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Effect of Skew Angle of Holes on the Thermal Fatigue

Thermal fatigue (TF) cracks often initiate and propagate at the edge of holes, which leads to the failure of blades [5, 6]. Therefore, understanding the crack initiation and propagation around the cooling holes during thermal cycles provides important information for Effect of surface nanocrystallization on fatigue crack Sep 09, 2020 · Both the initiation life and propagation life of fatigue cracks could be increased after USSP treatment. When the cyclic stress was set as 225 MPa, the initiation life and propagation life of fatigue cracks in the 45-min USSP-treated pure Zr were 3.1 times and 1.48 times those of

Evolution of silicon particle damage on fatigue crack

Jul 06, 2017 · Low-cycle fatigue tests under both mechanical cyclic and thermal cyclic loadings were conducted to study the behavior of fatigue crack initiation and early propagation by means of metallographic and scanning electron microscopy (SEM). The damage mode of silicon particles has significant influence on crack behavior. Investigation on the Fatigue Crack Propagation Behavior of Jul 29, 2020 · This study investigated the fatigue crack propagation (FCP) behavior of different regions (base metal (BM), heat-affected zone (HAZ) and weld metal (WM)) of dissimilar metal welded joints of L360MS pipeline steel with Inconel 625 welding wire as the filler material. The effect of the microstructure on FCP was discussed. The results indicated that the fatigue crack growth rates (da/dN) for the Transient thermal fatigue crack propagation behavior of a Feb 01, 2020 · It was found that the thermal fatigue-crack initiation and propagation of Ni-based single crystal superalloy are strongly influenced by the crystallographic orientation , . Nevertheless, Getsov discovered the fracture proceeds in a non-crystallographic mode in some cases and the cracks change the direction of propagation.