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Evolutions of microstructure and mechanical properties of copper/SS304 by Mengyuan Ren, Haibo Xie et al

Manufacturing metallic micro channels is a critical issue in micro-electromechanical systems (MEMS), such as micro reactors, micro heat exchangers, micro heat sinks, and fuel cell bipolar plates. An ultra-thin metal foil rolling for the fabrication of micro composite channels was proposed in this study, which is able to improve product functions and reduce operational costs. Copper/SS304L composite foils after annealing at 900 °C were used to form micro channels under different rolling reductions (29.1%, 43.8% and 50.0%), in which the thickness of copper and SS304L are 0.3 mm and 0.1 mm, respectively. Accordingly, the microstructure evolution, material deformation behaviours and mechanical properties of the samples after micro rolling were investigated. From the characterisation of the micro channel region on the copper side, a double fibre texture is produced parallel to the rolling reduction, including a relatively strong <111> fibre and a weak <100> fibre. Moreover, a r

Micro rolling fabrication of copper/SS304L micro composite channels by Mengyuan Ren, Fei Lin et al

Fabrication of micro channels is an important aspect in the development of microfluidic devices, such as microreactors, micro heat exchangers, micro heat sinks and fuel cell bipolar plates. An ultra-thin metal foil rolling for the fabrication of micro composite channels was first proposed in this study, which is able to improve product function and reduce operational cost. Copper/SS304L composite foils with the thickness of 0.3 mm for copper and 0.1 mm for SS304L after annealing at 900 °C were used to form micro channels under different rolling reductions (0.10–0.25 mm) and velocities (7.07–35.35 mm/s), and the processing characteristics, material deformation behaviours and processing mechanisms of the rolling process were investigated. The results show that the ridges and channels are asymmetrical in all samples, while the ridges become more round with the increase of rolling reduction and the decrease of rolling velocity. For the samples with different rolling reductions, the di

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