About this Abstract |
Meeting |
2nd World Congress on High Entropy Alloys (HEA 2021)
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Symposium
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2nd World Congress on High Entropy Alloys (HEA 2021)
|
Presentation Title |
ON DEMAND: Investigation of Reduced Activation FCC-type High Entropy Alloys for Nuclear Applications |
Author(s) |
Hiroshi Oka, Naoyuki Hashimoto, Shigehito Isobe, Mikito Ueda, Shigenari Hayashi, Shinichiro Yamashita, Mitsuhiro Itakura, Tomohito Tsuru |
On-Site Speaker (Planned) |
Hiroshi Oka |
Abstract Scope |
The interest on high entropy alloys (HEAs) as next generation nuclear energy application is increasing due to its potential of irradiation resistance. For the nuclear application, Co-free HEAs are attractive because Co can be activated by neutron irradiation. Because the formation of planar defects, e.g. frank loops, introduced by irradiation are a main cause of irradiation hardening in FCC alloys, controlling stacking fault energy (SFE) is essential for designing alloys with high radiation tolerance.
In this study, Cr0.8FeMnxNiy HEAs with FCC structure were investigated. The room temperature tensile tests showed that tensile strength depended on the concentrations of Mn and Ni and Cr0.8FeMn1.3Ni1.3 had the highest tensile strength, which was higher than that of conventional 316 stainless steel. The SFE was estimated by measuring the width of extended dislocations using TEM, and it is shown that the SFE increased with increasing the total concentration of Mn and Ni. |
Proceedings Inclusion? |
Undecided |