Effect of Pre-Strain on Fatigue Properties of NHH Rail


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In the present study, fatigue tests have been performed to study the effect of pre-strain on fatigue properties of NHH (New Head-Hardened) rail. The objectives of this study were: (1) to observe the microscopic behavior of specimens during pre-strain process, (2) to research the influence of pre-strain on fatigue strength of NHH rail and (3) to investigate initiation and propagation behavior of the fatigue crack. The results showed that plastic pre-strain decreased the fatigue strength of NHH rail; fatigue limits had no obvious variation among the different pre-strain ratios. Fatigue cracks initiated in the microscopic cracking or slip lines that were originated in the pre-strain process and propagated from these sites in the later fatigue test.



Key Engineering Materials (Volumes 261-263)

Edited by:

Kikuo Kishimoto, Masanori Kikuchi, Tetsuo Shoji and Masumi Saka




W. X. Sun et al., "Effect of Pre-Strain on Fatigue Properties of NHH Rail", Key Engineering Materials, Vols. 261-263, pp. 1239-1244, 2004

Online since:

April 2004




[1] Kato: Rail, Railway Equipment Association of Japan (1973).

[2] K. Sugino, H. Masumoto, S. Nishida, C. Urashima, H. Kageyama, M. Hattori. J. study of making steel. 303 (1980) p.32.

[3] C. Urashima and S. Nishida, J. Mat. Sci. Res. Int., 43 (1993) pp.515-521.

[4] C. Urashima and S. Nishida, Pro. Int. Conf. Fatigue 99. 1999; pp.319-324.

[5] C. Urashima and S. Nishida, J. Mat. Sci. Res. Int., 38 (1983) pp.69-74.

[6] DF. Cannon and H. Pradier Wear, 191 (1996) pp.1-13.

[7] Ringsberg JW, Lindback T. � Int. J. Fatigue 25 (2003) pp.547-558.

[8] WR. Tyfour, JH. Beynon, A, Kapoor . Wear 197(1996) pp.255-265.

[9] Schleinzer G, Fisher F D. Int. J. Mech. Sci. 43(2001) pp.2281-2295.

[10] Takahasi, M. Nagumo and Y. Asano, J. The Japan institute of metals, 42(1978) p.708.

[11] D. Miao, S. Nishida and N. Hattori, Int. Conf. Fatigue 99, China, Beijing (1999) p.619 Cyclic ratio N/Nf Fig. 11. Relationship between the main crack length and cyclic ratio.