Reaserch on Measurement of Residual Stresses in Flash-Butt-Weld Rails Using X-Ray Diffraction

Abstract:

The residual stress,which is unavoidable in the process of flash-butt-weld rails,plays important roles in the service life of the railway rails.However,knowledge of magnitude,direction,and sign of the residual stress is useful for maintenance and failure prevention.In this paper,we measured the residual stresses in the flash-butt weld of the U71Mn railway rail,using X-ray diffraction method.Besides,we investigated the influence of grinding on residual surface stress.This investigation showed that residual stress generated by grinding could be removed by electro-polishing,we also found that there was longitudinal compressive stress in the foot and head region,while the web region presented tensile stress,and in the transverse position,all of the three regions existed both compressive and tensile stress.

• Periodical: Advanced Materials Research (Volumes 291-294)
• Pages: 934-940
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.291-294.934
• Online since: July 2011
• Authors: Shao Hua Yan, Hui Chen, Guo Qing Gou, Da Li, Yan Liu, Zhong Yin Zhu
• Keywords: Electro-Polishing, Flash Butt Weld, Railway Rails, Residual Stress, X-Ray Diffraction (XRD)

References

[1] A Skyttebol , B.L. Josefson, J.W. Ringsberg,Fatigue crack growth in a welded rail under the influence of residual stresses[J] ,Engineering Fracture Mechanics 72 (2005) 271–285

DOI: 10.1016/j.engfracmech.2004.04.009

[2] Fukada Y, Yamamoto R, Harasawa H, Nakonowatari H. Experience in maintaining railtrack in Japan[J]. Weld World 2003;47:123–137

[3] Champoux RL, Underwood JH, Kapp JA, editors. Analytical and experimental methods for residual stress effects in fatigue. ASTM STP 1004, (1988)

DOI: 10.1520/stp1004-eb

[4] G.A. Webster, A.N. Ezeilo.Residual stress distributions and their influence on fatigue lifetimes [J].International Journal of Fatigue 23 (2001) S375–S383

DOI: 10.1016/s0142-1123(01)00133-5

[5] David Tawfik，Oliver Kirstein，Peter John Mutton，Wing Kong Chiu，Verification of residual stresses in flash-butt-weld rails usingneutron diffraction[J]，Physica B 385–386 (2006) 894–896

DOI: 10.1016/j.physb.2006.05.242

[6] D. Tawfik, P.J. Mutton, W.K. Chiu, Proceedings of the Eighth International Conference on Heavy Haul, 2005, p.653–658

[7] GB7704-2008, Non-destructive testing-Practice for residual stress measurement by X-Ray [S]

[8] Kaczmarek J. Principles of machining by cutting, abrasion and erosion. Stevenage: Peter Peregrinus Limited; 1976. Voellnagel A,Lepa E, Translators

[9] J.J. Williams, X. Deng 1, N. Chawla. Effect of residual surface stress on the fatigue behavior of a low-alloy powder metallurgy steel[J], International Journal of Fatigue 29 (2007) 1978–(1984)

DOI: 10.1016/j.ijfatigue.2007.01.008

[10] Yuuji Shimatani,Kazuaki Shiozawa,Takehiro Nakada,Takashi Yoshimoto, Liantao Lu , The effect of the residual stresses generated by surface finishing methods on the very high cycle fatigue behavior of matrix HSS ,International Journal of Fatigue 33 (2011) 122–131

DOI: 10.1016/j.ijfatigue.2010.07.009

[11] Ghanem F, Braham C, Fitzpatrick ME, Sidhom H. Effect of near surface residual stress and microstructure modification from machining on the fatigue endurance of a tool steel. J Mater Eng Perform 2002;11(6):631–639；

DOI: 10.1361/105994902770343629

[12] Matsumoto Y, Magda D, Hoeppner DW, Kim TY. Effect of machining processes on the fatigue strength of hardened AISI 430 TransASME1991;113(May):154–159.

DOI: 10.1115/1.2899672