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Acta Mechanica Sinica

, Volume 32, Issue 1, pp 135–143 | Cite as

An anisotropic micromechanics model for predicting the rafting direction in Ni-based single crystal superalloys

  • Shuang-Yu Li
  • Wen-Ping WuEmail author
  • Ming-Xiang Chen
Research Paper

Abstract

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.

Keywords

Ni-based single crystal superalloys Rafting Equivalent inclusion theory Stroh formalism 

Notes

Acknowledgments

The work was supported by The National Natural Science Foundation of China (Grants 11102139 and 11472195), and The Natural Science Foundation of Hubei Province of China (Grant 2014CFB713).

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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics; Institute of Mechanics, Chinese Academy of Sciences and Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Department of Engineering Mechanics, School of Civil EngineeringWuhan UniversityWuhanChina
  2. 2.State Key Laboratory of Water Resources & Hydropower Engineering ScienceWuhan UniversityWuhanChina

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