Effect of Interactions Among Elements on Diffusion Process Associated with gamma ' Coarsening in a Ni-Based Single-Crystal Superalloy

doi:10.1007/s40195-020-01009-z

IMR OpenIR

	Effect of Interactions Among Elements on Diffusion Process Associated with gamma ' Coarsening in a Ni-Based Single-Crystal Superalloy
	Wang, Guang-Lei; Qi, Dong-Qing; Liu, Ji-De; Liu, Jin-Lai; Zhou, Yi-Zhou; Sun, Xu-Dong; Zhang, Hai-Feng; Sun, Xiao-Feng
	2020-07-01
发表期刊	ACTA METALLURGICA SINICA-ENGLISH LETTERS
卷号	33 期号:7 页码:1013-1020
摘要	Coarsening of cuboidal gamma ' precipitates and relevant diffusion process in Ni-based single-crystal superalloy CMSX-4 were investigated at 1000, 1020 and 1040 degrees C for specific times. The gamma ' coarsening kinetics followed a cubic rate law with time and was presumably controlled by bulk diffusion of elements in gamma matrix. The associated diffusion activation energy was experimentally determined to be about 300 kJ/mol when it is considered the temperature-dependent thermo-physical parameters in modified Lifshitz-Slyozov-Wagner theory. The influence of temperature on gamma/gamma ' microstructure is briefly discussed based on pseudo-binary [Ni]-[Al] phase diagram. Interactions among elements can effectively raise the local vacancy formation and vacancy-atom exchange barriers close to gamma- and gamma '-partitioning elements, respectively. Thus, it can significantly reduce the inter-coupling migrations of atoms during the macroscopic cross-diffusion process associated with gamma ' coarsening of Ni-based superalloys.
DOI	10.1007/s40195-020-01009-z
WOS记录号	WOS:000516777500001
引用统计	被引频次：3[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/321006/155715
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Wang, Guang-Lei,Qi, Dong-Qing,Liu, Ji-De,et al. Effect of Interactions Among Elements on Diffusion Process Associated with gamma ' Coarsening in a Ni-Based Single-Crystal Superalloy[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2020,33(7):1013-1020.
APA	Wang, Guang-Lei.,Qi, Dong-Qing.,Liu, Ji-De.,Liu, Jin-Lai.,Zhou, Yi-Zhou.,...&Sun, Xiao-Feng.(2020).Effect of Interactions Among Elements on Diffusion Process Associated with gamma ' Coarsening in a Ni-Based Single-Crystal Superalloy.ACTA METALLURGICA SINICA-ENGLISH LETTERS,33(7),1013-1020.
MLA	Wang, Guang-Lei,et al."Effect of Interactions Among Elements on Diffusion Process Associated with gamma ' Coarsening in a Ni-Based Single-Crystal Superalloy".ACTA METALLURGICA SINICA-ENGLISH LETTERS 33.7(2020):1013-1020.