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<p>In this work, a self-designed high temperature tensile test apparatus was used to investigate the effect of tensile rate on the mechanical behavior of the Al-Si eutectic alloy liquid film, supplemented by numerical simulations of the tensile process. Numerical simulation results show that deformation of the liquid film occurs as the liquid continuously flows out of the neck region, with flow velocities at the center and edge of the necked region differing during the early stage of tension. Increasing the stretching rate does not change the deformation mechanism of the liquid film but increases the fracture displacement, which is attributed to the enhanced viscous force that stabilizes the film and delays fracture. In contrast, the fracture time of the liquid film decreases markedly, especially when the stretching rate increases from 2 to 5 mm/min, resulting in an average reduction of 58%. When the temperature is below 589&#xa0;°C, a higher stretching rate increases the maximum stress of the liquid film, whereas at 589&#xa0;°C it decreases. Nevertheless, the effect of stretching rate on liquid film strength remains relatively small.</p>

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The Effect of Tensile Rate on the Stress-Strain Characteristics of Intergranular Al-Si Eutectic Alloy Liquid Film

  • 期刊论文

  • 发表日期：

    2026年1月9日

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  • Kaixuan Zhang,
  • Xingchen Shen,
  • Xiaogang Fang,
  • Junchao Yu,
  • Chao Gao,
  • Rui Zhou,
  • Yiqing Chen

摘要

In this work, a self-designed high temperature tensile test apparatus was used to investigate the effect of tensile rate on the mechanical behavior of the Al-Si eutectic alloy liquid film, supplemented by numerical simulations of the tensile process. Numerical simulation results show that deformation of the liquid film occurs as the liquid continuously flows out of the neck region, with flow velocities at the center and edge of the necked region differing during the early stage of tension. Increasing the stretching rate does not change the deformation mechanism of the liquid film but increases the fracture displacement, which is attributed to the enhanced viscous force that stabilizes the film and delays fracture. In contrast, the fracture time of the liquid film decreases markedly, especially when the stretching rate increases from 2 to 5 mm/min, resulting in an average reduction of 58%. When the temperature is below 589 °C, a higher stretching rate increases the maximum stress of the liquid film, whereas at 589 °C it decreases. Nevertheless, the effect of stretching rate on liquid film strength remains relatively small.