Analysis on typical rail damage of high speed railway

Yang Dawei; Deng Yong; Dong Xuejiao; Zhao Jizhong

doi:10.7513/j.issn.1004-7638.2022.04.028

Volume 43 Issue 4

Sep. 2022

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Yang Dawei, Deng Yong, Dong Xuejiao, Zhao Jizhong. Analysis on typical rail damage of high speed railway[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(4): 184-190. doi: 10.7513/j.issn.1004-7638.2022.04.028

Citation:

Yang Dawei, Deng Yong, Dong Xuejiao, Zhao Jizhong. Analysis on typical rail damage of high speed railway[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(4): 184-190. doi: 10.7513/j.issn.1004-7638.2022.04.028

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Analysis on typical rail damage of high speed railway

doi: 10.7513/j.issn.1004-7638.2022.04.028

1.
Pangang Group Research Institute Co., Ltd., State Key Laboratory for Comprehensive Utilization of Vanadium and Titanium Resources, Panzhihua 617000, Sichuan, China
2.
Sichuan Panyan Testing Technology Co., Ltd., Panzhihua 617000, Sichuan, China
3.
School of Mechanics and Aerospace Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

Received Date: 2021-05-18
Publish Date: 2022-09-14

Abstract

Abstract

Rail damage restricts the stable contact between wheel and rail and affects the driving safety. Regarding the damage of a railway rail in on-line service, the multi-directional inspections had been carried out by using Axio observer 5m metallographic microscope, Empyrean X-ray diffractometer, sigma 500 scanning electron microscope and Falcon 500 microhardness tester. Based on the finite element simulation technology, the instantaneous temperature field distribution of the rail contact part under the abnormal starting condition of the wheel was reproduced. The analysis results show that the rail damage is a typical scratch with a damage depth of more than 2 mm. With the increase of tread depth, the volume fraction of martensite gradually decreases and the volume fraction of retained austenite gradually increases, so that the corresponding microhardness value gradually decreases. The retained austenite is surrounded by martensite structure, which increases the resistance to the continuous propagation of microcracks and passivates the crack tip. Under the joint action of wheel rail surface shear stress, it provides a channel for microcrack propagation, induces microcrack transverse propagation, and finally leads to peeling failure in rail scratch area. The computer simulation results are agreement with the actual damage characteristics.
- rail,
- debonding failure,
- martensite,
- microcrack,
- finite element simulation

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References(10)

References

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