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Study of gamma ' rafting under different stress states - A phase-field simulation considering viscoplasticity
Yang, Min1; Zhang, Jun1; Wei, Hua2,3; Zhao, Yan4; Gui, Weimin3; Su, Haijun1; Jin, Tao3; Liu, Lin1
Corresponding AuthorZhang, Jun(zhjscott@nwpu.edu.cn) ; Wei, Hua(huawei@zju.edu.cn)
2018-11-15
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume769Pages:453-462
AbstractThe gamma'/gamma evolution in nickel superalloys under different stress states and stress values at 1223 K was simulated through the phase-field method to study the 45 degrees-type rafting mechanism and the influence of orientation deviation on the gamma'/gamma evolution. The simulation results demonstrate that for the shear stress case, 45 degrees-type rafting appears under the external shear stress of 137 MPa. In 45 degrees-type rafting, the equivalent stress inhomogeneity in the gamma channel induces a directional diffusion of gamma'-forming elements into the low-equivalent-stress areas which are distributed along the diagonal directions. Based on the simulations, a model for the 45 degrees-type rafting mechanism has been proposed. In addition, the influence of orientation deviation on gamma'/gamma evolution originates from the introduction of shear stress components. With increasing external stress, the shear stress component is increased, which causes the rafting direction to approach the 45 degrees direction. Furthermore, the existence of orientation deviation accelerates the process of gamma' rafting. (C) 2018 Elsevier B.V. All rights reserved.
KeywordSuperalloys gamma ' rafting Shear creep Phase-field model Plasticity
Funding OrganizationNational Natural Science Foundation of China ; National Key Research and Development Program
DOI10.1016/j.jallcom.2018.07.317
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51331005] ; National Natural Science Foundation of China[51690163] ; National Natural Science Foundation of China[51631008] ; National Natural Science Foundation of China[51371173] ; National Natural Science Foundation of China[51771148] ; National Key Research and Development Program[2016YFB0701405] ; National Key Research and Development Program[2017YFB0702902]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000449481200054
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/130368
Collection中国科学院金属研究所
Corresponding AuthorZhang, Jun; Wei, Hua
Affiliation1.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China
2.Zhejiang Univ, Ctr Centrifugal Hypergrav Res, Hangzhou 310058, Zhejiang, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Liaoning, Peoples R China
4.Shanghai Univ, State Key Lab Adv Special Steel, Shanghai 200444, Peoples R China
Recommended Citation
GB/T 7714
Yang, Min,Zhang, Jun,Wei, Hua,et al. Study of gamma ' rafting under different stress states - A phase-field simulation considering viscoplasticity[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,769:453-462.
APA Yang, Min.,Zhang, Jun.,Wei, Hua.,Zhao, Yan.,Gui, Weimin.,...&Liu, Lin.(2018).Study of gamma ' rafting under different stress states - A phase-field simulation considering viscoplasticity.JOURNAL OF ALLOYS AND COMPOUNDS,769,453-462.
MLA Yang, Min,et al."Study of gamma ' rafting under different stress states - A phase-field simulation considering viscoplasticity".JOURNAL OF ALLOYS AND COMPOUNDS 769(2018):453-462.
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