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- W595746080 abstract "This paper mainly investigates the fracture problem of U71Mn rail flash-butt welding joint. Fracture surface morphology, microstructure and micro hardness are analyzed by using the scanning electron microscopy (SEM/EDS), the optical microscope (OM) and the micro Vickers hardness tester (Vickers-tester). The analysis results show that the welding joint is fatigue fracture, and the fracture surface morphology is the cleavage fracture characteristics. The metallographic morphology, inclusions and micro-hardness near the fracture surface are all in the normal levels. On the other side, the free solidification microstructure which extended from the outside to inside in the joint of the left side of the rail web and the rail head is the crack source of the rail welding joint fatigue fracture. Under the action of bending stress, the crack firstly generates in this area, and gradually extended to the rail web, to final fracture." @default.
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- W595746080 date "2015-10-01" @default.
- W595746080 modified "2023-10-06" @default.
- W595746080 title "Fracture analysis of U71Mn rail flash-butt welding joint" @default.
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- W595746080 doi "https://doi.org/10.1016/j.csefa.2015.05.001" @default.
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