Development of process efficiency maps for selective laser sintering of polymeric composite powders: Modeling and experimental testing
Development of process efficiency maps for selective laser sintering of polymeric composite powders: Modeling and experimental testing
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DOI：
10.1016/j.jmatprotec.2017.11.027
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发表时间：
2018-04
影响因子：
6.3
通讯作者：
Fei Shen;Shangqin Yuan;C. Chua;K. Zhou
中科院分区：
文献类型：
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作者：
Fei Shen;Shangqin Yuan;C. Chua;K. Zhou
本研究通过数值模拟和实验测试，绘制了聚合物复合粉末选择性激光烧结的工艺效率图，为工艺参数的优化提供指导。具体地说，对碳纳米管增强PA12纳米复合粉末的烧结过程进行了模拟，以评估和预测其熔池的温度分布和尺寸。数值模型考虑了激光与粉床的相互作用、材料性质与温度的关系以及固-液相变。实验测试用于确定材料性能和验证建模预测。预测的熔池特征被用于开发工艺效率图，该图将打印生产率和激光能量消耗效率与激光功率和扫描速度相关联。
This study develops process efficiency maps for selective laser sintering of polymeric composite powders to provide guidance for process parameter optimization via numerical modeling and experimental testing. Specifically, the sintering process for carbon nanotubes-reinforced PA12 nanocomposite powders is modeled to evaluate and predict the temperature distribution and dimensions of their melt pools. The numerical model takes into account the interaction between the laser beam and powder bed, the temperature-dependent material properties and the solid-liquid phase transition. The experimental testing is used to determine the material properties and validate the modeling predictions. The predicted melt pool features are utilized for the development of process efficiency maps that relate the printing productivity and laser energy consumption efficiency to the laser power and scanning speed.