Abstract
In this work, we demonstrate the feasibility of applying electric pulses to heal surface cracks on nickel-based alloy GH4169 under compressive load. There exists an incubation time for the onset of the healing of a crack, which is associated with local temperature at the crack tip. The crack size decreases with increasing the pulsing time at a constant healing rate prior to complete healing of the crack. Increasing compressive load accelerates the healing process. The electric pulsing leads to the formation of an influential zone surrounding the crack with the finest grain sizes in the healed crack and the coarsest grain sizes away from the influential zone. The indentation hardness increases with the increase the distance to the crack tip of the healed crack. A model of viscous flow in the crack channel is proposed for the crack healing. The resultant force on the crack faces due to the crack healing increases with the increase of the healing time and the decrease of the crack width.
Document Type
Article
Publication Date
7-2024
Digital Object Identifier (DOI)
https://doi.org/10.1016/j.jmrt.2024.06.132
Funding Information
LW and ZL are grateful for the supports from National Natural Science Foundation of China (Grant No. 51875168/52101015) and Natural Science Foundation of Hebei Province (Grant No. E2022208070/ E2024208049).
Repository Citation
Wang, Liwei; Quan, Mingming; Tan, Zhen; Liu, Ming; Wang, Dianlong; Yang, Xiao; Liu, Ying; Mao, Yaning; Liang, Zhimin; and Yang, Fuqian, "Pulsing-induced healing of a surface crack of a nickel-based alloy" (2024). Chemical and Materials Engineering Faculty Publications. 109.
https://uknowledge.uky.edu/cme_facpub/109
Included in
Biomaterials Commons, Ceramic Materials Commons, Chemical Engineering Commons, Metallurgy Commons
Notes/Citation Information
2238-7854/© 2024 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).