In-situ SEM observation on fracture behavior of austempered silicon alloyed steel
Crack initiation, propagation and microfracture processes of austempered high silicon cast steel have been investigated by using an in-situ tensile stage installed inside a scanning electron microscope chamber. It is revealed that micro cracks always nucleate at the yielding near imperfections and t...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Foundry Journal Agency
2009-08-01
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| Series: | China Foundry |
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| Online Access: | http://www.foundryworld.com/uploadfile/200912130232601.pdf |
| _version_ | 1818556238588280832 |
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| author | Chen Xiang Vuorinen Esa Grahn Jonny |
| author_facet | Chen Xiang Vuorinen Esa Grahn Jonny |
| author_sort | Chen Xiang |
| collection | DOAJ |
| description | Crack initiation, propagation and microfracture processes of austempered high silicon cast steel have been investigated by using an in-situ tensile stage installed inside a scanning electron microscope chamber. It is revealed that micro cracks always nucleate at the yielding near imperfections and the boundary of matrix-inclusions due to the stress concentration. There are four types of crack propagations in the matrix: crack propagates along the boundary of two clusters of bainitic ferrite; crack propagates along the boundary of ferrite朼ustenite in bainitic ferrite laths; crack propagates into bainitic ferrite laths; crack nucleates and propagates in the high carbon brittle plate shape martensite which is transformed from some blocky retained austenite due to plastic deformation. Based on the observation and analysis of microfracture processes, a schematic diagram of the crack nucleation and propagation process of high silicon cast steel is proposed |
| first_indexed | 2024-12-13T23:44:46Z |
| format | Article |
| id | doaj.art-29e6af344bef4500875c11469ee0eff6 |
| institution | Directory Open Access Journal |
| issn | 1672-6421 |
| language | English |
| last_indexed | 2024-12-13T23:44:46Z |
| publishDate | 2009-08-01 |
| publisher | Foundry Journal Agency |
| record_format | Article |
| series | China Foundry |
| spelling | doaj.art-29e6af344bef4500875c11469ee0eff62022-12-21T23:27:02ZengFoundry Journal AgencyChina Foundry1672-64212009-08-0163185190In-situ SEM observation on fracture behavior of austempered silicon alloyed steelChen XiangVuorinen EsaGrahn JonnyCrack initiation, propagation and microfracture processes of austempered high silicon cast steel have been investigated by using an in-situ tensile stage installed inside a scanning electron microscope chamber. It is revealed that micro cracks always nucleate at the yielding near imperfections and the boundary of matrix-inclusions due to the stress concentration. There are four types of crack propagations in the matrix: crack propagates along the boundary of two clusters of bainitic ferrite; crack propagates along the boundary of ferrite朼ustenite in bainitic ferrite laths; crack propagates into bainitic ferrite laths; crack nucleates and propagates in the high carbon brittle plate shape martensite which is transformed from some blocky retained austenite due to plastic deformation. Based on the observation and analysis of microfracture processes, a schematic diagram of the crack nucleation and propagation process of high silicon cast steel is proposedhttp://www.foundryworld.com/uploadfile/200912130232601.pdfhigh silicon cast steelbainitic ferriteaustemperingin-situ SEM observation |
| spellingShingle | Chen Xiang Vuorinen Esa Grahn Jonny In-situ SEM observation on fracture behavior of austempered silicon alloyed steel China Foundry high silicon cast steel bainitic ferrite austempering in-situ SEM observation |
| title | In-situ SEM observation on fracture behavior of austempered silicon alloyed steel |
| title_full | In-situ SEM observation on fracture behavior of austempered silicon alloyed steel |
| title_fullStr | In-situ SEM observation on fracture behavior of austempered silicon alloyed steel |
| title_full_unstemmed | In-situ SEM observation on fracture behavior of austempered silicon alloyed steel |
| title_short | In-situ SEM observation on fracture behavior of austempered silicon alloyed steel |
| title_sort | in situ sem observation on fracture behavior of austempered silicon alloyed steel |
| topic | high silicon cast steel bainitic ferrite austempering in-situ SEM observation |
| url | http://www.foundryworld.com/uploadfile/200912130232601.pdf |
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