3D打印钛合金内部孔洞的研究进展

Research Progress on 3D Printing Internal Cavity of Titanium Alloy

Ti6Al4V具有良好的生物相容性以及优异的力学性能,是一种理想的生物医用材料。而3D打印技术是一种革命性的制造技术,能够个性化定制生物医用材料。近年来使用3D打印技术制备钛合金植入物已成为组织工程学研究的热点之一。但3D打印技术制备的Ti6Al4V内部存在大量随机分布的球形孔洞,阻碍了3D打印钛合金的广泛使用。系统总结了激光选区熔化和电子束熔融沉积两种方式制备的钛合金内部孔洞的形成机制,重点分析了高能束能量密度和扫描策略等因素对孔洞的影响,揭示了内部孔洞对打印件拉伸与疲劳性能的作用规律。

Ti6Al4V is an ideal biomedical material with good biocompatibility and excellent mechanical properties,and 3D printing technology is a revolutionary manufacturing technology that can personalized biomedical materials.Therefore,the use of 3D printing technology to prepare Ti6Al4V implants has become one of the hotspots in tissue engineering research in recent years.However,there are a large number of randomly distributed spherical cavities inside Ti6Al4V prepared by 3D printing technology,which hinders the wide use of 3D printed titanium alloy.The formation mechanism of internal cavities of titanium alloy prepared by selective laser melting and electron beam melting deposition is summarized.The effects of high energy beam energy density and scanning strategy on the cavities are analyzed,and the effect of internal cavities on the tensile and fatigue properties of the printed parts is revealed.