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나노재료 입계상의 소성변형에 대한 입계확산크립 모델

Title
나노재료 입계상의 소성변형에 대한 입계확산크립 모델
Other Titles
A Boundary Diffusion Creep Model for the Plastic Deformation of Grain Boundary Phase of Nanocrystalline Materials
Author
이재성
Keywords
Grain Boundary Phase; Boundary Diffusion Creep; Constitutive Model; Nanocrystalline Materials
Issue Date
2001-09
Publisher
한국소성가공학회
Citation
소성가공, v. 10, no. 5, page. 383-388
Abstract
In describing the deformation behavior of ultrafine-grained materials, a phase mixture model in which a polycrystalline material is regarded as a mixture of a crystalline phase and a grain boundary phase has been successful. The deformation mechanism for the grain boundary phase, which is necessary for applying the phase mixture model to polycrystalline materials, is modelled as a diffusional flow of matter along the grain boundary. A constitutive equation for the boundary diffusion creep of the boundary phase was proposed, in which the strain rate is proportional to (stress/grain size2). The upper limit of the stress of the boundary phase was set to equal to the strength of the amorphous phase. The proposed model can explain the strain size dependence of the strength of the grain boundary phase. Successful application of the model compared with published experimental data are described.
URI
https://www.dbpia.co.kr/journal/articleDetail?nodeId=NODE02116039https://repository.hanyang.ac.kr/handle/20.500.11754/160172
ISSN
1225-696X; 2287-6359
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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