DI) recently developed by Zanardi Fonderie Italy. IDI is produced by heat-treating an unalloyed nodular cast iron. The specific matrix microstructure is called “Perferritic” and consists predominantly of ferrite and pearlite. Compared to the pearlitic grades of nodular ductile iron, IDI combines similar strength with higher toughness as a result of the isothermal heat treatment.</p> In this contribution the fatigue crack growth resistance and <em>K<sub>ath</sub></em> of IDI are investigated and correlated to mechanical properties and microstructural features. The threshold <em>K<sub>a</sub></em> was determined using the load shedding technique as per ASTM Standard E-647 using CT specimens extracted from a cast block. Tensile specimens were extracted from the broken CT halves and used to determine the static mechanical properties. A metallographic investigation was carried out to correlate structural features and mechanical properties.<p>DOI: <a href="http://dx.doi.org/10.5755/j01.ms.18.1.1336">http://dx.doi.org/10.5755/j01.ms.18.1.1336</a></p> |
| first_indexed | 2024-12-23T19:41:53Z |
| format | Article |
| id | doaj.art-4b3f4ce252a543419180fcd700c8d5a2 |
| institution | Directory Open Access Journal |
| issn | 1392-1320 2029-7289 |
| language | English |
| last_indexed | 2024-12-23T19:41:53Z |
| publishDate | 2012-03-01 |
| publisher | Kaunas University of Technology |
| record_format | Article |
| series | Medžiagotyra |
| spelling | doaj.art-4b3f4ce252a543419180fcd700c8d5a22022-12-21T17:33:39ZengKaunas University of TechnologyMedžiagotyra1392-13202029-72892012-03-01181232710.5755/j01.ms.18.1.1336945Microstructure vs. Near-threshold Fatigue Crack Growth Behavior of an Heat-treated Ductile IronRadomila KONEČNÁ0Lukáš BUBENKO1Gianni NICOLETTO2University of ŽilinaUniversity of ŽilinaUniversity of Parma<p>Perferritic isothermal ductile iron (IDI®) is an intermediate grade between the low-strength grades of austempered ductile iron (ADI) and pearlitic ductile iron (DI) recently developed by Zanardi Fonderie Italy. IDI is produced by heat-treating an unalloyed nodular cast iron. The specific matrix microstructure is called “Perferritic” and consists predominantly of ferrite and pearlite. Compared to the pearlitic grades of nodular ductile iron, IDI combines similar strength with higher toughness as a result of the isothermal heat treatment.</p> In this contribution the fatigue crack growth resistance and <em>K<sub>ath</sub></em> of IDI are investigated and correlated to mechanical properties and microstructural features. The threshold <em>K<sub>a</sub></em> was determined using the load shedding technique as per ASTM Standard E-647 using CT specimens extracted from a cast block. Tensile specimens were extracted from the broken CT halves and used to determine the static mechanical properties. A metallographic investigation was carried out to correlate structural features and mechanical properties.<p>DOI: <a href="http://dx.doi.org/10.5755/j01.ms.18.1.1336">http://dx.doi.org/10.5755/j01.ms.18.1.1336</a></p>http://matsc.ktu.lt/index.php/MatSc/article/view/1336perferritic IDIfatigue crack propagationthreshold stress intensitytensile testmicrostructure |
| spellingShingle | Radomila KONEČNÁ Lukáš BUBENKO Gianni NICOLETTO Microstructure vs. Near-threshold Fatigue Crack Growth Behavior of an Heat-treated Ductile Iron Medžiagotyra perferritic IDI fatigue crack propagation threshold stress intensity tensile test microstructure |
| title | Microstructure vs. Near-threshold Fatigue Crack Growth Behavior of an Heat-treated Ductile Iron |
| title_full | Microstructure vs. Near-threshold Fatigue Crack Growth Behavior of an Heat-treated Ductile Iron |
| title_fullStr | Microstructure vs. Near-threshold Fatigue Crack Growth Behavior of an Heat-treated Ductile Iron |
| title_full_unstemmed | Microstructure vs. Near-threshold Fatigue Crack Growth Behavior of an Heat-treated Ductile Iron |
| title_short | Microstructure vs. Near-threshold Fatigue Crack Growth Behavior of an Heat-treated Ductile Iron |
| title_sort | microstructure vs near threshold fatigue crack growth behavior of an heat treated ductile iron |
| topic | perferritic IDI fatigue crack propagation threshold stress intensity tensile test microstructure |
| url | http://matsc.ktu.lt/index.php/MatSc/article/view/1336 |
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