Investigation on γ-Channel Widening during Uniaxial Creep Test of a Ni-Base Single Crystal Superalloy
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.
S.-G. Kang and T. Kobayashi
T. Jin et al., "Investigation on γ-Channel Widening during Uniaxial Creep Test of a Ni-Base Single Crystal Superalloy", Materials Science Forum, Vols. 449-452, pp. 545-548, 2004