Effect of gradient microstructure on the tensile toughening of metallic glasses

被引：0
|
作者：
Wu Q. [1 ]
Jiang Y. [2 ]
Un L. [1 ]
Qiu K. [1 ]
Shi X. [1 ]
机构：
[1] College of Mechanics and Materials, Hohai University, Nanjing
[2] College of Aerospace Engineering, Nanjing University of Aeronautics, Nanjing
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2018年 / 35卷 / 05期
关键词：
Finite element method (FEM); Gradient microstructure; Metallic glass(MG); Shear banding; Tensile plasticity;
D O I：
10.13801/j.cnki.fhclxb.20170627.001
中图分类号：
学科分类号：
摘要：
In this contribution, numerical modeling was performed to interpret the effects of gradient microstructure on the tensile behaviors of Ti46Zr20V12Cu5Be17 metallic glass(MG). The free volume theory was incorporated into the ABAQUS code as a user material subroutine UMAT, which was used to depict the shear banding evolution in the MG matrix. Particles and initial free volume were assumed to be distributed in form of various gradient functions, and the resulting material models were loaded under uniaxial tension. The results show that the tensile plasticity of MG matrix composites containing groove shape gradient distribution of particle is best, and appear necking deformation during plastic deformation; For the initial free volume containing the convex gradient distribution, MG plastic is improved well; When the free volume gradient distribution span is changed, the smaller gradient span in MG, the more obvious plastic is increased; And as for particles, the number of plies on both sides is more, the main shear zone through in the sample is not easy to appear during plastic deformation. © 2018, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
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页码：1227 / 1235
页数：8
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