废旧线路板回收处理过程中得到的塑料粉料作为增强填料，采用模压成型的方法制备成复合材料，改变填料形状、加入量及大小，研究其对复合材料性能的影响。结果表明，用废弃粉体与短切玻璃纤维作为组合增强体，制得的不饱和聚酯复合材料的力学性能远大于单种增强体的力学性能；颗粒大小为1-3mm的纤维状填料对复合材料性能的提高远远大于颗粒大小为65目对复合材料性能的提高，且填充量也较大，质量含量可达65%，弯曲强度和冲击强度可达150MPa、18kJ/m2。

Laser surface remelting followed by heat treatments at 1000°C for different time was carried out on γ-TiAl based alloy. The characteristics of structural transformation of laser surface remelted γ-TiAl based alloy were investigated by high-temperature microscope, TEM and XRD. The results show that the phase transformation (α2 → γ) in TiAl alloy occurred at the earlier stage of post-heat treatment, and the dendritic structure transformed firstly at the intergranular, then expanded into the transgranular, finally changed to ultrafine equiaxed grain structure, at the same time, micro-hardness of laser-surface remelted γ-TiAl based alloy had the corresponding change with the structural transformation.

γ-TiAl alloy was bonded to Ni-base casting alloy using a laser surface modification technique, and the effects of Ni–Cr–Ti–Al clad coatings on TiAl alloy/Ni-base alloy bonds were investigated. Interfacial defects in joints were restricted by Ni–Cr–Ti–Al clad coatings. The compositions and microstructures of Ni–Cr–Ti–Al clad coatings have significant effects on the thickness and shape of interfacial reaction layers, and sound joints with the high shear strength are achieved between laser-surface-remelted TiAl alloy and Ni-base alloy laser clad with a Ni56Cr7Ti15Al22 coating.

By using the real information of the intended bonding surface and considering the effect of the diffusion distance in a definite time, a new theoretical model for diffusion bonding was proposed. The effects of different operating mechanisms, bonding parameters and microstructures on bonding were investigated. The simulation results indicate that, it is vital to consider the real information of the intended bonding surfaces and the effect of diffusion distance in a definite time; the metastable microstructure and the stable ultrafine microstructure exhibit better bonding characteristic than that of the original stable microstructure, which is in agreement with experimental results.

Using the combination of thermal simulation test and statistical method, the effects of microstructure variation on dynamic compressive deformation behavior were investigated with a Ti–3Al–5Mo–5V alloy systemically, under the strain rate of 16.67 s−1 at room temperature. The microstructure characteristics, such as the length, width and the aspect ratio (length/width) of α platelet, changes regularly with the increase of temperature or holding time. The aspect ratio and the size of α platelet affect the width of deformed shear band forming during the dynamic compressive deformation. Micro defects could be found when the width of deformed shear band decreases to a certain extent.