PSI - Issue 82

Xiangnan Pan et al. / Procedia Structural Integrity 82 (2026) 125–130 X. Pan / Structural Integrity Procedia 00 (2026) 000–000

130 6

lies within these transitional domains, VHCF in the specimens does not necessarily occur. As σ m increases to 283 MPa, the VHCF domain exhibits the largest range: 122 MPa = σ a-1 < σ a ≤ σ a-3 = 213 MPa. When σ m = 849 MPa, the VHCF domain narrows down to the range: 91 MPa = σ a-2 ≤ σ a ≤ σ a-3 = 107 MPa. Overall, both the probability of VHCF occurrence in Ti62A and the corresponding allowable range of applied stress amplitude first increase and then decrease with the increase of tensile mean stress. References Ashby, M., 2016. Materials Selection in Mechanical Design. 5th ed. Butterworth-Heinemann, Oxford, UK. Atrens, A., Hoffelner, W., Duerig, T., Allison, J., 1983. Subsurface crack initiation in high cycle fatigue in Ti6Al4V and in a typical martensitic stainless steel. Scripta Metallurgica 17, 601–606. Bathias, C., 1999. There is no infinite fatigue life in metallic materials. Fatigue and Fracture of Engineering Materials and Structures 22(7), 559– 565. Bathias, C., Paris, P., 2005. Gigacycle Fatigue in Mechanical Practice. Marcel Dekker, New York, USA. Furuya, Y., 2008. Specimen size effects on gigacycle fatigue properties of high-strength steel under ultrasonic fatigue testing. Scripta Materialia 58, 1014–1017. Furuya, Y., 2011. Notable size effects on very high cycle fatigue properties of high-strength steel. Materials Science and Engineering: A 528, 5234– 5240. Furuya, Y., 2021. 10 11 gigacycle fatigue properties of high-strength steel. ISIJ Int. 61(1), 396–400. Furuya, Y., Takeuchi, E., 2014. Gigacycle fatigue properties of Ti-6Al-4V alloy under tensile mean stress. Materials Science and Engineering: A 598, 135–140. Furuya, Y., Shimamura, Y., Takanashi, M., Ogawa, T., 2022. Standardization of an ultrasonic fatigue testing method in Japan. Fatigue and Fracture of Engineering Materials and Structures 45(8), 2415–2420. Gao, C., Zhang, Y., Jiang, J., Fu, R., Du, L., Pan, X., 2024. Research viewpoint on performance enhancement for very-high-cycle fatigue of Ti-6Al 4V alloys via laser-based powder bed fusion. Crystals 14(9), 749. Montagnoli, F., Invernizzi, S., Carpinteri, A., 2023. VHCF ultrasonic testson EN AW-6082 aluminum alloy samples over a wide dimensional range. Fatigue and Fracture of Engineering Materials and Structures 46(8), 3099–3117. Meyers, M., Chawla, K., 2009. Mechanical Behavior of Materials. 2nd ed. Cambridge University Press, Cambridge, UK. Naito, T., Ueda, H., Kikuchi, M., 1983. Observation of fatigue fracture surface of carburized steel. Journal of the Society of Materials Science 32, 1162–1166. (in Japanese) Pan, X., Hong, Y., 2019. High-cycle and very-high-cycle fatigue behaviour of a titanium alloy with equiaxed microstructure under different mean stresses. Fatigue and Fracture of Engineering Materials and Structures 42(9), 1950–1964. Pan, X., Hong, Y., 2024. High-cycle and very-high-cycle fatigue of an additively manufactured aluminium alloy under axial cycling at ultrasonic and conventional frequencies. International Journal of Fatigue 185, 108363. Pan, X., Su, H., Sun, C., Hong, Y., 2018. The behavior of crack initiation and early growth in high-cycle and very-high-cycle fatigue regimes for a titanium alloy. International Journal of Fatigue 115, 67–78. Pan, X., Xu, S., Qian, G., Nikitin, A., Shanyavskiy, A., Palin-Luc, T., Hong, Y., 2020. The mechanism of internal fatigue-crack initiation and early growth in a titanium alloy with lamellar and equiaxed microstructure. Materials Science and Engineering: A 798, 140110. Pan, X., Qian, G., Hong, Y., 2021. Nanograin formation in dimple ridges due to local severe-plastic-deformation during ductile fracture. Scripta Materialia 194, 113631. Pan, X., Su, H., Liu, X., Hong, Y., 2024a. Multi-scale fatigue failure features of titanium alloys with equiaxed or bimodal microstructures from low-cycle to very-high-cycle loading numbers. Materials Science and Engineering: A 890, 145906. Pan, X., Du, L., Qian, G., Hong, Y., 2024b. Microstructure features induced by fatigue crack initiation up to very-high-cycle regime for an additively manufactured aluminium alloy. Journal of Materials Science and Technology 173, 247–260. Pan, X., Tao, Z., Long, X., 2025. Extraordinary specimen-size effect on long-life fatigue of additively manufactured AlSi10Mg. International Journal of Mechanical Sciences 301, 110524. Sakai, T., 2023. Historical review and future prospect for researches on very high cycle fatigue of metallic materials. Fatigue and Fracture of Engineering Materials and Structures 46(4), 1217–1255. Schijve, J., 2009. Fatigue of Structures and Materials. 2nd ed. Springer Netherlands, Wijdenes, The Netherlands. Suresh, S., 1998. Fatigue of Materials. 2nd ed. Cambridge University Press, Cambridge, UK. Tao, Z., Wang, Z., Pan, X., Su, T., Long, X., Liu, B., Tang, Q., Ren, X., Sun, C., Qian, G., Hong, Y., 2024. A new probabilistic control volume scheme to interpret specimen size effect on fatigue life of additively manufactured titanium alloys. International Journal of Fatigue 183, 108262.