| About this Abstract |
| Meeting |
Additive Manufacturing Benchmarks 2022 (AM-Bench 2022)
|
| Symposium
|
Additive Manufacturing Benchmarks 2022 (AM-Bench 2022)
|
| Presentation Title |
(On Demand) Investigation of Co-free High Entropy Alloys Produced by Selective Laser Melting for Nuclear Applications |
| Author(s) |
Hiroshi Oka, Naoyuki Hashimoto, Shigehito Isobe, Shinichiro Yamashita |
| On-Site Speaker (Planned) |
Hiroshi Oka |
| Abstract Scope |
Additive manufacturing is considered for application to advanced reactors because of its potential to enable new reactor designs. On the other hand, high entropy alloys (HEAs) are being studied as nuclear reactor materials because they show unique diffusion behavior and are expected to suppress the formation of irradiation defects under neutron-irradiated environments. In this study, FCC-type Co-free HEAs (Cr0.8FeMn1.3Ni1.3Alx HEAs) were built by Selected Laser Melting with varying process parameters, and the mechanical property and microstructure were investigated. As a result of the trial manufacture of build pieces with 48 process patterns, the specimen with a defect density of less than 0.02% was obtained. Room temperature tensile test exhibited 40% higher tensile strength compared to reference arc-melted specimen, which is due to the dislocation cell structure in as-built condition. Strength anisotropy was observed along build direction, but it can be reduced by post-build recrystallization heat treatment at 1150°C for 1.5h. |
| Proceedings Inclusion? |
Undecided |