In this study, the bending strength characteristic of test specimens manufactured by the direct metal laser sintering method was investigated for different values of additive manufacturing (AM) parameters. The effect of heat treatment on bending strength was also researched by applying annealing and recrystallization annealing to the Ti-6Al-4V parts after the AM. The difference of bending strength values mainly resulting from the heat treatment processes has been explained by microstructural examinations of the specimens manufactured with default AM parameters set. The completed bending tests were verified by finite element analysis models. Moreover, the comparison of the specimen properties was made by material characterizations and density measurements. As a result of the bending tests, the usage of 180 µm instead of 140 µm which is the standard hatch spacing value of the additive machine provided the same level of bending strength with a shorter manufacturing period of time. In addition, higher bending strengths were obtained when the lower-cost annealing heat treatment was applied after the AM. Furthermore, the bending strength values of the specimens verified by the finite element method with a difference of 11.6%.

在这项研究中，针对不同的增材制造 (AM) 参数值，研究了通过直接金属激光烧结方法制造的试样的弯曲强度特性。通过对AM后的Ti-6Al-4V零件进行退火和再结晶退火，研究了热处理对弯曲强度的影响。主要由热处理过程引起的弯曲强度值的差异已通过使用默认 AM 参数设置制造的试样的微观结构检查来解释。完成的弯曲试验通过有限元分析模型进行了验证。此外，通过材料表征和密度测量对样品特性进行了比较。根据弯曲试验的结果，使用 180 µm 而不是 140 µm（增材机的标准舱口间距值）提供了相同水平的弯曲强度和更短的制造时间。此外，当在增材制造后进行低成本的退火热处理时，可以获得更高的弯曲强度。此外，经有限元法验证的试样的弯曲强度值相差11.6%。