2020 Fiscal Year Annual Research Report
Stabilizing gamma prime phase using Suzuki segregation to enhance the creep resistance of Co-Ni-based superalloy
| Project/Area Number |
19K23566
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| Research Institution | Tohoku University |
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Principal Investigator |
卞 華康 東北大学, 金属材料研究所, 助教 (30796230)
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| Project Period (FY) |
2019-08-30 – 2021-03-31
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| Keywords | Co-Ni-based Superalloy / Creep / Re addtition |
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| Outline of Annual Research Achievements |
The addition of 1,2,and 3wt% Re into Co-Ni superalloy was conducted. Tensile tests were conducted at room temperature (RT) and 700 degree centigrade. At RT after addition of 1 wt% Re, the tensile strength is same with that of no Re alloy while the elongation increased to 12% from 6%. After addition of 2 wt% Re, tensile elongation further increased to 23%. However, when the content of Re reached 3 wt%, the tensile strength decreased even-though the tensile elongation is still 20%. Moreover, at high temperature the similar effect caused by Re is also observed. Tensile elongation reached to 15% from 3% after addition of 2 wt% Re. The microstructure shows that after Re addition the grain boundary is enhanced. This indicated that the creep resistance could also be improved by addition of Re.
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Research Products
(4 results)
