Viscosity properties prediction of semi-solid aluminum alloys using finite element analysis based on quenched solidified structure, and experimental validation

Naofumi Takatori, Mami Amano, Ryousuke Miyachi, Yoshihiro Nagata, Muhammad Khairi Faiz, Makoto Yoshida

Research output: Contribution to journalArticlepeer-review

Abstract

For predicting hot tearing during casting process, viscosity properties and constitutive equations in the semi-solid region are required. In this research, viscosity properties of two alloys, which are Al-5mass%Mg alloy with Ti-B grain-refiner and Al-2mass%Cu alloy with Ti-B grain-refiner, are estimated using the image-based modelling method as suggested by Matsushita et al. As to the mechanical properties of the solid phase in semi-solid region, it is found that by using the temperature dependent value rather than the value just below the solidus temperature, the prediction accuracy of the viscosity value in semi-solid region has increased. By comparing the obtained numerical properties with the experimental properties, it is found that the method can predict the viscosity properties of Al-5mass%Mg alloy and Al-2mass%Cu alloy in the semi-solid region at the solid fraction where hot tears are likely to occur.

Original languageEnglish
Pages (from-to)187-193
Number of pages7
JournalKeikinzoku/Journal of Japan Institute of Light Metals
Volume70
Issue number5
DOIs
Publication statusPublished - 2020 May 15

Keywords

  • Aluminum alloy
  • Hot tearing
  • Semi-solid
  • Viscosity

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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