Cotton fabric was exposed to an atmospheric pressure glow discharge (APGD) ignited by high voltage and helium. Ultrasonic atomization of an aqueous sericin solution injected as an aerosol into the APGD zone gave rise to the rapid deposition of a functionalized plasma polymer film. Sericin coating onto the cotton surface was confirmed by scanning electron microscopy, and the chemical composition was analyzed by Fourier transform infrared spectrophotometry and X-ray photoelectron spectroscopy. It was found that the plasma power could affect the chemistry of the coating. The treated fabrics were tested for UV resistance, crease recovery angle, and water uptake. Results showed that these properties had been improved.
As-cast AZ31 magnesium alloy subjected to multi-pass large strain rolling was investigated. A successive rolling process up to three passes was carried out at 370°C with a pass reduction of 30%. Deformation microstructure characteristics prove that the dynamic recrystallisation (DRX) mode changed with the increase of rolling passes. In the first pass, DRX related to twinning played a dominant role. But in the third pass, DRX grains mainly appeared around the pre-existing grain boundaries. The ultimate strength and elongation of rolled sheets after three passes rolling are enhanced by 37 and 39%, respectively, compared to the as-cast alloy. Meanwhile, the tensile fracture mode was ductile fracture which was different from the ductile–brittle fracture of as-cast.
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