Experimental research on electromagnetic heating effects to stop crack propagation in metal components

Xiangzhong Bai; Yuming Fu; Lijuan Zheng; Diankui Gao

doi:10.1117/12.468837

29 May 2002 Experimental research on electromagnetic heating effects to stop crack propagation in metal components

Xiangzhong Bai, Yuming Fu, Lijuan Zheng, Diankui Gao

Proceedings Volume 4537, Third International Conference on Experimental Mechanics; (2002) https://doi.org/10.1117/12.468837
Event: Third International Conference on Experimental Mechanics, 2002, Beijing, China

Abstract

Heating by an electromagnetic field is an effective method for stopping internal crack propagation in metal components, thus extending their service life by improving safety and reliability. Experimental surveys show that a small spherical crater can be formed near the crack tip using a concentrated current which melts metal at the desired point. Experiments also show that the sharp point around the crack tip is rounded, which decreases the stress concentration and forms a compressive stress area. These structure around the crack tip is refined obviously. At the same time, a white-bright layer is formed around the crack tip under the influence of a precipitous temperature gradient. Thermal compression stresses and phase transformation stresses, together with the influence of a super-fine microstructure, promote the ability of metals to withstand intense wear. From the experiments we also find many factors have an effect on the efficiency of crack arresting.

Citation Download Citation

Xiangzhong Bai, Yuming Fu, Lijuan Zheng, and Diankui Gao "Experimental research on electromagnetic heating effects to stop crack propagation in metal components", Proc. SPIE 4537, Third International Conference on Experimental Mechanics, (29 May 2002); https://doi.org/10.1117/12.468837

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