Effect of temperature field and mechanical properties of casting on prediction of hot tearing tendency using FEM thermal stress analysis+1

Ryosuke Takai, Tatsuya Tsunoda, Yasutaka Kawada, Rei Hirohara, Toshimitsu Okane, Makoto Yoshida

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

It is known that hot tearing tendency increases with the increase in the cooling rate of casting during the solidification. As the direct control factors of the hot tearing, the cooling rate dependences of the temperature field of the casting and the mechanical property of alloys in the semisolid state have been implied. However, quantitative evaluation is not clarified yet to show which parameters is more important to predict hot tearing tendency. In this study, through the thermal stress analysis using cooling rate-dependent temperature fields of casting and cooling rate-dependent creep parameters in the semi-solid state, hot tearing tendency was predicted for an AlMg alloy during the solidification. For the prediction, the maximum principal creep strain accumulated during the solidification was used as the indicator of hot tearing tendencies. Then, the hot tearing tendencies were compared with experimental results. As a result, in the cooling rate range of this study which was corresponding to gravity die casting, it was found that the temperature fields are relatively more critical to predict hot tearing tendency than the creep parameters.

Original languageEnglish
Pages (from-to)1333-1340
Number of pages8
JournalMaterials Transactions
Volume59
Issue number8
DOIs
Publication statusPublished - 2018

Keywords

  • AlMg alloy
  • Constitutive model
  • Cooling rate
  • Hot tearing
  • Thermal stress analysis

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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