Results 1 to 10 of about 2,071 (193)
Modelling freckles and spurious grain formation in directionally solidified superalloy castings [PDF]
Communications MaterialsSegregation channels with misoriented spurious grains, known as freckles, are an unacceptable casting defect in superalloy turbine blades. A digital-twin method to predict segregation channels was proposed in our previous studies; however, the formation ...
Haijie Zhang +6 more
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Freckle Defect Formation near the Casting Interfaces of Directionally Solidified Superalloys. [PDF]
Materials (Basel), 2016 Freckle defects usually appear on the surface of castings and industrial ingots during the directional solidification process and most of them are located near the interface between the shell mold and superalloys. Ceramic cores create more interfaces in the directionally solidified (DS) and single crystal (SX) hollow turbine blades.
Hong J +7 more
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Salt-deposit hot corrosion behaviors of directionally solidified DZ466 superalloy
工程科学学报, 2015 Hot corrosion behaviors of DZ466 alloy at 850℃ and 950℃ were investigated by using a NaCl/Na2SO4salt-deposit method. It is found that there are three corrosion layers on the alloy.
DING Xian-fei +5 more
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Anisotropic acoustic properties of directionally solidified nickel-based superalloy DZ444
Cailiao gongcheng, 2019 Directionally solidified nickel-based superalloy DZ444 specimens with different directions were selected. The crystal orientation and microstructure were characterized by electron back-scattered diffraction technique and so on.
LUO Zhong-bing +3 more
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Journal of Aeronautical Materials, 2021 High temperature aging treatment was first conducted on the rejuvenated directionally solidified superalloy to simulate the re-service aging damage of turbine blades and the virgin directionally solidified superalloy respectively.
TANG Wenshu +5 more
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Crystals, 2022 The influence of service-induced degradation on residual life is very important for the safe service of turbine blades. In this study, a series of simulation experiments were conducted on a directionally solidified superalloy under (880–1020) °C/(70–220)
Xiaotong Guo +5 more
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Directionally Solidified Materials:Nickel‐base Superalloys forGas Turbines [PDF]
Texture, Stress, and Microstructure, 1990 From the first forged turbine blades made of iron base alloys to the present nickel base single‐grain turbine blades and vanes manufactured by directional solidification, an enormous amount of research has been directed to attaining the hottest possible combustion chamber temperatures in jet engines.
Jacques Lacaze, Alain Hazotte
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On the origin of mosaicity in directionally solidified Ni-base superalloys [PDF]
Acta Materialia, 2021 This article addresses the formation of low angle grain boundaries which give rise to mosaicity, a phenomenon which has only recently received attention in the single crystal Ni-base superalloy field. In this work, post-mortem advanced microscopy characterisation techniques are employed to deduce the dendrite tip growth kinetics from transverse ...
Joel Strickland +8 more
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Tensile Deformation Behavior of a Directionally Solidified Superalloy at Cryogenic Temperatures
Crystals, 2022 Ni-based superalloys are widely used to manufacture gas turbine core components, but reports on the reliability of superalloys at cryogenic temperatures are still limited.
Xiaotong Guo +6 more
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Cailiao gongcheng, 2016 In order to investigate the corrosion performance on intersecting and longitudinal surfaces of unoxidized and oxidized directionally solidified superalloys, Ni-base directionally solidified superalloy DZ125 and Co-base directionally solidified superalloy
MA Luo-ning, WANG Tian-you, ZHANG Zheng
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