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Open AccessArticle

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

1
School of Materials Science and Engineering & National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin 150001, China
2
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
Materials 2016, 9(8), 641; https://doi.org/10.3390/ma9080641
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)
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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MDPI and ACS Style

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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