PSI - Issue 33

Julio A. Ruiz Vilchez et al. / Procedia Structural Integrity 33 (2021) 658–664 Author name / Structural Integrity Procedia 00 (2019) 000–000

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 Fatigue endurance of this steel under ultrasonic loading is closely related to the crack initiation inclusion: size, nature, shape; and the physic-chemical phenomena around the crack initiation inclusion or the crack initiation void,  Fracture surfaces show a circular zone contouring the crack initiation inclusion, which increase as applied load decreases. This result may be explained because at lower load levels the slow crack propagation is amplified and covers larger area of the total crack propagation area.  Fatigue endurance at high applied load (585 MPa) is close to 7 – 10 million of cycles; it increases to 700 – 900 million of cycles at low applied load (389 MPa).  Fatigue life in the “Stable Zone” of crack propagation has been evaluated with the Paris-Gomez-Anderson Law; the number of cycles in this zone represents only the ≈ 2.5 % of the total fatigue life, Bathias and Paris (2005). Acknowledgements The authors express their special mention of gratitude to CONACYT (The National Council for Science and Technology, Mexico), for the financial support destined to this study. An additional mention of gratitude to the University of Michoacán in Mexico for the received support in the development of this work. Abe, T., Furuya, Y., Matsuoka, S., 2004. Gigacycle fatigue properties of 1800 MPa class spring steels. Fatigue & Fracture of Engineering Materials & Structures 27(2), 159-167- Bai, Y., Zhao, C., Yang, J., Hong, R., Weng, Can., Wang, H., 2021. Microstructure and machinability of selective laser melted high-strength maraging steel with heat treatment. Journal of Material Procesing Technology 288, 116906. Bathias, C., Paris, Paul C., 2005. Gigacycle fatigue in mechanical practice. (Ed.) Marcel Deker, New York, pp. 304. Damon, J., Hanemann, T., Dietrich, S., Graf, G., Lang, K.-H., Schulze, V., 2019. Orientation dependent fatigue performance and mechanisms of selective laser melted maraging steel X3NiCoMoTi18-9-5. International Journal of Fatigue 127, 395-402. Dominguez, G.M., 2008. Prediction of very high cycle fatigue failure for high strength steels, based on the inclusion geometrical properties. Mechanics of Materials 40(8), 636-640. Elangeswaran, Ch., Gurung, K., Koch, R., Cutolo, A., Van Hooreweder, B., 2020. Post-treatment selection for tailored fatigue performance of 18Ni300 maraging steel manufactured by laser powder bed fusion. Fatigue and Fracture of Engineering Materials and Structures 43 (10), 2359-2375. Ishii, H., Yagazaki, T., Akagi, H., 2002. Evaluation of giga ‐ cycle fatigue properties of some maraging steels by intermittent ultrasonic fatigue testing. Fatigue and Fracture of Engineering Materials and Structures 25 (8.9), 831-835. Karr, U., Schuller, R., Fitzka1, M., Schönbauer, B., Tran, D., Pennings, B., Mayer H., 2017. Influence of inclusion type on the very high cycle fatigue properties of 18Ni maraging steel. Journal of Materials Science 52, 5954–5967. Mooney, B., Kourousis, K.I., 2020. A Review of actors afecting the mechanical properties of maraging steel 300 fabricated via laser powder bed fusion. Metals 10, 1273. Sander, M., Mûller, T., Lebahn, J., 2014. Influence of mean stress and variable amplitude loading on the fatigue behaviour of a high-strength steel in VHCF regime. International Journal of Fatigue 62, 10-20. Spriestersbach, D., Grad, P., Kerscher, E,, 2014. Influence of different non-metallic inclusion types on the crack initiation in high-strength steels in the VHCF regime. International Journal of Fatigue 64, 114-120. Sun, Ch., Lei Z., Xie, J., Hong, Y., 2013. Effects of inclusion size and stress ratio on fatigue strength for high-strength steels with fish-eye mode failure. International Journal of Fatigue 48, 18-27. Sen, R., Choudhuri, B., Deb Barma, J., Chakraborti, R., 2021. Optimization of wire EDM parameters using teaching learning based algorithm during machining of maraging steel 300. MaterialsToday Proceedings 5(2 Part 2), 7541-7551 Turk, Ch., Zunko, H., Aumayr, Ch., Leitner, H., Kapp, M., 2019. Advances in maraging steels for additive manufacturing. Berg Huettenmaenn Monatsh 164, 112-116. Wang, W., Yan, W., Duan, Q., Shan, Y., Zhang, Z., Yang, K., 2010. Study on fatigue property of a new 2.8 GPa grade maraging steel. Materials Science and Engineering A 527(13-14), 3057-3063. References