A Three-Dimensional Multi-scale Plasticity Model for Metal-Intermetallic Laminate Composites Containing Phases of the L12 Structure

doi:10.1007/s40195-018-0737-1

Acta Metallurgica Sinica (English Letters) ›› 2018, Vol. 31 ›› Issue (12): 1265-1271.DOI: 10.1007/s40195-018-0737-1

收稿日期:2018-01-03 修回日期:2018-02-19 出版日期:2018-12-10 发布日期:2018-12-18

A Three-Dimensional Multi-scale Plasticity Model for Metal-Intermetallic Laminate Composites Containing Phases of the L1₂ Structure

Yana D. Lipatnikova¹(), Vladimir A. Starenchenko¹, Yuliya V. Solov’eva¹, Larisa A. Valuiskaya²

1 Tomsk State University of Architecture and Building,Solyanaya Sq. 2, Tomsk, Russia 634003
2 Siberian State Medical University, 2 Moskovsky trakt, Tomsk, Russia 634055

Received:2018-01-03 Revised:2018-02-19 Online:2018-12-10 Published:2018-12-18

摘要/Abstract

Abstract:

A three-dimensional plasticity model was developed and applied to metal-intermetallic laminate composites containing phases of the L1₂ structure. A multi-scale approach that combined the methods of continuum mechanics and dislocation kinetics was used. This model takes account of the different mechanisms of self-locking superdislocations, the dislocations and the dislocation walls’ density storage for each type of layer at the micro-scale. At the meso-scale, the solutions to the dislocation kinetics equations, in the form of stress-strain curves, were used to create the properties of a three-dimensional representative element. The numerical simulation study of the macroscopic deformation was carried out with the finite element method using the dynamic model of continuum mechanics, which included the classical conservation laws, constitutive equations and the equation of state. It was shown that the simulation results generated using this model were in good agreement with the mechanical tests conducted on the single crystals of the L1₂ structure. The model provides an excellent description of the high-temperature plastic strain superlocalization effect of single crystal intermetallics of the L1₂ structure. This paper describes the numerical results of the study of the tension and compression tests of metal-intermetallic laminate composites containing phases of the L1₂ structure. The model allows the description of the distribution of the accumulated plastic strain inhomogeneities and is capable of predicting the strengthening properties and plastic behaviour of the metal-intermetallic laminate composites containing phases of the L1₂ structure.

Key words: Plasticity model, Metal-intermetallic laminate composites, Layered composites, L1₂ structure, Tension, Compression

. [J]. Acta Metallurgica Sinica (English Letters), 2018, 31(12): 1265-1271.

Yana D. Lipatnikova, Vladimir A. Starenchenko, Yuliya V. Solov’eva, Larisa A. Valuiskaya. A Three-Dimensional Multi-scale Plasticity Model for Metal-Intermetallic Laminate Composites Containing Phases of the L1₂ Structure[J]. Acta Metallurgica Sinica (English Letters), 2018, 31(12): 1265-1271.

图/表 6

Fig. 1 Unit cell model of the L12 structure

Fig. 2 Model of the layered metal-intermetallic composite

Fig. 3 a Stress-strain curves of an elementary volume of each phase and the laminate average stress-strain curve, where σM is the von Mises stress, b distribution of the plastic strain intensity in the sample under uniaxial compression

Fig. 4 a Stress-strain curves of an elementary volume of each phase and the laminate average stress-strain curve, where σM is the von Mises stress, b distribution of the plastic strain intensity in the sample under uniaxial compression

Fig. 5 a Stress-strain curves of an elementary volume of each phase and the laminate average stress-strain curve, where σM is the von Mises stress, b distribution of the plastic strain intensity in the sample under uniaxial tension

Fig. 6 a Stress-strain curves of an elementary volume of each phase and the laminate average stress-strain curve, where σM is the von Mises stress, b distribution of the plastic strain intensity in the sample under uniaxial tension

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A Three-Dimensional Multi-scale Plasticity Model for Metal-Intermetallic Laminate Composites Containing Phases of the L1₂ Structure

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