|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Refractory Metals 2018
||Microstructure and Mechanical Properties of Cr-Si High-temperature Alloys
||Yuki Aono, Toshihiro Omori, Ryosuke Kainuma
|On-Site Speaker (Planned)
Cr alloys have potential as heat-resistant materials because of the higher melting point and lower density of Cr compared to those of Ni-base superalloys. In the Cr-Si system, the Cr<SUB>3</SUB>Si (A15) phase is equilibrated with the Cr solid solution phase, and it has been reported that addition of Si can improve the oxidation resistance of Cr alloys. However, there are few reports on the mechanical properties of Cr-Si alloys. In this study, the microstructure and mechanical properties of Cr-Si alloys were investigated. Compression tests were conducted in hypoeutectic and eutectic Cr-Si alloys in vacuum environment, and it was found that Cr-13at%Si hypoeutectic alloy show the highest 0.2% proof stress of 526MPa at 1000℃ among the investigated alloys. Its specific strength is 78.1 Nm/g at 1000℃ which is twice as high as that of Ni-based Mar-M247 alloy.
||Planned: Supplemental Proceedings volume