Numerical methods for controlling shape, size and microstructure of sintered compacts

研究成果: ジャーナルへの寄稿学術誌査読

1 被引用数 (Scopus)

抄録

Predictions of the shrinkage behavior and the microstructural evolution of powder compacts during sintering are important to control the shape, size, and properties of sintered parts. Three kinds of numerical methods for simulating the sintering process at particle level are reviewed, and their characteristics are compared. First, a repeated unit cell model used in the finite element analysis for sintering is introduced. By analyzing the diffusional creep due to the surface tension, various kinds of information about powder particles such as the distributions of stresses and strain rates can be obtained. Secondly, phase-field modeling of microstructural evaluation in sintering process is presented for mesoscale simulation. Anisotropic abnormal grain growth at the later stage of sintering is demonstrated by considering the change in interfacial energy and mobility. Phase-field simulation of grain growth behavior in polycrystalline powder is also conducted. However, it is difficult to compute the sintering shrinkage in the phase-field approach by itself. Finally, a combined phase-field/discrete-element method is proposed to treat both grain boundary migration and sintering shrinkage, as a useful tool for mesoscale simulation.

本文言語英語
ページ(範囲)3-9
ページ数7
ジャーナルFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
63
1
DOI
出版ステータス出版済み - 1月 2016
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 機械工学
  • 産業および生産工学
  • 金属および合金
  • 材料化学

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