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Simulation of PFZ on intergranular fracture based on XFEM and CPFEM

  • Materials, Metallurgy, Chemical and Environmental Engineering
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Abstract

A unit cell including the matrix, precipitation free zone (PFZ) and grain boundary was prepared, and the crystal plasticity finite element method (CPFEM) and extended finite element method (XFEM) were used to simulate the propagation of cracks at grain boundary. Simulation results show that the crystallographic orientation of PFZ has significant influence on crack propagation, which includes the crack growth direction and crack growth velocity. The fracture strain of soft orientation is larger than that of hard orientation due to the role of reducing the stress intensity at grain boundary in intergranular brittle fracture. But in intergranular ductile fracture, the fracture strain of soft orientation may be smaller than that of hard orientation due to the roles of deformation localization.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China

    Wen-hui Liu  (刘文辉), Qun Qiu  (邱群), Yu-qiang Chen  (陈宇强) & Chang-ping Tang  (唐昌平)

  2. Key Lab of High Temperature Wear Resistant Materials Preparation Technology of Hunan Province, Xiangtan, 411201, China

    Wen-hui Liu  (刘文辉), Qun Qiu  (邱群), Yu-qiang Chen  (陈宇强) & Chang-ping Tang  (唐昌平)

Authors
  1. Wen-hui Liu  (刘文辉)
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  2. Qun Qiu  (邱群)
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  3. Yu-qiang Chen  (陈宇强)
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  4. Chang-ping Tang  (唐昌平)
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Correspondence to Wen-hui Liu  (刘文辉).

Additional information

Foundation item: Projects(51475162, 51405153) supported by the National Natural Science Foundation of China; Project(14JJ5015) supported by the Hunan Provincial Natural Science Foundation, China

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Liu, Wh., Qiu, Q., Chen, Yq. et al. Simulation of PFZ on intergranular fracture based on XFEM and CPFEM. J. Cent. South Univ. 23, 2500–2505 (2016). https://doi.org/10.1007/s11771-016-3309-4

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  • DOI: https://doi.org/10.1007/s11771-016-3309-4

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