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| OBSERVATION ON FATIGUE CRACK PROPAGATION OF PEARLITIC STRUCTURE |
| HU Zhizhong; ZHANG Pingsheng (Xi'an Jiaotong University) |
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Cite this article:
HU Zhizhong; ZHANG Pingsheng (Xi'an Jiaotong University). OBSERVATION ON FATIGUE CRACK PROPAGATION OF PEARLITIC STRUCTURE. Acta Metall Sin, 1983, 19(2): 66-155.
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Abstract Observations were demonstrated of 3 different types of the fatigue crack propagation of pearlitic structure: type A——the crack intersects the multiple ferrites and cementites simultaneously; type B——the crack cuts the ferrite and cementite one after another and type C——the crack propagates only through ferrite plate or along interface of ferrite and cementite. The fractographic examination indicated that the 3 fracture types in the process of fatigue crack propagation appear as different feature and proportion. In the slow stage of the fatigue crack propagation, it is the type A with partly type C or B; in the stable stage, mainly type A and B as well as marked fatigue striation; while in fast speed stage, the cleavage or dimple with partly striation predominantly.
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Received: 18 February 1983
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