Abstract：The formation and microstructure change of recrystallization of a nickel-base single crystal superalloy are studied by X-ray,optical microscopy and SEM. It is shown that, at the temperature up to as-cast γ′ phase solvus, cellular discontinuous recrystallization may be observed; and above this temperature, rapid recrystallization occurs in the surface layers through the growth of recrystallization grain. With increasing temperature, recrystallization grains begin to congregate and grow larger. The recrystallization layer develop inward continunally, and the thickness of recrystallization layer increases with the increasement of testing temperature. Dissolution of as-cast γ′ phase is importanty factor of formation of recrystallization grains.
卫平, 李嘉荣, 钟振纲. 一种镍基单晶高温合金的表面再结晶研究[J]. 材料工程, 2001, 0(10): 5-8.
WEI Ping, LI Jia-rong, ZHONG Zhen-gang. Study on The Surface Recrystallization of a Ni-based Single Crystal Superalloy. Journal of Materials Engineering, 2001, 0(10): 5-8.
[1] 陈荣章.铸造涡轮叶片制造和使用中的一个问题-表面再结晶[J].航空制造工程,1990,4:22. [2] J M Oblak and W A Owczarski. Cellular Recrystallization in a Nickel-Base Superalloy, Transactions of The Metallurgical Society ofAIME, (242): 1563-1568. [3] A Porter, B Ralph. The recrystallization of nickel-base superalloys [J]. Journal of Materials Science, 1981, 16: 707-713. [4] S D Bond, J W Martin. Surface Recrystallization in a Single Crystal Nickel-Based Superalloy [J]. Journal of Materials Science, 1984, 19: 3867-3872. [5] K Kusunoki, K Sumino, Y Kawasaki, et al. Effect of the Amont of γ＇and Oxide Content on the Secondary Recrystallization Temperature of Nickel-Base Superalloys [J]. Metallurgical Transactions A, 1990, 21A (3): 547-555. [6] 谢希文,路若英编著.金属学原理[M].北京:航空工业出版社,1989. [7] 胡得林主编.金属学原理[M].西安:西北工业大学出版社,1987. [8] 范雄主编.X射线金属学[M].北京:机械工业出版社,1980. [9] R Biirgel, P D Portella, J Preuhs. Recrystallization in single crystals of nickel base superalloys [A]. Superalloys 2000 [C].Warrendale, PA: TMS, 2000, 229-238.
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