Pulsing-induced healing of a surface crack of a nickel-based alloy

Liwei Wang; Mingming Quan; Zhen Tan; Ming Liu; Dianlong Wang; Xiao Yang; Ying Liu; Yaning Mao; Zhimin Liang; Fuqian Yang

Journal of Materials Research and Technology (Jul 2024)

Pulsing-induced healing of a surface crack of a nickel-based alloy

Liwei Wang,
Mingming Quan,
Zhen Tan,
Ming Liu,
Dianlong Wang,
Xiao Yang,
Ying Liu,
Yaning Mao,
Zhimin Liang,
Fuqian Yang

Affiliations

Liwei Wang: School of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China; Hebei Key Laboratory of Material Near-Net Forming Technology, Shijiazhuang, 050018, China
Mingming Quan: School of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China
Zhen Tan: School of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China
Ming Liu: School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, 350108, China
Dianlong Wang: School of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China; Hebei Key Laboratory of Material Near-Net Forming Technology, Shijiazhuang, 050018, China
Xiao Yang: School of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China; Hebei Key Laboratory of Material Near-Net Forming Technology, Shijiazhuang, 050018, China
Ying Liu: School of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China; Hebei Key Laboratory of Material Near-Net Forming Technology, Shijiazhuang, 050018, China
Yaning Mao: HBIS Group Materials Institute, HBIS Group, Shijiazhuang, Hebei, 050023, China
Zhimin Liang: School of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China; Hebei Key Laboratory of Material Near-Net Forming Technology, Shijiazhuang, 050018, China; Corresponding author. School of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China.
Fuqian Yang: Materials Program, Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY, 40506, USA; Corresponding author.

Journal volume & issue: Vol. 31
pp. 733 – 738

Abstract

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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.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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