A Theoretical Composite Model for Studying the Mechanical Properties of Bimodal Nanocrystalline Materials

Hui Jun Li; Rong Yuan Ju; Ying Guang Liu; Xiao Dong Mi; Hong Jian Yu; Xiu Lei Peng

doi:10.4028/www.scientific.net/AMM.687-691.4358

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 687-691A Theoretical Composite Model for Studying the...

A Theoretical Composite Model for Studying the Mechanical Properties of Bimodal Nanocrystalline Materials

Abstract:

A new theoretical model is proposed to describe the mechanical properties of bimodal nanocrystalline (BNC) materials.In this paper, we have studied the effect of grain size on the constitutive behavior and fracture of BNC materials. During the plastic deformation, dislocations emission from crack tips on the constitutive behavior of BNC materials are also analyzed, it is found that the nanocracks make a positive effect on the strain hardening instead of leading catastrophic failure. Numerical calculations have been carried out according to the model, the results show that the model can describe the enhanced strength and ductility of BNC materials successfully.

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Periodical:

Applied Mechanics and Materials (Volumes 687-691)

Pages:

4358-4361

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.687-691.4358

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Online since:

November 2014

Authors:

Hui Jun Li*, Rong Yuan Ju, Ying Guang Liu, Xiao Dong Mi, Hong Jian Yu, Xiu Lei Peng

Keywords:

Bimodal Nanocrystalline Materials, Constitutive Behavior, Grain Size, Nanocrack

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* - Corresponding Author

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