Abstract
Steel splice plates are used in power transmission line towers. During service, some of these plates may fail due the loading stress as well as stress generated due to inclement weather condition. One such failed splice plate, cracked in the heel region of the plate has been studied in detail to find out genesis of such failure. Metallographic study of the failed plate material near the crack and away from the crack indicated presence of white hard martensite layer near the crack. Evaluation of mechanical properties of the plate material carried out at heel and edge regions had also supported the above findings. There was enhancement of hardness, yield strength, tensile strength of the plate near heel which had indicated localized hardening of the plate in this region due to presence of martensite. A substantial deterioration of the Charpy impact toughness of the material at the heel region could also be observed particularly at subzero testing temperatures due to the same reason. The material inadequacies and operational stresses must have caused the initiation and propagation of the cracks in the heel region of the plate leading to its premature failure.
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References
B. Xu, H.Y. Li, Mechanical analysis on the splicing form of cross-section multiple angle steel for transmission line. Adv. Mater. Res. 625, 30–36 (2012)
D.A. Ryder, General Practice in Failure Analysis, vol. 11, Failure Analysis and Prevention (American Society for Metals, ASM Handbook, 1986), pp. 15–46
F.R. Hutchings, P.M. Unterweiser, Service Related Failures, in Failure analysis—The British Engine Technical Reports (American Society for Metals, Materials Park, 1981), pp. 307–386
R.D. Barer, B.F. Peters, Wire Ropes, Why Metals Fail (Corden & Breach Science, New York, NY, 1982), pp. 218–223
ASM, in Wear Resistance of Steels, ASM Speciality Handbook: Carbon and Alloy Steels, ed. by J.R. Davis (ASM International, Materials Park, 1996), pp. 170–200
F.L. Jamieson, in Failure of Lifting Equipment, Failure Analysis and Prevention, ed. by K. Mills, J.R. Davis, J.D. Destefani, D.A. Dietrich, G.M. Crankovic, H.J. Frissell. Metals Handbook, 9th edn., vol 11 (American Society for Metals, Metals Park, 1986), pp. 514–521
S.K. Dhua, Amitava Ray, S. Jha, Metallurgical Investigation of Locked Coil Wire Rope samples Fractured During Service, Steel India 23(2), 40–42 (2000)
A. Ray, S.K. Dhua, K.B. Mishra, S. Jha, Microstructural manifestation of fractured Z-profile steel wires on the outer layer of a failed locked coil wire rope. Pract. Fail. Anal. 3(4), 33–37 (2003)
S.K. Dhua, C.D. Singh, A. Ray, Metallurgical investigation into the causes of premature failure of high-carbon steel wire rods during hot rolling. J. Fail. Anal. Prev. 5(4), 67–73 (2005)
C.O. Smith, Failure Analysis, The Science of Engineering Materials (Prentice Hall Inc., Englewood Cliffs, 1979), pp. 513–533
R. Kiessling, N. Lange, The Origin of Non-metallic Inclusions, vol. 3, 2nd edn., Non-Metallic Inclusions (The Metals Society, London, 1978), pp. 1–50
G.A. Sharp, in Steel Wire for Ropes. Steel Wire Handbook, ed. by A.B. Dove, vol 3 (The Wire Association Inc., Branford, 1972), pp. 77–94
S. Zhang, J. Li, H. Lv, in Tool Wear and Formation Mechanism of White Layer When Hard Milling H13 Steel under Different Cooling/Lubrication Conditions, Advances in Mechanical Engineering (2014), pp. 1–8
B.J. Griffiths, Mechanism of white layer generation with reference to machining and deformation processes. J. Tribol. 109(3), 525–530 (1987)
G. Krauss, in Microstructure, Processing and Properties of Steel, Properties and Selection: Iron, Steel and High Performance Alloys. Metals Handbook, 10th edn., vol 1 (American Society for Metals, Materials Park, 1990), pp. 126–139
Acknowledgments
The authors express their gratitude for the support and encouragement received from the management of the Research and Development Centre for Iron and Steel (RDCIS), Steel Authority of India Limited, Ranchi, India for carrying out the job. Thanks are expressed to the personnel of metallography and mechanical testing laboratories of RDCIS, SAIL, Ranchi for conducting the testing jobs in short time. The authors also acknowledge the contributions of Dr. Niladri Sen and Mr. S. Srikant for useful discussions during the course of the investigation and that of Mr. B. Khalko for their assistance in preparation of the manuscript.
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Dhua, S.K., Patra, B.B., Sarkar, P.P. et al. Metallurgical Investigation of a Cracked Splice Plate Used in a Power Transmission Line Tower. J Fail. Anal. and Preven. 14, 754–762 (2014). https://doi.org/10.1007/s11668-014-9890-7
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DOI: https://doi.org/10.1007/s11668-014-9890-7