Observation and solidification simulation of microsegregation in ni-base alloy

Katsunari Oikawa, Hiroyuki Hiraki, Koichi Anzai

Research output: Contribution to journalArticle

Abstract

Solidification structure of an alloy of grade Hastelloy G-2 was investigated by differential scanning calorimetry and electron probe microanalyzer. Small amount of Cr and Mo-enriched phase was observed at the final solidification region. Furthermore, the numerical simulation of solidification behavior of this alloy was conducted using the thermodynamic models such as the Scheil-Guillver model and the Partial Equilibrium model, and the Multi-Phase-Field (MPF) method. The simulation results of the MPF method were in good agreement with the experimental results. And the Cr and Mo-enriched phase formed at the final solidification region was predicted as the σ phase from the results of simulation. The MPF method is valuable tool to investigate the microsegregation and phase transformation during the solidification of the Ni-base alloys.

Original languageEnglish
Pages (from-to)10-16
Number of pages7
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume99
Issue number2
DOIs
Publication statusPublished - 2013 Apr 8

Keywords

  • Kinetics
  • Microsegregation
  • Simulation
  • Solidification
  • Thermodynamics

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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