Investigation on γ-Channel Widening during Uniaxial Creep Test of a Ni-Base Single Crystal Superalloy

Tao Jin; L.R. Liu; Na Ru Zhao; Zhi  Wang; Xiao Feng Sun; Heng Rong Guan; Zhuang Qi Hu

doi:10.4028/www.scientific.net/MSF.449-452.545

Paper Titles

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Characteristics of Material Degradation for Thermal Aged X20CrMoV12 1 Steel
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Mechanical Behavior of As-Cast and High Temperature Exposed Ni-Base Superalloy B1900
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Investigation on γ-Channel Widening during Uniaxial Creep Test of a Ni-Base Single Crystal Superalloy
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Tensile Deformation Behavior of M963 Cast Nickel-Base Superalloy
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Effect of Melt Treatment on the Microstructure and Creep-Rupture Behavior of M963 Cast Nickel-Base Superalloy
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Tensile Deformation Behavior of M963 Cast Nickel-Base Superalloy
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Low Cycle Fatigue and Fracture Behavior of Nickel-Base Superalloy CM247LC at 760°C
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Investigation on γ-Channel Widening during Uniaxial Creep Test of a Ni-Base Single Crystal Superalloy

Abstract:

Investigation of γ -channel widening behavior in a nickel-base single crystal superalloy during uniaxial tensile creep tests was carried out. Scanning electron microscopy (SEM) was adopted to reveal the microstructural evolution of γ -channel and the dimension of γ -channel. It was found that different tests condition such as temperature, time and stress in tensile creep tests all influenced the γ -channel widening behavior, and a parabolic rate law governs the mean increase value of γ -channel width. The stress and temperature enhanced the γ -channel widening. The γ -channel widening was the result of directionally diffusion of multiatom.