This study focused on the effect of laser power on the macro-morphology, microstructure, bonding interface, and mechanical properties of 20 wt. % TiCp/Ti6Al4V titanium matrix composites (TMC). The unmelted TiC (UMT) gradually decreased, whereas the developed dendritic primary TiC and granular primary TiC increased by increasing the laser power. Laser power had no obvious effect on the texture of α-Ti, and α-Ti grains tended to be refined. The high laser power facilitated the melting of TiCp, thus, the maximum thickness of the C diffusion layer of UMT processed with 600 W was 6.1 μm. More interestingly, when low/high power deposition, some primary TiC and α-Ti had a specific orientation relationship, and high laser power was more conducive to the heterogeneous nucleation of Ti phase. The microhardness increased slowly, and TMC had higher tensile properties when the laser power varied in the range of 400-500 W.

本研究的重点是激光功率对 20 wt. 合金的宏观形貌、微观结构、键合界面和机械性能的影响。% TiCp/Ti6Al4V 钛基复合材料 (TMC)。随着激光功率的增加，未熔化的 TiC（UMT）逐渐减少，而发达的枝晶初生 TiC 和粒状初生 TiC 增加。激光功率对α-Ti的织构无明显影响，α-Ti晶粒趋于细化。高激光功率促进了 TiCp 的熔化，因此，600 W 处理的 UMT 的 C 扩散层的最大厚度为 6.1 μm。更有趣的是，当低/高功率沉积时，一些初级 TiC 和 α-Ti 具有特定的取向关系，高激光功率更有利于 Ti 相的异质成核。显微硬度增加缓慢，