Annealed pure copper strips were taken as raw materials, and after the processes of foil rolling, the rolled copper foils were fabricated. The effect of foil rolling reduction on microstructure, texture and bending property of the rolled copper foils was studied. The results show that the cross-sectional microstructure of the rolled copper foil consists of elongated grains and the adjacent grain boundaries spacing gradually decreases with the increase of the rolling reduction. When the reduction reaches 90.7%, the adjacent grain boundaries spacing is only 0.52 μm. Rolling textures of the rolled copper foils mainly consist of C, S and B orientation components. With the increase of reduction, the whole intensity of rolling texture increased, and the orientation concentrated continuously. The rolled copper foil with reduction of 90.7% has the best bending resistance, whose fatigue life is more than 300 times. The basic reason for the enhancement in bending performance of copper foils may be that a great foil rolling reduction makes their grains much thinner and their texture highly intensified.

In order to understand the effect of thermo hydrogen treatment (THT) on high temperature tensile behavior of a Ti₂AlNb based alloy plate, high temperature tensile tests of Ti-22Al-25Nb alloy plates without and with 0.2%H (mass fraction) charging were conducted with strain rate of 2.5×10^-2 s^-1 at 870, 900, 930 and 990℃respectively. It was found that 0.2%H charging could reduce the high temperature flow stress and enhance the tensile elongation. When deformed at 930℃, the peak stress of the hydrogen charged Ti-22Al-25Nb alloy decreased by approximately 36%, and the elongation increased by approximately 53% in comparison with the bare alloy. Hydrogen-induced softening and plasticity might mainly be attributed to the hydrogen promoted the dynamic recrystallization of α₂ phase, the dislocation movement and the dynamic recovery of b/B2 phase as well as increased the amount of b/B2 phase.

Ni coatings were prepared by a novel flexible friction assisted electroplating technology from an additive-free Watts bath at different relative moving speed. The morphology, microstructure, residual stress and microhardness of deposits were characterized by SEM, AFM, XRD, TEM, X-ray stress tester and microhardness tester, respectively. The results show that relative moving speed has important effect on the microstructure of Ni coating. At a relative moving speed range of 4.8-14.4 m/min, electrodeposited Ni coatings have face center cubic crystallography structure with a strong preferred orientation of (311). With the increase of the relative moving speed, the needle-like Ni crystallites gradually becomes uniformity, fine and compact on the surface of coatings; Tensile stress of the coatings firstly decrease then increase, but the microhardness gradually increase from 406 HV to 471 HV. When the relative moving speed achieves 12 m/min, the electrodeposited Ni coating shows much higher microhardness of 460 HV, a lowest tensile stress of about 100 MPa, and the average grain size of about 100 nm.

A low carbon steel was firstly annealed with an ultra-rapid heating rate of 200℃/s at 660℃ and 750℃ respectively, then the steel was pre-strained to 2% and finally suffered a baking hardening treatment at 180℃ for 20 min in order to reveal the synergistic effect of the above two heat treatments of the performance of the low carbon steel in terms of heating temperature, soaking time and cooling rate etc. Results indicated that the bake hardening was enhanced with the increase in annealing temperature for the dissolution of the carbides. The BH value of the low carbon steel annealed at 660℃ decreased significantly with increasing soaking time. But the BH value showed a complex variation with soaking time for the steel annealed at 750℃ because the carbides dissolved incompletely during the ultra-rapid heating process: with an increase in soaking time in the range of 0 to 10 s, the BH value made an apparent increment, and then decreased obviously when the soaking time exceeded 10 s. The bake hardening of the steel is enhanced significantly with increasing cooling rate due to the increment of the solute carbon.

Monotectic Al-Pb alloy melts were continuously solidified in a static magnetic field. Samples with well dispersed microstructure were obtained. The average size of the Pb-rich particles decreases with the increase of the magnetic field intensity. Theoretical analyses demonstrate that a static magnetic field causes an increase of the effective viscosity of the melts, and a decrease of the moving velocity of droplets of the precipitated phase and the convective flow of the matrix melt, therefore promotes the formation of the well dispersed solidification microstructure.

The 6.5 mm thick plate of a multiphase steel (0.23C-1.9Mn-1.6Si%) composed of intercritical ferrite, martensite and well-distributed retained austenite was obtained by an optimized IQ&P process. Tensile strength of this kind of multiphase steel is higher than 1000MPa. Microstructure of the steel was characterized by means of SEM and XRD, and its mechanical properties were measured by the tensile and instrumented Charpy impact testing at room temperature. In comparison with the IQ&T steel and Q&T steel, which have the same tensile strength, the IQ&P steel shows much better comprehensive mechanical properties with higher toughness, better elongation and bigger products of tensile strength and total elongation. The reason for this is mainly the multi-phase microstructure of the IQ&P steel. TRIP effect of the retained austenite which occurs during the deformation process can significantly improve the toughness and plasticity of the IQ&P steel, and thus contributed to the improvement of mechanical properties.

