Three-dimensional cellular automaton simulation of coupled hydrogen porosity and microstructure during solidification of ternary aluminum alloys

This study provided useful insights into the new models which govern the pore formation and its interaction with evolving grain structure

Cheng Gu


Scholarcy highlights

  • Aluminum alloys are widely used in automobile, aerospace, and other industrial applications
  • In order to improve the mechanical properties of final products, many researchers have experimented on the gas porosity and hydrogen diffusion during casting and welding processes of aluminum alloys
  • Li and Chang described an analytical solution for nucleation and growth of hydrogen pores during solidification of A356 alloy
  • Jie et al. adopted a mathematical model on the microporosity of aluminum castings, incorporating the pressure increase induced by dissolved hydrogen, solidification shrinkage and interface energy
  • It is necessary and critical to predict porosity coupled with dendrite growth of multi-component alloys in an integrated computational materials engineering11–13 framework to obtain location-specific microstructure models for location-specific mechanical property predictions
  • A 3-D cellular automaton model was built to simulate the formation and evolution of hydrogen porosity coupled with grain growth during solidification process of Al-7wt.%Si-0.3wt.%Mg ternary alloy
  • The effect of cooling rate and initial hydrogen concentration on the porosity size and morphology can be evaluated

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