| 石墨形态和基体组织对铸铁断裂过程的影响 |
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| 引用本文： | 蒋建清. 石墨形态和基体组织对铸铁断裂过程的影响[J]. 金属学报, 1994, 30(8): 374-379 |
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| 作者姓名： | 蒋建清 |
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| 作者单位： | 东南大学 |
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| 摘 要： | 研究了石墨片混乱度Ｓ＝０的Ｆｅ－Ｃ合金和球墨铸铁在不同受力状态下的裂纹扩展现象，以及基体组织对断裂形貌的影响，试验发现：当裂纹遇到与其平行的片状石墨时，裂纹将在石墨内部以（０００１）面之间的解理而扩展；当裂纹遇到与其垂直的片状石墨时，裂纹将沿石墨／基体界面处扩展，也即界面的脱粘；当裂纹遇到球状石墨时，裂纹主要的二次石墨中前进，裂纹在铁素体－下贝氏体中以在铁素体中的扩展为主。
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| 关 键 词： | 片状石墨 球状石墨 裂纹扩展 铸铁 |
| 收稿时间： | 1994-08-18 |
| 修稿时间： | 1994-08-18 |
EFFECTS OF GRAPHITE MORPHOLOGY AND MATRICES ON FRACTURE BEHAVIOUR OF CAST IRONS |
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| JIANG Jianqing. EFFECTS OF GRAPHITE MORPHOLOGY AND MATRICES ON FRACTURE BEHAVIOUR OF CAST IRONS[J]. Acta Metallurgica Sinica, 1994, 30(8): 374-379 |
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| Authors: | JIANG Jianqing |
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| Affiliation: | JIANG Jianqing(Southeast University,Nanjing) |
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| Abstract: | The fracture behaviour of cast irons with graphite irregularity S=0 and spheroidal graphite iron under three different stress modes was investigated.When the crack was parallel or vertical to the graphite flakes,it would be developed along inside the graphite flakes,i, e the cleavage of(0001) plane of graphite flakes,or propagated along the matrix/graphite interface,i, e decohension between graphite flake and matrix respectively.In the case of spheroidal graphite cast iron with ferrite-bainite matrix,the crack would propagate mainly in ferrite and secondary graphite. |
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| Keywords: | Fe-C alloy flake graphite spheroidal graphite crack propagation cast iron |
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