Based on the reflection property of water-superhydrophobic material interface, the underwater wetting behavior of natural lotus leaf and superhydrophobic ZnO arrays was investigated by varying the wetting status with vacuum pumping and pressure-driven with special attention on the influence of the entrapped air in microstructures of their surface. The results show that when air was trapped on the surface, the water-superhydrophobic material interface exhibits different wetting reversibility in the course of compressing and decompressing, which may be affected by the maximum pressure exerted and the morphology of the surface microstructure. The entrapped air in the surface microstructures can delay the intrusion of water and enhance the stability of superhydrophobicity. In certain case, with the decrease of external pressure the expansion of the trapped air can even push out the intruded water and lead to the de-wetting process, therewith benefitial to the stability of superhydrophobic state. Due to the difference in density of trip-phase contact line, the microstructure in nano-scale show better hydrophobic stability rather than that of the microstructures in micro-scale under external pressure.

Native corn starch (NCS) was acetylated by a microwave-assisted method using vinyl acetate (VAc) as an acetylating agent and potassium carbonate K₂CO₃ as a catalyst. Acetylated corn starch (ACS) was characterized by Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The physicochemical properties, adhesive properties and biodegradability of ACS were systematically investigated. The results show that the physicochemical properties of ACS were improved compared with NCS: the hydration capacity raised, solubility, swelling power and paste clarity increased; the intrinsic viscosity, apparent viscosity decreased, rheological property were improved; the syneresis decreased, anti-retrogradation were enhanced. The adhesion to polyester/cotton fibers of ACS was enhanced, which compensated for the insufficient adhesion to hydrophobic fibers of native starch. BOD₅/COD_cr value of ACS was outclasses that of PVA-205.

Ni/TiO₂ nanocomposite was prepared by mechano-chemical synthesis. The as-milled nanocomposite consists of hexagonal-structure rutile TiO₂ and face-centered cubic structure Ni. Annealing treatment decreases both the lattice defects and the internal stress, while remarkably increases the grain size of metal Ni and the saturation magnetization. After annealing treatment the intrinsic emission, free exciton emission and bound exciton emission peaks of TiO₂ exhibit a red shift, for which the reason may be the distortion of the band structure. For the as-milled nanocomposite an intense nonlinear dielectric resonance occurs at 15 GHz and a clear Cole-Cole semicircle was observed. Meanwhile, a reflection loss (RL) exceeding -10 dB in a frequency range of 14-16 GHz and a maximum value of RL as large as -32 dB are obtained for an 8 mm thick absorber. After annealing treatment the intensity of the natural resonances at 2.8 and 5.2 GHz has been significantly strengthened, leading to a remarkable improvement of microwave-absorption properties in the frequency range 2-6 GHz.

A novel halogen–free composite of intumescent flam retardant (IFR)-/ low-density polyethylene (LDPE) was prepared by melt blending LDPE and IFR,, the later consisted of 1, 3, 5-tri (5, 5-dibromomethyl-1, 3-dioxaphosphorinanyl-2-oxy) benzene(FR)and polyphosphate (APP ). The flame retardancy of IFR/LDPE composite was examined by using oxygen index meter. The influence of IFR on the non-isothermal crystallization kinetics of LDPE was investigated by differential scanning calorimeter. The crystallization characteristics of the composite were analyzed by methods of Jeziorny, Ozawa and Mo Zhi-shen. The activation energy of the LDPE and IFR/LDPE were calculated by the Kissinger and Takhor methods. The results show that the limited oxygen index value of IFR/LDPE could reach 31.7% and the total crystallization rate of IFR/LDPE decreased with the addition of 25 %(mass fraction)IFR. Therefore, the addition of IFR might bring a negative effect on the crystallization process of LDPE.

The bending stress and strain of bimetal plate during roller leveling process are studied by means of both numerical analysis and experimental verification. The results show that the calculated results are agreed fairly well with the measured data. There is a deviation between the positions of the neutral layer of strain and the geometric middle of the plate thickness. At the same time this deviation changes with the ratio of the thickness of the two metallic materials, as well as the bending degree of bimetal plate. Furthermore, the percentage of the plastic layer for each of the two metallic materials in one bent unit is different owing to the difference of their mechanical property, while the roller leveling induced residual stress decreases with the increasing number of bent units.

Large-sized TiAl/Ti₃Al micro-laminated composite thin sheet with thickness of 0.1-10 mm was prepared by high-powerful electron beam physical vapor deposition technology in laboratory. The composition and microstructure of TiAl/Ti₃Al were chacterized by XRD and SEM. The results indicated that the prepared material with visible lamellar structure was alternately composed of α₂-Ti₃Al and γ-TiAl phase and the mean grain size of TiAl was about 1-2 µm. The degradation process was also investigated by high temperature annealing at various temperatures for 3 h.