Paper Title:
Effect of Pre-Strain on Fatigue Properties of NHH Rail
  Abstract

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.

  Info
Periodical
Key Engineering Materials (Volumes 261-263)
Edited by
Kikuo Kishimoto, Masanori Kikuchi, Tetsuo Shoji and Masumi Saka
Pages
1239-1244
DOI
10.4028/www.scientific.net/KEM.261-263.1239
Citation
W. X. Sun, S. Nishida, N. Hattori, X.L. Yue, "Effect of Pre-Strain on Fatigue Properties of NHH Rail", Key Engineering Materials, Vols. 261-263, pp. 1239-1244, 2004
Online since
April 2004
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Price
$32.00
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