Lattice structures are characterized by good mechanical efficiency because their particular geometry confers high strength and stiffness coupled to lightweight. These structures can be produced using a wide range of technologies, but the additive manufacturing ones are the most promising. In this work, the flexural properties of titanium alloy lattice structure made by means of electron beam melting process were investigated through the three-point bending test, carried out with three different span lengths. It was found that the span length influenced the load–displacement trend; moreover, the lower skin failure was observed in all the test conditions considered, but for the shortest span, the indentation of upper skin was found, too. The scanning electron microscope analysis showed the presence of dimples on the fracture surface, denoting a ductile fracture behavior.

中文翻译：

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电子束熔炼钛晶格结构的弯曲性能

晶格结构的特点是良好的机械效率，因为它们特殊的几何形状赋予了与轻量化相结合的高强度和刚度。这些结构可以使用多种技术生产，但增材制造技术是最有前途的。在这项工作中，通过三个不同跨度长度的三点弯曲试验研究了通过电子束熔化工艺制成的钛合金晶格结构的弯曲性能。发现跨度长度影响荷载-位移趋势；此外，在所有考虑的测试条件下都观察到下表皮失效，但对于最短的跨度，也发现了上表皮的压痕。扫描电镜分析表明断口存在凹坑，