Surface recrystallization of a single crystal nickel-base superalloy

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	Surface recrystallization of a single crystal nickel-base superalloy
	J. Meng; T. Jin; X. F. Sun; Z. Q. Hu
	2011
发表期刊	International Journal of Minerals Metallurgy and Materials
ISSN	1674-4799
卷号	18 期号:2 页码:197-202
摘要	The recrystallization behavior of a single crystal nickel-base superalloy was investigated by shot peening and subsequent annealing. Two kinds of recrystallization microstructures, which arc intensively dependent on the annealing temperature, are shown in the nickel-base superalloy after shot peening and subsequent annealing. Surface recrystallized grains are obtained when the superalloy is annealed at solution treatment temperature. The nucleation of recrystallization originates from the dendritic core, where rapid dissolution of gamma' particles occurs. Cellular recrystallization is observed after annealing at lower temperatures. Cellular structures induced by high diffusivity of the moving boundary and more gamma' particles dissolution led by residual stress are developed from the surface region. Recrystallized kinetics of the shot-peened alloy annealed at 1050 degrees C accords with the Johnson-Mehl-Avrami-Kolmogorov equation. The low Avrami exponent is caused by the inhomogeneous distribution of stored energy, the decreasing of stored energy during recovery, and the strong resistance of boundary migration by gamma' particles.
部门归属	[meng, jie; jin, tao; sun, xiao-feng; hu, zhuang-qi] chinese acad sci, inst met res, dept superalloys, shenyang beijing 110016, peoples r china. [jin, tao] univ sci & technol beijing, state key lab adv met & mat, beijing 100083, peoples r china.;jin, t (reprint author), chinese acad sci, inst met res, dept superalloys, shenyang beijing 110016, peoples r china;tjin@imr.ac.cn
关键词	Nick-base Superalloy Single Crystals Recrystallization Shot Peening Annealing
URL	查看原文
WOS记录号	WOS:000289033900012
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30592
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. Meng,T. Jin,X. F. Sun,et al. Surface recrystallization of a single crystal nickel-base superalloy[J]. International Journal of Minerals Metallurgy and Materials,2011,18(2):197-202.
APA	J. Meng,T. Jin,X. F. Sun,&Z. Q. Hu.(2011).Surface recrystallization of a single crystal nickel-base superalloy.International Journal of Minerals Metallurgy and Materials,18(2),197-202.
MLA	J. Meng,et al."Surface recrystallization of a single crystal nickel-base superalloy".International Journal of Minerals Metallurgy and Materials 18.2(2011):197-202.