High Cycle Fatigue Behavior of HAYNES282 Superalloy

Microstructure-Based Computational Fatigue Life Prediction of Structural Materials

“…Obviously, for both strain amplitudes, generally the maximum local plastic strain range and calculated HCF life are more scattered compared to those of the LCF case. Based on the data reported inTable 4.10 and 4.11, except for simulation 4 and simulation 10 with extremely long predicted HCF life, the predicted HCF life scattering, 3.62 and 4.52, for the stress amplitude of 415 MPa and 400 MPa, respectively well coincides with that of the experimental data (3.42 and 3.28)[86]. In addition, the predicted HCF lives of Haynes 282 are on average lower than the experimental data by larger extent as compared to that for the LCF case.…”

“…Yang et al [86]. The calibrated parameters are presented in Table 4.5 and the effectiveness of calibration is verified in Figure 4.16, which shows a good agreement between the simulated tensile curve and the experimental observation.…”

“…The samples of Haynes 282 for HCF simulation are rods processed by standard heat treatment [86]: solution treatment at 1120 -1150 ℃ followed by water cooling; first aging at 1010 ℃ for 2 hours followed by air cooling; second aging at 788 ℃ for 8 hours followed by air cooling. The optical microstructure of the material is shown in Figure 4…”

“…Grain size is another factor influencing the size of an RVE model. The grain size of the RVE model in the present study is taken according to the SEM and optical images, Figure 4.1 for LCF [84] and Figure 4.3 for HCF [86]. By applying the intercept procedure [107], the approximate average diameter of grains in…”

Effects of thermal exposure on high-cycle-fatigue behaviours in Ni-based superalloy GH4169

“…Inconel 718) in the LCF test at 650°C. In addition, Yang et al [26] performed HCF tests for a nickel-based superalloy at room temperature, 700°C and 760°C. The results showed that the fatigue strength was reduced slightly with the increasing temperature, but the related mechanisms were not well explained.…”