A Fretting Damage Analysis of Railway Axle

Abstract:

A railway axle operated over 6×105 km has been detected by varied micro-examination methods in detail. The examination of Leeb hardness tester results showed that the hardness of the press-fit seats presented higher hardness than that of other sites. According to the micro morphological analyses by optical microscope (OM), scanning electron microscope (SEM), energy dispersive X-ray spectrum (EDX), and profilometer on the surface at different press-fit seats, the most severe damage band was occurred at the inner edge of wheel seat near the gear seat. The transmission electron microscope (TEM) results indicated that the dislocation density of subsurface, beneath the axle surface about 20 μm, was much higher with a great deal of dislocation tangles, pile-ups and cellular structure formation. However, when the examination depth increased to 100 μm, no cellular structure can be founded, the dislocation density was very low, so the damage depth was less than 100 μm.

• Periodical: Advanced Materials Research (Volumes 652-654)
• Pages: 1393-1398
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.652-654.1393
• Online since: January 2013
• Authors: Yue Jun Zhang, Jin Fang Peng, Zhen Bing Cai, Min Hao Zhu
• Keywords: Damage Mechanism, Failure Analysis, Fretting Damage, Railway Axle

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