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 1,2; Qi, Dong-Qing 1; Liu, Ji-De 2; Liu, Jin-Lai 2; Zhou, Yi-Zhou 2; Sun, Xu-Dong 1; Zhang, Hai-Feng 1,2; Sun, Xiao-Feng 2
通讯作者	Liu, Ji-De(jdliu@imr.ac.cn) ; Liu, Jin-Lai(jlliu@imr.ac.cn)
	2020-02-27
发表期刊	ACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN	1006-7191
页码	8
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.
关键词	Ni-based superalloy Coarsening kinetics Diffusion activation energy Elemental interaction
资助者	National Key R&D Program of China ; National Natural Science Foundation of China ; National Science and Technology Major Project
DOI	10.1007/s40195-020-01009-z
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2017YFA0700704] ; National Natural Science Foundation of China[51871221] ; National Science and Technology Major Project[2017-VI-0002-0072]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000516777500001
出版者	CHINESE ACAD SCIENCES, INST METAL RESEARCH
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/321006/137374
专题	中国科学院金属研究所
通讯作者	Liu, Ji-De; Liu, Jin-Lai
作者单位	1.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110004, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Peoples R China
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,2020:8.
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,8.
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 (2020):8.