| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
The phase stability of high entropy alloy (HEA) was investigated by High Voltage Electron Microscopy (HVEM) focusing on the occurence of solid state amorphization(SSA). The occurence of SSA was not detected under fast electron irradiation in equiatomic TiNbTaZr with BCC structure, equiatomic TiNbTaZrV with BCC structure and CoCrCuFeNi with FCC structure, and non-equiatomic Al0.3CoCrFeNi with BCC structure. In contrast, non-equiatomic Al0.5TiZrPdCuNi with BCC structure shows the SSA regardless of the initial microstructure (i.e., "coarse crystalline structure" or "nano-crystalline structure with grain boundaries as a sink for point defects"). This result suggests that the Al0.5TiZrPdCuNi HEA from other common alloys and the other HEAs. The SSA behavior in Al0.5TiZrPdCuNi HEA investigated by HVEM indicated that SSA behavior in Al0.5TiZrPdCuNi HEA was similar to that in intermetallic compounds reported to date.
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