An anisotropic micromechanics model for predicting the rafting direction in Ni-based single crystal superalloys
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- 作者：Shuang-Yu Li ; Wen-Ping Wu ; Ming-Xiang Chen
- 关键词：Ni ; based single crystal superalloys ; Rafting ; Equivalent inclusion theory ; Stroh formalism
- 刊名：Acta Mechanica Solida Sinica
- 出版年：2016
- 出版时间：February 2016
- 年：2016
- 卷：32
- 期：1
- 页码：135-143
- 全文大小：797 KB
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26.Ting, T.C.T.: Anisotropic Elasticity. Oxford University, Oxford (1996)MATH - 作者单位：Shuang-Yu Li (1)
Wen-Ping Wu (1) (2)
Ming-Xiang Chen (1) (2)
1. Department of Engineering Mechanics, School of Civil Engineering, Wuhan University, Wuhan, 430072, China
2. State Key Laboratory of Water Resources & Hydropower Engineering Science, Wuhan University, Wuhan, 430072, China - 刊物类别：Engineering
- 刊物主题：Theoretical and Applied Mechanics
Mechanics, Fluids and Thermodynamics
Engineering Fluid Dynamics
Numerical and Computational Methods in Engineering
Chinese Library of Science - 出版者：The Chinese Society of Theoretical and Applied Mechanics; Institute of Mechanics, Chinese Academy of
- ISSN：1614-3116
文摘
An anisotropic micromechanics model based on the equivalent inclusion method is developed to investigate the rafting direction of Ni-based single crystal superalloys. The micromechanical model considers actual cubic structure and orthogonal anisotropy properties. The von Mises stress, elastic strain energy density, and hydrostatic pressure in different inclusions of micromechanical model are calculated when applying a tensile or compressive loading along the [001] direction. The calculated results can successfully predict the rafting direction for alloys exhibiting a positive or a negative mismatch, which are in agreement with pervious experimental and theoretical studies. Moreover, the elastic constant differences and mismatch degree of the matrix and precipitate phases and their influences on the rafting direction are carefully discussed.