2021 Fiscal Year Final Research Report
Modelling of sintering behavior of different metal powder mixtures and extension of hybrid analytical method for sintering deformation and microstructural evolution
| Project/Area Number |
19H02480
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 26050:Material processing and microstructure control-related
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
工藤 健太郎 九州大学, 工学研究院, 助教 (60757235)
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 焼結 / フェーズフィールド法 / 個別要素法 |
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| Outline of Final Research Achievements |
A method for simulating the interdiffusion between different elements and the liquid formation during sintering is proposed for blended elemental powder processing of a binary eutectic alloy. The diffusion of elements and the phase transformation is computed by a multi-phase-field method (MPFM), and the sintering shrinkage is calculated by the discrete-element method (DEM). MPFM for microstructural evolution in sintering is formulated with taking account of the conservation law of gas phase fraction. In the model of MPFM, the way of evaluating the neck size is established even if the liquid phase is formed in the contact area between particles, and the sintering force obtained from the neck size is incorporated in DEM calculation.
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| Free Research Field |
工学
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| Academic Significance and Societal Importance of the Research Achievements |
粉末冶金で合金部品を製作する方法として，低コスト，低成形荷重を達成するために，元素粉末を混合して焼結する方法が開発されてきた．これにより強度，靭性をもたらすヘテロ構造を作製することもできる．しかし，ヘテロ構造の形成は，プロセス条件の他，元素粉末のサイズ，量，分布に影響され，最適な機械的性質を得るためにはそれらを制御しなければならない．本解析手法は粉末冶金法におけるプロセス設計，材料設計に貢献すると考えらえれる．
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