Orientation Dependence of High Cycle Fatigue Behavior of a <111> Oriented Single-Crystal Nickel-Based Superalloy
نویسندگان
چکیده
High cycle fatigue failure has been recognized as one of the major forms aero-engine blades. This paper presents high testing a Ni-based superalloy near <111> orientation at 800 °C. The fracture morphology and dislocation configuration were analyzed in detail by scanning electron microscopy (SEM) transmission (TEM) to indicate influence deviation degree on properties. results show that significantly affects initiation slip systems, which is closely related performance. best life appears precise orientation, deformation behavior controlled multiple sets equivalent <110> {111} systems. With increase deviation, properties alloy degenerate significantly. On boundary <111>-<001>, two groups systems with maximum Schmid shear stress dominate behavior. other hand, <111>-<011> boundary, formation stacking faults rapid cutting γ’ precipitates negative effect life.
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ژورنال
عنوان ژورنال: Metals
سال: 2021
ISSN: ['2075-4701']
DOI: https://doi.org/10.3390/met11081248