Scholarlink

<p>The fracture mode of AA 5083 Al–Mg alloy is predominantly intergranular. For this, a three-dimensional Crystal Plasticity Finite Element (CPFE) model is developed to investigate Grain Boundary (GB) fracture behavior under uniaxial tensile loading. Following parameter calibration, the simulated tensile strength demonstrates consistency with experimental data, with a high accuracy of 97%. Furthermore, by integrating CPFE model incorporating the dislocation slips with a GB model, a two-dimensional tri-junction crystal plasticity framework is established, and cohesive elements are implemented within the three grains to simulate GB fracture process under uniaxial tension. This tri-junction model shows a good convergence. The effect of grain orientation, location and GB thickness on GB fracture is investigated. The results reveal that grain orientation and location significantly influences GB fracture behavior. It is found that the Goss-Brass-P orientation combination demonstrates the optimal comprehensive mechanical properties, achieving a strain energy density of 7.09&#xa0;MJ/m<sup>3</sup>. Furthermore, there exists a threshold effect about GB thickness on comprehensive property. The optimal performance is obtained when the cohesive that determines GB thickness is set to 2.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Crystal plasticity-based intergranular facture simulation of AA 5083 aluminum alloy for tri-junction grain boundary

  • 期刊论文

  • 发表日期：

    2025年10月17日

查看全文
  • Xin Zhang,
  • Qi Zhao,
  • Hongxia Zhang,
  • Zhipeng Zhai,
  • Xiang Chen,
  • Ying Hu,
  • Zhuo Han,
  • Nianfeng Zhang,
  • Yucheng Gui,
  • Magd Abdel Wahab

摘要

The fracture mode of AA 5083 Al–Mg alloy is predominantly intergranular. For this, a three-dimensional Crystal Plasticity Finite Element (CPFE) model is developed to investigate Grain Boundary (GB) fracture behavior under uniaxial tensile loading. Following parameter calibration, the simulated tensile strength demonstrates consistency with experimental data, with a high accuracy of 97%. Furthermore, by integrating CPFE model incorporating the dislocation slips with a GB model, a two-dimensional tri-junction crystal plasticity framework is established, and cohesive elements are implemented within the three grains to simulate GB fracture process under uniaxial tension. This tri-junction model shows a good convergence. The effect of grain orientation, location and GB thickness on GB fracture is investigated. The results reveal that grain orientation and location significantly influences GB fracture behavior. It is found that the Goss-Brass-P orientation combination demonstrates the optimal comprehensive mechanical properties, achieving a strain energy density of 7.09 MJ/m3. Furthermore, there exists a threshold effect about GB thickness on comprehensive property. The optimal performance is obtained when the cohesive that determines GB thickness is set to 2.