中文摘要：

采用连续点式锻压激光快速成形技术制备了TA15合金厚壁件，研究了不同退火温度对连续点式锻压激光快速成形TA15合金的显微组织以及室温拉伸力学性能的影响。分析了连续点式锻压塑性变形区大小及所制备TA15合金显微组织的形成机理，解释了退火过程中TA15合金层片组织转变为等轴组织的原因。实验结果表明，随着退火温度的升高，TA15合金退火组织等轴α晶粒体积分数越高，且晶粒尺寸越大，同时退火TA15合金强度降低、塑性升高。

英文摘要：

A thick-wall part of TA15 titanium alloy is formed by the technology of laser rapid forming combined with continuous point forging. The influence of different annealing temperatures on the microstructures and the tensile properties test at room temperature of the TA15 alloy part formed by the technology of laser rapid forming combined with continuous point forging is investigated. The analysis of size of the plastic deformation zone formed by continuous point forging and the microstructure formation mechanism of the as-formed TA15 alloy part is given. The reason that the lamellar microstructure of the as-formed TA15 alloy part transform into the equiaxed microstructure is also explained. The results show that the volume fraction of equiaxed α grain in the annealed structure of TA15 alloy and the size of the equiaxed αgrain increase with annealing temperature increasing. The results also show that the strength of the annealed TA15 alloy reduces, and at the same time its ductility increases with annealing temperature increasing.