Liu Min, Huang Liufei, Ren Congcong, Wang Dou, Li Qiang, Li Jinfeng
Xinjiang Key Laboratory of Solid State Physics and Devices, Xinjiang University, Urumqi 830046, China.
School of Physics and Technology, Xinjiang University, Urumqi 830046, China.
Materials (Basel). 2022 Feb 18;15(4):1548. doi: 10.3390/ma15041548.
Titanium for additive manufacturing presents a challenge in the control of costs in the fabrication of products with expanding applications compared with cast titanium. In this study, hydrogenated-dehydrogenated (HDH) titanium powder with a low cost was employed to produce spherical Ti powder using the radiofrequency plasma (RF) technique. The spherical Ti powder was used as the raw material for laser directed energy deposition (LDED) to produce commercially pure titanium (CP-Ti). Microstructural analyses of the powder revealed that RF treatment, not only optimized the shape of the titanium powder, but also benefited in the removal of the residual hydride phase of the powder. Furthermore, the LDED-HDH-RF-produced samples showed an excellent combination of tensile strength and tensile ductility compared to the cast and the LDED-HDH-produced samples. Such an enhancement in the mechanical properties was attributed to the refinement of the α grain size and the dense microstructure. The present work provides an approach for LDED-produced CP-Ti to address the economic and mechanical properties of the materials, while also providing insights into the expanding application of HDH titanium powder.
与铸造钛相比，用于增材制造的钛在制造应用不断扩大的产品时面临成本控制方面的挑战。在本研究中，采用低成本的氢化-脱氢（HDH）钛粉，利用射频等离子体（RF）技术制备球形钛粉。将球形钛粉用作激光定向能量沉积（LDED）的原料来生产工业纯钛（CP-Ti）。对粉末的微观结构分析表明，射频处理不仅优化了钛粉的形状，而且有利于去除粉末中的残余氢化物相。此外，与铸造样品和LDED-HDH制备的样品相比，LDED-HDH-RF制备的样品在拉伸强度和拉伸延展性方面表现出优异的组合。这种机械性能的提高归因于α晶粒尺寸的细化和致密的微观结构。本工作为LDED制备CP-Ti提供了一种解决材料经济性和机械性能问题的方法，同时也为HDH钛粉不断扩大的应用提供了见解。
