Using X-ray computed tomography to improve the porosity level of polyamide-12 laser sintered parts
Using X-ray computed tomography to improve the porosity level of polyamide-12 laser sintered parts
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DOI：
10.1016/j.cirp.2016.04.056
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发表时间：
2016-01-01
影响因子：
4.1
通讯作者：
Kruth, Jean-Pierre
中科院分区：
文献类型：
--
作者：
Dewulf, Wim;Pavan, Michele;Kruth, Jean-Pierre
孔隙率是决定激光烧结（LS）生产的聚合物部件的功能应用极限的关键参数。在本文中，X射线计算机断层扫描（CT）是用来调查的LS扫描参数（激光功率，舱口间距，扫描速度）和零件或特征尺寸的分布和尺寸的聚酰胺-12（PA 12）激光烧结零件内的孔的影响。平行于原始LS制造层创建CT模型切片，以确定每层内以及沿着后续层的孔隙度分布和变化。此外，将这些切片内的孔隙率分布映射到激光扫描轨迹上允许研究LS扫描参数的影响。这些孔隙度数据与机械测试结果的相关性允许识别最佳LS扫描参数。(C)2016年CIRP。
Porosity is a key parameter determining the functional application limits of polymeric parts produced by laser sintering (LS). In this paper, X-ray computed tomography (CT) is used to investigate the influence of the LS scanning parameters (laser power, hatch spacing, and scan speed) and part or feature size on the distribution and size of pores within polyamide-12 (PA12) laser sintered parts. CT model slices are created parallel to the original LS manufacturing layers in order to determine the porosity distribution and variation within each layer as well as along subsequent layers. Mapping the porosity distribution within these slices onto the laser scanning trajectory moreover allows investigating the influence of LS scanning parameters. Correlation of these porosity data with results from mechanical testing allows identifying optimal LS scanning parameters. (C) 2016 CIRP.