PSI - Issue 2_B

B.M. Schönbauer et al. / Procedia Structural Integrity 2 (2016) 1149–1155 Author name / Structural Integrity Procedia 00 (2016) 000–000

1155

7

50 µm cannot be treated with a fracture mechanical approach for the investigated material. In this case, the fatigue limit might be predicted using a fatigue notch factor which integrates the stress concentration factor and the notch root radius, e.g. the widely used Peterson equation.

Acknowledgement

The authors would like to thank Dr. Shengqi Zhou of National Physical Laboratory (UK) for providing with pre pitted test specimen.

References

Dowling, N.E., 2013. Mechanical behavior of materials: Engineering methods for deformation, fracture, and fatigue. Pearson. Mayer, H., 2015. Recent developments in ultrasonic fatigue. Fatigue & Fracture of Engineering Materials & Structures, 3-29. Murakami, Y., 2002. Metal fatigue; Effects of small defects and nonmetallic inclusions. Elsevier. Murakami, Y., Endo, M., 1983. Quantitative evaluation of fatigue strength of metals containing various small defects or cracks. Engineering Fracture Mechanics 17, 1-15. Murakami, Y., Endo, M., 1986. Effect of hardness and crack geometries on ∆ K th of small cracks emanating from small defect, in: Miller, K.J., de Los Rios, E.R. (Eds.), The Behavior of Short Fatigue Crack, Vol. EGF Pub. 1. Mechanical Engineering Publications, London, pp. 275-293. Nisitani, H., 1968. Effects of size on the fatigue limit and the branch point in rotary bending tests of carbon steel specimens. Bulletin of JSME 11, 947-957. Noguchi, H., Nishitani, H., Goto, H., 1988. Semi-inifinite body with a drill-hole shaped pit undet tension. Transactions of the Japan Society of Mechanical Engineers Series A 54, 977-982. Peterson, R.E., 1959. Notch sensitivity. Metal fatigue, 293-306. Schönbauer, B.M., Stanzl-Tschegg, S.E., Perlega, A., Salzman, R.N., Rieger, N.F., Turnbull, A., Zhou, S., Lukaszewicz, M., Gandy, D., 2015. The influence of corrosion pits on the fatigue life of 17-4PH steam turbine blade steel. Engineering Fracture Mechanics 147, 158-175. Schönbauer, B.M., Yanase, K., Endo, M., 2016. VHCF properties and fatigue limit prediction of precipitation hardened 17-4PH stainless steel. International Journal of Fatigue 88, 205-216.