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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-Lei1,2; Qi, Dong-Qing1; Liu, Ji-De2; Liu, Jin-Lai2; Zhou, Yi-Zhou2; Sun, Xu-Dong1; Zhang, Hai-Feng1,2; Sun, Xiao-Feng2
Corresponding AuthorLiu, Ji-De(jdliu@imr.ac.cn) ; Liu, Jin-Lai(jlliu@imr.ac.cn)
2020-02-27
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Pages8
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.
KeywordNi-based superalloy Coarsening kinetics Diffusion activation energy Elemental interaction
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China ; National Science and Technology Major Project
DOI10.1007/s40195-020-01009-z
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000516777500001
PublisherCHINESE ACAD SCIENCES, INST METAL RESEARCH
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/137374
Collection中国科学院金属研究所
Corresponding AuthorLiu, Ji-De; Liu, Jin-Lai
Affiliation1.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
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,2020:8.
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.
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