多辊轧机冷轧技术在靶材料制备中的应用

 叙述了多辊轧机轧制金属薄膜原理,以Ti膜制备为例,借助多辊轧机冷轧技术进行1.5 μm厚钛薄带的制备工艺研究。对薄膜的特性测试结果表明：工作辊的表面粗糙度对于轧制薄膜的表面粗糙度的影响很大,降低工作辊表面的粗糙度可以得到粗糙度为25.2 nm的金属薄膜。     

Multiscale study of cold-rolling deformation on mechanical and corrosion behaviors of AA2024-T4 aluminum alloy

This study has been conducted to investigate the effects of plastic deformation of an AA2024 aluminium alloy by cold rolling to 25%, 50% and 75% and then heat-treating and naturally ageing for 20 days to T4 on the microstructure and the electrochemical behavior. To characterize the microstructural modifications different techniques have been applied such as X-ray Diffraction (XRD) to demonstrate the intermetallic phases formed, Optical Microscopy (OM) and Scanning Electronic Microscopy (SEM) to evaluate their microstructures and grain size. Moreover, the surface topography has been measured to establish the roughness effect on the mechanical response when subjected to tensile, fatigue and micro-indentation tests. The corrosion behaviour was evaluated by Potentiodynamic Polarization Scanning, Cyclic Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS). The results revealed that cold-rolled samples with 50% plastic deformation show a smoother topography and exhibit the best compromise between mechanical and corrosion resistance.