Development of microstructure and mechanical properties of a Ni-base single-crystal superalloy by hot-isostatic pressing |
| |
Authors: | Jung-Chel Chang Cheol Choi Jae-Chul Kim Young-Hoon Yun |
| |
Affiliation: | (1) KEPRI, Power Generation Laboratory, 103-16 Munji-dong, Yusung-ku, 305-380 Daejon, Korea;(2) Department of Ceramic Engineering, Hanyang University, 133-791 Seoul, Korea |
| |
Abstract: | Effects of the hot-isostatic pressing (HIP) process on microstructures and mechanical properties of Ni-base single crystal
superalloy CMSX-4 were investigated. In the overall heat treatment process, the HIP treatment remarkably induced the healing
behavior of micropores and decreased the pore size and porosity of superalloy CMSX-4 compared with normally treated specimens.
The microstructure of γ′ phase after the HIP process showed rather a coarsening tendency and could be developed by the partially solution and aging
treatment. Consequently, the elimination of cast micropores using the HIP step resulted in the inhibition of crack initiation
in microstructure and improved the stress-rupture lives of Ni-base single crystal superalloy by 185%. |
| |
Keywords: | CMSX-4 healing behavior HIP treatment micropores single-crystal superalloy |
本文献已被 SpringerLink 等数据库收录! |
|