|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Materials and Fuels for the Current and Advanced Nuclear Reactors V
||Solid-state Diffusion Bonding of Ni-base Hastelloy-X
||Injin Sah, Chan Soo Kim, Yong-Wan Kim, Eung-Seon Kim, Min-Hwan Kim
|On-Site Speaker (Planned)
Hastelloy-X (Ni-21.46Cr-18.96Fe-8.66Mo-1.11Co-0.45W) is considered for a structural material of a process heat exchanger (PHE) in a very high temperature gas-cooled reactor (VHTR). A micro-channel type heat exchanger design, joined by solid-state diffusion bonding, is likely to be applied for the PHE. Diffusion bonding of the alloy is carried out under a compressive pressure of 14 MPa with the temperature varying from 1100 to 1200 oC in 50 oC steps. Mechanical testing and metallographic examinations are employed to evaluate the joint quality of the diffusion bonding. Through the tensile testing performed at up to 900 oC, the tensile strength and ductility of the diffusion-bonded is comparable to those of the as-received alloy when the bonding temperature is 1200 oC. Metallographic characteristics, such as identification of the precipitates along the bond-line and grain boundary migration, are in progress to reveal the influence of temperature on the joint quality.
||Planned: A print-only volume