This paper presents the results of fatigue tests conducted on Ti6Al4V titanium alloy with diamond structure obtained by the Laser Power Bed Fusion method. Samples used in tests were printed with porosities: 81%, 73%, 50%, 34% and near-zero porosity. Samples were subjected to cyclic tests with a constant stress amplitude. The number of cycles until sample failure was registered. Obtained fatigue test results made it possible to determine simple, semi-empirical dependencies making it possible to forecast the fatigue life of Ti6Al4V titanium alloy with diamond structure obtained by the Laser Power Bed Fusion method under conditions of uniaxial, cyclically variable loads. The experimental results revealed that the initiation of the macro-crack occurred already with a small number of cycles. This was caused by the presence of two types of notches: technological micro-notches between particles of melted powder and notches related to the shape of the diamond structure itself. Microscopic observations of the fatigue fractures of samples were carried out, both on those subjected to low-cycle tests and those subjected to high-cycle tests. This made it possible to identify crack initiation and damage accumulation mechanisms as well as to propose numerical dependencies for samples of the tested structure. For this purpose, it is necessary to determine only the tensile strength of the given metamaterial and the fatigue characteristic for the given porosity.

本文介绍了采用激光功率床融合法获得的具有金刚石结构的 Ti6Al4V 钛合金的疲劳试验结果。测试中使用的样品印有孔隙率：81%、73%、50%、34% 和接近零的孔隙率。样品经受具有恒定应力幅值的循环测试。记录样本失败前的循环数。获得的疲劳测试结果可以确定简单的半经验相关性，从而可以预测通过激光功率床融合方法获得的具有金刚石结构的 Ti6Al4V 钛合金在单轴循环可变载荷条件下的疲劳寿命。实验结果表明，宏观裂纹的萌生已经在少量循环中发生。这是由于存在两种类型的缺口造成的：熔化粉末颗粒之间的技术微缺口和与金刚石结构本身的形状相关的缺口。对经受低循环试验和经受高循环试验的样品进行了疲劳断裂的显微观察。这使得识别裂纹萌生和损伤累积机制以及提出测试结构样本的数值依赖性成为可能。为此，只需要确定给定超材料的抗拉强度和给定孔隙率的疲劳特性。对那些经受低循环测试和那些经受高循环测试的测试。这使得识别裂纹萌生和损伤累积机制以及提出测试结构样本的数值依赖性成为可能。为此，只需要确定给定超材料的抗拉强度和给定孔隙率的疲劳特性。对那些经受低循环测试和那些经受高循环测试的测试。这使得识别裂纹萌生和损伤累积机制以及提出测试结构样本的数值依赖性成为可能。为此，只需要确定给定超材料的抗拉强度和给定孔隙率的疲劳特性。