About this Abstract |
Meeting |
Superalloys 2021
|
Symposium
|
Superalloys 2021
|
Presentation Title |
Suppression of Sulfur Segregation at Scale/Substrate Interface for 6th Generation Single Crystal Ni-base Superalloy |
Author(s) |
Kyoko Hashi Kawagishi, Chihiro Tabata, Takuya Sugiyama, Tadaharu Yokokawa, Jun Uzuhashi, Tadakatsu Ohkubo, Yuji Takata, Michinari Yuyama, Shinsuke Suzuki, Hiroshi Harada |
On-Site Speaker (Planned) |
Chihiro Tabata |
Abstract Scope |
It is known that a single-crystal Ni-base superalloy containing a trace amount of sulfur has reduced high-temperature oxidation resistance. Our previous study has shown that melting of Ni-base superalloys in a CaO crucible can eliminate the effect of sulfur on oxidation resistance, but the mechanism was not completely clear. In this study, we finally succeeded in detecting the segregation of sulfur at the oxide / substrate interface of 6th generation single-crystal superalloys using STEM-EDS analysis, and confirmed that segregation could be suppressed by melting in the CaO crucible. As a result, it was found that melting in the CaO crucible can improve the oxidation resistance while maintaining the creep characteristics of 6th generation single-crystal Ni-base superalloy. |
Proceedings Inclusion? |
Undecided |