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Materials 2016, 9(8), 641;

Healing of Fatigue Crack in 1045 Steel by Using Eddy Current Treatment

School of Materials Science and Engineering & National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin 150001, China
State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
Author to whom correspondence should be addressed.
Academic Editor: Yoshiharu Mutoh
Received: 24 June 2016 / Revised: 22 July 2016 / Accepted: 25 July 2016 / Published: 29 July 2016
(This article belongs to the Special Issue Fracture and Fatigue Mechanics of Materials)
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In order to investigate the methods to heal fatigue cracks in metals, tubular specimens of 1045 steel with axial and radial fatigue cracks were treated under the eddy current. The optical microscope was employed to examine the change of fatigue cracks of specimens before and after the eddy current treatment. The results show that the fatigue cracks along the axial direction of the specimen could be healed effectively in the fatigue crack initiation zone and the crack tip zone under the eddy current treatment, and the healing could occur within a very short time. The voltage breakdown and the transient thermal compressive stress caused by the detouring of eddy current around the fatigue crack were the main factors contributing to the healing in the fatigue crack initiation zone and the crack tip zone, respectively. Eddy current treatment may be a novel and effective method for crack healing. View Full-Text
Keywords: fatigue crack; healing; eddy current fatigue crack; healing; eddy current

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Yang, C.; Xu, W.; Guo, B.; Shan, D.; Zhang, J. Healing of Fatigue Crack in 1045 Steel by Using Eddy Current Treatment. Materials 2016, 9, 641.

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