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Translated from Problemy Prochnosti, No. 1, pp. 131 – 140, January – February, 2015.
Based on the average fatigue life of LZ50 axle steel specimens without surface rolling, five maintenance times were determined. Accordingly, five groups of specimens were turned and rolled at above maintenance times and were fatigued using a replica technique. The results show that the crack growth rate is much lower than that before rolling at a given dominant short crack size. The effective short crack density of all specimens decreases significantly after maintenance. However, with the postponement of surface maintenance, the highest effective short crack density for the five studied groups of specimens increases continuously, while the average fatigue life decreases gradually. A maintenance time effect function is presented to refine a short crack growth model described previously. The refined model can include a significant effect of the maintenance time on short crack growth and predict its patterns at different maintenance times with exiting test results for LZ50 axle steel.
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Z. Y. Shen, Y. X. Zhao, B. Yang, and J. C. Peng, “Progresses on the fatigue reliability research of China railway,” Adv. Mater. Res., 44-46, 1–14 (2008). CrossRef
Y. X. Zhao, Q. Gao, B. Zhang, and K. J. Diao, “Key solid mechanics issues and research progresses for railway vehicle wheelset,” Chin. J. Solid Mech., 31, No. 6, 716–730 (2010).
S. Pearson, “Initiation of fatigue cracks in commercial aluminum alloys and the subsequent propagation of very short cracks,” Eng. Fract. Mech., 7, 235–247 (1975). CrossRef
Y. X. Zhao, B. Yang, and M. F. Feng, “Critical safety fatigue crack sizes for the RD2 type axle of Chinese railway freight car,” in: S. J. Wu, P. E. J. Flewitt, and Z. Zhang (Eds.), Proc. 9th Int. Conf. on Engineering Structural Integrity Assessment (Beijing, China, 2007), China Machine Press (2007), pp. 1194–1199.
Y. X. Zhao, B. Yang, M. F. Feng, et al., “Probabilistic critical fatigue safety state of the RD2 type axle of China railway freight car,” Adv. Mater. Res., 44-46, 751–758 (2008). CrossRef
M. W. Brown, “Interfaces between short, long and non-propagating cracks,” in: K. J. Miller and E. R. de los Rios (Eds.), The Behavior of Short Fatigue Cracks, Mechanical Engineering Publications, London (1986), pp. 423–439.
P. D. Hobson, M. W. Brown, and E. R. de los Rios, “Two phases of short crack growth in a medium carbon steel,” in: K. J. Miller and E. R. de los Rios (Eds.), The Behavior of Short Fatigue Cracks, Mechanical Engineering Publications, London (1986), pp. 441–459.
K. J. Miller, H. J. Mohamed, and E. R. de los Rios, “Barriers to short fatigue crack propagation at low stress amplitude in a banded ferrite-pearlite structure,” in: R. O. Ritchie and J. A. Lankford (Eds.), Small Fatigue Cracks, Lankford Publication of the Metallurgical Society, Inc., PA (1986), pp. 639–656.
A. Navarro and E. R. de los Rios, “A model for short fatigue crack propagation with an interpretation of the short-long crack transition,” Fatigue Fract. Eng. Mater. Struct., 10, 169–186 (1987). CrossRef
J. Polak and P. Liskutin, “Nucleation and short crack growth in fatigued polycrystalline copper,” Fatigue Fract. Eng. Mater. Struct., 13, 119–133 (1990). CrossRef
B. Yang and Y. X. Zhao, “Experimental research on dominant effective short fatigue crack behavior for railway LZ50 axle steel,” Int. J. Fatigue, 35, 71–78 (2012). CrossRef
Z. He and W. W. Yao, “Rotating bending fatigue property of LZ50 steel axle,” Mater. Mech. Eng., 36, 94–96 (2012).
B. Yang and Y. X. Zhao, “Influences of final processing methods on surface physical properties and fatigue life for railway LZ50 steel,” Adv. Mater. Res., 463-464, 85–89 (2012). CrossRef
M. H. Swain, “Monitoring small-crack growth by the replication method,” in: J. M. Larsen and J. E. Allison (Eds.), Small-Crack Test Methods, ASTM STP 1149, Philadelphia (1992), pp. 34–56.
B. Yang and Y. X. Zhao, “Influence of surface rolling time on short fatigue crack behavior of LZ50 axle steel,” in: Proc. 13th Int. Conf. on Fracture (Beijing, China, 2013), pp. 1774–1781.
Y. X. Zhao, Q. Gao, and J. N. Wang, “Interaction and evolution of short fatigue cracks,” Fatigue Fract. Eng. Mater. Struct., 22, 459–468 (1999). CrossRef
Y. X. Zhao, “Size evolution of the surface short fatigue cracks of 1Cr18Ni9Ti pipe-weld metal,” J. Mater. Sci. Technol., 19, 129–132 (2003).
B. Yang and Y. X. Zhao, “Surface rolling effect on effective short fatigue cracks density for railway LZ50 axle steel,” Adv. Mater. Res., 118-120, 75–79 (2010). CrossRef
- Short Fatigue Crack Growth at Different Maintenance Times for LZ50 Steel
B. Q. Ma
Y. X. Zhao
S. N. Xiao
- Springer US
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