|About this Abstract
|2023 TMS Annual Meeting & Exhibition
|Phase Transformations and Microstructural Evolution
|H-18: Microstructure and Deflection Behavior of Diffusion Bonded Fe-Ni-Mo/Invar Bimetallic Strips
|Gin Kyu Lee, JunHee Han, Jae-Yeol Jeon, Dae-Guen Kim, Jae-Young Song, Jin Kyu Lee
|On-Site Speaker (Planned)
|Jin Kyu Lee
Bimetals consist of two or more metallic components with different thermal expansion coefficients that bend when subjected to changes in temperature. Thanks to this property, bimetal strips are widely used in many equipment items such as thermometers, circuit breakers, and home applications for similar purposes.
In this study, we report the microstructure and deflection behavior of Fe-Ni-Mo/Invar bimetallic strips using diffusion bonding after rolling. Microstructure and composition distribution for Fe-Ni-Mo/Invar bimetallic strips treated with diffusion annealing at different temperatures and times was investigated. From this result, the optimal bimetal structure and conditions of diffusion bonding were suggested. The microstructure and phase analyses of the bonding interface are performed by X-ray diffractometry, scanning electron microscopy, and electron backscatter diffraction. The element concentration at various distances from the bonding interface was determined by electron probe micro-analysis. The mechanical properties were performed by measuring Vickers hardness and deflection properties at elevated temperatures.
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