Performance Evaluation and Durability Analysis of 52100 Bearings under Varying Heat Treatment Conditions in Aerospace Applications


DOI:
https://doi.org/10.5281/zenodo.15038386Keywords:
Bearings, Heat Treatment, Vibration Analysis, Aerospace Applications, DurabilityAbstract
This study investigates the performance and longevity of two types of bearings—the motor
bearing and the input module bearing—fabricated from 52100 (100 Cr6) bearing steel, following a 500
hour flight operation. Case evaluations, including hardness testing and vibration analysis, were conducted
after the bearings underwent various heat treatments, specifically at temperatures of 600°C and 700°C. The
findings revealed that the input module bearing heat-treated at 600°C experienced increased vibration
levels, which, while initially within acceptable limits, resulted in the bearing becoming inactive after 900
hours due to the cumulative effects of the operational environment. In contrast, the bearing treated at 700°C
exhibited the highest vibration levels, correlating with excessive iron contamination in the oil, suggesting
a requirement for further thermal processing. Additionally, the analysis indicated that vibration and torque
values remained stable at 600°C but deteriorated significantly at 700°C. These results underscore the critical
influence of heat treatment and operational conditions on bearing performance. Consequently, this research
emphasizes the necessity for optimized heat treatment processes and routine maintenance protocols to
enhance bearing reliability in high-stress and elevated temperature environments, particularly in aerospace
applications. This work provides valuable insights into the factors impacting bearing failure and offers a
foundation for future studies aimed at improving bearing technology and maintenance practices.
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References
N. Kumar and R. Satapathy, "Bearings in aerospace, application, distress, and life: a review," Journal of Failure Analysis and Prevention, vol. 23, no. 3, pp. 915-947, 2023.
Z. Ö. Günindi, A. O. Kurban and M. Danışmaz "Soğutma fanının kestirimci bakım yöntemi uygulaması ile titreşim analizi ve yapısal esneklik arızasının giderilmesi," Icontech International Journal of Surveys, Engineering, Technology, 6 (1), 33-41, 2022. https://doi.org/10.46291/ICONTECHvol6iss1pp33-41.
S. Y. Hwang, N. R. Lee, and N. Kim, "Experiment and numerical study of wear in cross roller thrust bearings," Lubricants, vol. 3, no. 2, pp. 447-458, 2015.
M. Dong et al., "Vacuum carburization of 12Cr2Ni4A low carbon alloy steel with lanthanum and cerium ion implantation," Journal of Rare Earths, vol. 35, no. 11, pp. 1164-1170, 2017.
Y. Chen, Y. Guo, and R. Li, "State feedback control for partially distributed turboshaft engine with time delay and packet dropouts," in 2018 37th Chinese Control Conference (CCC), 2018: IEEE, pp. 9854-9859.
I. Arush, M. D. Pavel, and M. Mulder, "A singular values approach in helicopter gas turbine engines flight testing analysis," Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, vol. 234, no. 12, pp. 1851-1865, 2020.
C. R. Soto-Ocampo, J. M. Mera, J. D. Cano-Moreno, and J. L. Garcia-Bernardo, "Low-cost, high-frequency, data acquisition system for condition monitoring of rotating machinery through vibration analysis-case study," Sensors, vol. 20, no. 12, p. 3493, 2020.
R. Ganguli, "A survey of recent developments in rotorcraft design optimization," Journal of Aircraft, vol. 41, no. 3, pp. 493-510, 2004.
T. Deniz and M. Danışmaz, "Rulmanlarda ısıl işlem ve kestirimci bakım incelemesi," in Makine Mühendisliği Yaklaşımıyla: Uygulama Problemleri ve Yenilikçi Çözümler 1, vol. 1, U. A. Merdin Danışmaz Ed.: Bidge Yayınları, 2024, ch. V.
E. Inc. "Turbine Helicopter Power Transmission System." EPI Inc. https://www.epi-eng.com/gearbox_products/mark-25_gearbox.htm (accessed.2025)