A Study of Pore Formation During Single Layer and Multiple Layer Build by Selective Laser Melting
A Study of Pore Formation During Single Layer and Multiple Layer Build by Selective Laser Melting
复制标题
DOI：
--
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Subin Shrestha;T. Starr;K. Chou;J. Speed
中科院分区：
文献类型：
--
作者：
Subin Shrestha;T. Starr;K. Chou;J. Speed
本研究采用不同的孔口间距制备单层和多层膜，并利用微电子计算机层析成像技术研究其对孔隙率的影响。从先前的单道实验中选择了激光功率(100W、150W、175W和195W)和扫描速度(600 mm/S、800 mm/S、1000 mm/S和1200 mm/S)的组合，使气孔数量最少。根据轨道宽度选择六级舱口间距以形成单层和多层：轨道宽度的60%、70%、80%、90%、120%和150%。对于多层构建，在给定的参数窗口内小孔孔隙率的变化被发现归因于舱口间距的变化。一般情况下，随着孵化间距从60%增加到90%，孔数减少，但当孵化间距从90%进一步增加到120%时，孔数增加。
In this study, different hatch spacings were used to fabricate single layer and multiple layers, and its effect on porosity was investigated by using microcomputed tomography. The combination of laser power (100 W, 150 W, 175 W, and 195W) and scan speeds (600 mm/s, 800 mm/s, 1000 mm/s and 1200 mm/s) which resulted in the least number of pores were selected from the previous single-track experiment. Six levels of hatch spacings were selected based on the track width to form single and multiple layers: 60%, 70%, 80%, 90%, 120% and 150% of track widths. For the multilayer build, the variation in keyhole porosity within the given window of parameters were found to be attributed to the variation in the hatch spacing. In general, the pore number decreased with increase in hatch spacing from 60% to 90% but increased when hatch spacing further increased from 90% to 120%.