Prediction and experimental validation of cooling rate dependence of viscoplastic properties in a partially solidified state of Al-5mass%Mg alloy

Rei Hirohara, Yasutaka Kawada, Ryosuke Takai, Mitsuhiro Otaki, Toshimitsu Okane, Makoto Yoshida

Research output: Contribution to journalArticlepeer-review

Abstract

To predict hot tearing in direct chill (DC) casting and shape casting of aluminum alloys using thermal stress analysis, cooling rate dependence of viscoplastic properties in a partially solidified state is indispensable. Based on viscoplastic properties determined from experiments, this study develops a method to predict the temperature dependence of viscoplastic properties at an arbitrary cooling rate through the Clyne-Kurz microsegregation model. For validation of the developed method, tensile tests were performed on Al-5 mass%Mg alloy in a partially solidified state at three cooling rates. Results show good agreement between the predicted values and experimentally obtained values, which demonstrates that the developed method is effective for predicting the cooling rate dependence of viscoplastic properties.

Original languageEnglish
Pages (from-to)214-221
Number of pages8
JournalKeikinzoku/Journal of Japan Institute of Light Metals
Volume67
Issue number6
DOIs
Publication statusPublished - 2017

Keywords

  • Constitutive behavior
  • Hot tearing
  • Microsegregation
  • Semi-solid
  • Viscoplasticity

ASJC Scopus subject areas

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

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