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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
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
Volume33Issue:7Pages:1013-1020
AbstractCoarsening 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.
DOI10.1007/s40195-020-01009-z
WOS IDWOS:000516777500001
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/155715
Collection中国科学院金属研究所
Recommended Citation
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.
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