To develop rails with higher hardness and thus better durability and longer life, alternative microstructures have been suggested, since conventional pearlitic rail steels have reached their hardness limit. Such a newly developed material has a fine bainite microstructure (coded J6 bainitic steel) and showed higher initial hardness but poorer on-site wear performance, compared to conventional pearlitic steels. This was explained by the fact that pearlitic steels show significant work hardening under severe stress conditions, even though their initial hardness was lower. In this work, the wear behavior of pearlitic and J6 bainitic rail steels was investigated at the micro/nano scale, using the nanoscratch technique. It was found that pearlitic steel shows better wear performance at the micro scale as well, in agreement with large scale rail field tests.
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World Tribology Congress III
September 12–16, 2005
Washington, D.C., USA
Conference Sponsors:
- Tribology Division
ISBN:
0-7918-4202-9
PROCEEDINGS PAPER
Micro/Nano Scale Wear Behavior of Pearlitic and Bainitic Rail Steels
Ki Myung Lee,
Ki Myung Lee
University of Illinois at Urbana-Champaign, Urbana, IL
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Andreas A. Polycarpou
Andreas A. Polycarpou
University of Illinois at Urbana-Champaign, Urbana, IL
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Ki Myung Lee
University of Illinois at Urbana-Champaign, Urbana, IL
Andreas A. Polycarpou
University of Illinois at Urbana-Champaign, Urbana, IL
Paper No:
WTC2005-63735, pp. 795-796; 2 pages
Published Online:
November 17, 2008
Citation
Lee, KM, & Polycarpou, AA. "Micro/Nano Scale Wear Behavior of Pearlitic and Bainitic Rail Steels." Proceedings of the World Tribology Congress III. World Tribology Congress III, Volume 2. Washington, D.C., USA. September 12–16, 2005. pp. 795-796. ASME. https://doi.org/10.1115/WTC2005-63735
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