Analysis of crack healing in hot rolled deformed piece



Publication Details

Liu, X. & Yu, H. (2009). Analysis of crack healing in hot rolled deformed piece. Journal of Iron and Steel Research International, 21 (6), 36-39.


The crack healing process during hot rolling has been investigated. According to the experimental results, the crack healing process goes through four stages: crack surface contact, locally healing discontinuously, healing zone expanding, and global healing. On the basis of above results, the mechanism of crack healing is established. A new concept of crack contact depth is proposed. When the crack contact depth is less than a critical value, the continuity of crack is broken by the action of atoms near crack surfaces which might be caused by the movement of dislocation during deformation, and a local zone heals, then the healing zone expands.

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