Abstract In additive manufacturing, polymer composites are used for setting tailored properties. Short glass fibers can be used as fillers for polyamide 12 for enhancing stiffness or tensile strength as well as for reducing shrinkage. In this paper, the effects of short glass fibers on polyamide 12 concerning powder properties, process behavior and part properties in laser beam melting of polymers (SLS) are investigated. It could be shown that by increasing the short glass fiber content powder properties as well as part properties are immensely affected. By adding glass fibers, powder properties, like flowability and diffuse reflection decrease. The isothermal crystallization changes resulting in a narrower processing window. Concerning mechanical properties, short glass fibers allow for a higher stiffness until a critical limit of filler concentration within this study is reached, after which the tensile strength decreases. The elongation of break decreases by rising the filler content.

中文翻译：

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短玻璃纤维对选择性激光束熔化过程中聚酰胺 12 工艺行为的影响

摘要 在增材制造中，聚合物复合材料用于设置定制的特性。短玻璃纤维可用作聚酰胺 12 的填料，以提高刚度或拉伸强度以及减少收缩。在本文中，研究了短玻璃纤维对聚酰胺 12 的影响，涉及粉末特性、工艺行为和聚合物激光束熔化 (SLS) 中的部件特性。可以表明，通过增加短玻璃纤维含量，粉末性能以及零件性能受到极大影响。通过添加玻璃纤维，粉末特性，如流动性和漫反射降低。等温结晶变化导致加工窗口变窄。关于机械性能，短玻璃纤维允许更高的刚度，直到达到本研究中填料浓度的临界极限，之后拉伸强度降低。断裂伸长率随着填料含量的增加而降低。