增材制造钛合金微观组织及性能研究进展

Microstructure and Properties of Ti6Al4V Alloy Fabricated with Additive Manufacturing

随着增材制造技术的不断进步,增材制造能够快速成型精密复杂的结构部件。为了使增材制造Ti6Al4V合金能够更好地被应用,国内外学者研究了基板预热、激光功率、扫描速率以及后续的处理等多种因素对于增材制造Ti6Al4V合金微观组织和力学性能的影响,发现选择适当的工艺参数及后处理能够提高其综合力学性能。目前,增材制造钛合金在微观结构上还存在一定的缺陷,结构件内的微小气孔以及未融化颗粒等因素阻碍着其力学性能的提高。未来在解决组织缺陷的同时,增材制造钛合金构件的应用也将是今后研究工作方向之一。

The continuous development of additive manufacturing technology enables rapid prototyping of complex structural components.To make the additive manufacturing Ti6Al4V alloy better applied,the effects of substrate preheating,laser power,scanning rate and subsequent processing on the microstructure and mechanical properties of Ti6Al4V alloy were studied by domestic and foreign scholars.It was found that the selection of appropriate process parameters and post-treatment can improve the comprehensive mechanical properties.At present,the microstructure of titanium alloy has certain defects,the micropores and unmelted particles in the components hinder the improvement of mechanical properties.In the future,while solving microstructure defects,the application of additive manufacturing titanium alloys components will be one of the future research directions.