Effect of cyclic recovery heat treatment on surface recrystallization of a directionally solidified superalloy |
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| Authors: | Guang XIE Jian ZHANG Lang-hong LOU |
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| Affiliation: | 1. Superalloys Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;;2. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China |
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| Abstract: | Microstructural evolution and micro-hardness of a directionally solidified Ni-base superalloy subjected to shot-peening during cyclic recovery heat treatment was studied. It was found that γ' dissolved and dislocation annihilation occurred during heating, while γ' re-precipitated when temperature dropped. Due to the formation of a stable dislocation network at γ/γ' interface, full recovery and therefore complete elimination of the surface recrystallization are difficult by the present cyclic recovery heat treatment. |
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