2023 Fiscal Year Research-status Report
Improvement of tensile and fatigue properties in CoCrFeNi type high-entropy alloys by high-density pulsed electric current
| Project/Area Number |
23K13218
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| Research Institution | Nagoya University |
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Principal Investigator |
尹 盛文 名古屋大学, 工学研究科, 特任助教 (70965160)
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| Project Period (FY) |
2023-04-01 – 2025-03-31
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| Keywords | High Entropy Alloy / CoCrFeMnNi / SPS / Sintering / Compression / Fatigue / Molecular dynamics / Dislocation |
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| Outline of Annual Research Achievements |
In order to clarify the optimized state between the fabrication condition by spark plasma sintering and mechanical properties of the sintered CoCrFeMnNi high entropy alloy, the compressive testing for determining strength and fatigue properties was performed based on a series of sintering conditions. In the simulation, variations in temperature range and pressure level are set by giving parameters within the range selected by prior investigation of experimental works. Microstructural evolution under compressive deformation was also examined. Dislocation and phase analysis were performed by molecular dynamics simulation. This study contributes to understanding the compressive strength and fatigue characteristics based on the sintered state of CoCrFeMnNi high entropy alloy.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
The optimization process for the sintered state and the compression fatigue test were completed. The result met the original target value and simulation is being conducted for quantitative evaluation of the result.
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| Strategy for Future Research Activity |
The deformation mechanism due to temperature conditions and tensile/compressive speed conditions will be investigated. A multiscale simulation will be performed by conducting finite element and molecular dynamics simulations, and the future results wiil be compared and analyzed with experimental views.
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| Causes of Carryover |
Not available
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