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On-line Access: 2025-11-20

Received: 2025-05-15

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Journal of Zhejiang University SCIENCE A

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Effect of laminar plasma quenching technology on the anti-wear and anti-fatigue properties of two types of U75V rail welded joints


Author(s):  Jingmang XU1, 2, Hui ZHU1, 2, Wenfeng GAO1, 2, Taoshuo BAI1, 2, Jian YANG1, 2, Kai WANG3, Yao QIAN1, 2, Ping WANG1, 2

Affiliation(s):  1MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031, China 2School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China 3College of Design and Engineering, National University of Singapore, Singapore 117356, Singapore

Corresponding email(s):  Jingmang XU, mang080887@163.com Kai WANG, wangkai@nus.edu.sg

Key Words:  Laminar plasma quenching technology; Rail welded joints; Rolling contact fatigue; Wear


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Jingmang XU1,2, Hui ZHU1,2, Wenfeng GAO1,2, Taoshuo BAI1,2, Jian YANG1,2, Kai WANG3, Yao QIAN1,2, Ping WANG1,2. Effect of laminar plasma quenching technology on the anti-wear and anti-fatigue properties of two types of U75V rail welded joints[J]. Journal of Zhejiang University Science A,in press.Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/jzus.A2500194

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author="Jingmang XU1,2, Hui ZHU1,2, Wenfeng GAO1,2, Taoshuo BAI1,2, Jian YANG1,2, Kai WANG3, Yao QIAN1,2, Ping WANG1,2",
journal="Journal of Zhejiang University Science A",
year="in press",
publisher="Zhejiang University Press & Springer",
doi="https://doi.org/10.1631/jzus.A2500194"
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Abstract: 
The performance of rail welded joints significantly affects the safety of railways. In this study we compare the fatigue damage of U75V thermite welded joints (TWJs) and flash-butt welded joints (FWJs), and subsequently explore the effect of laminar plasma quenching (LPQ) on the anti-wear and anti-fatigue properties of these two types of joints. The results indicate that LPQ reduced the wear of the FWJs by 78-85%. Crack propagation in the quenched thermite welded joints is observed to be controlled by the subsurface defect-initiated cracking (SDIC) mechanism, whereas the crack propagation in quenched flash-butt welded joints involves two mechanisms: surface-originated fatigue cracks (SOFC), as well as SDIC. Elemental fluctuations and changes in dislocation density account for the differences in wear mechanisms and fatigue damage between these two forms of quenched welded joints.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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