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Enhanced Service Life Of Rail Material

Author: Seky Chang, Young Sik Pyun, and Yasutoshi Tominaga   |   Document Download   |   Product code: ZCP2014MSTP0019

File size: 124 KB

Classified as: Fatigue Friction and Wear ...more

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Rail is under severe condition since trains tend to be toward high speed and heavy axle load with increasing demand of railway services. Wear and rolling contact fatigue are ones of the typical damages which occur on the rail. The surface of rail material was treated with ultrasonic nanocrystal surface modification (UNSM) which is a new method to cause severe plastic deformation in the surface layer. Microstructural changes after UNSM treatment resulted in increase of hardness and compressive residual stress in the surface layer of specimen. Wear resistance was improved after UNSM. The normal rail specimen after UNSM showed same or better wear resistance compared to heat treated one. The effect of UNSM on the enhanced service life of rail materials was evaluated.

  • From:

    Materials Science & Technology 2014 (MS&T)

  • Publisher: TMS
  • Published: 2014
  • Pages: 5