Effects of the Coordinates Planes Crystal Orientation on the Structural Strength of Single-Crystal Turbine Vanes and Blades

Chen, Jinxiang; Hashimoto, Ryosaku; Fukuyama, Yoshitaka; Matsushita, Masayuki; Ogawa, Akinori; Osawa, Makoto; Yokokawa, Toshio; Harada, Hiroshi

doi:10.1299/kikaia.72.432

Cited by 1 publication

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“…The role of SCOs in the deformation mechanism of single-crystal turbine blades has been investigated in very few studies so far. Chen et al 4 found variations in the strength of single-crystal turbine blades and stress values around at different locations with change in the crystal orientations. Zienkiewicz et al 5 investigated the fatigue failure of single-crystal nickel base superalloy turbine blade and concluded that the control of secondary and primary crystallographic orientations increases the fatigue resistance of turbine blades.…”

Section: Introductionmentioning

confidence: 99%

Effect of secondary crystal orientations on the deformation anisotropy for nickel-based single-crystal plate with notch feature

Zhai

Khan

Correia

et al. 2019

The Journal of Strain Analysis for Engineering Design

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The effects of the secondary crystal orientations on the nickel-based single-crystal superalloy turbine blades were investigated. The stress concentration features were used for investigation of the optimal secondary crystal orientation leading to the higher strength of the single-crystal turbine blades. The crystal plastic finite element method coupled with micromechanics constitutive model is applied to study the effect of secondary crystal orientation on plastic deformation and mechanical behavior around the cooling holes and notches with the primary (load) orientation fixed at [001] direction. For nickel-based superalloy plates with holes or notches, the secondary crystal orientation effect on the strength needs to be clarified at various load levels. The maximum von Mises stress in the single-crystal alloy varies significantly with variation in the secondary crystal orientations. It was found that only two slip systems dominate the deformation process of the material owing to their favorable orientation with loading. The secondary orientation of 45°was identified with lowest resolved shear stress in the dominating slip systems and potential of producing higher strength for single-crystal turbine blades.

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Section: Introductionmentioning

confidence: 99%